MySQL Cluster7.5でNDBINFOに新たに便利なテーブルが追加されているので、此方にリストアップしておきました。詳細に関しては、以下のマニュアルを参照下さい。

MySQL Cluster7.5 pdfマニュアル
20.1.4 What is New in MySQL NDB Cluster 7.5

あと、オンラインでデータノードを追加したあとに、テーブルのデータを再分布する場合のコマンドがALTER TABLE ~ ONLINEではなくなりました。
MySQLと同じALTER TABLE ~ ALGORITHM = INPLACE ~に変わりました。

ALTER TABLE Changes:
NDB Cluster formerly supported an alternative syntax for online ALTER TABLE.
This is no longer supported in NDB Cluster 7.5, which makes exclusive use of
ALGORITHM = DEFAULT|COPY|INPLACE for table DDL, as in the standard MySQL Server.

New Tables in NDBINFO
メタデータの確認や、MySQL Cluster内部で何処でLOCKが発生しているか確認し易くなってます。
便利です。


/***** provides per-thread CPU statistics gathered each second, for each thread running in the NDB kernel. ******/

mysql> select * from cpustat;
+---------+--------+---------+-----------+---------+-------------+-----------------+-----------------+-------------+--------------------+--------------+
| node_id | thr_no | OS_user | OS_system | OS_idle | thread_exec | thread_sleeping | thread_spinning | thread_send | thread_buffer_full | elapsed_time |
+---------+--------+---------+-----------+---------+-------------+-----------------+-----------------+-------------+--------------------+--------------+
|       1 |      0 |       0 |         0 |      99 |           1 |              99 |               0 |           0 |                  0 |      1022319 |
|       1 |      1 |       0 |         1 |      99 |           0 |             100 |               0 |           0 |                  0 |      1043157 |
|       1 |      2 |       1 |         0 |      99 |           0 |             100 |               0 |           0 |                  0 |      1044002 |
|       1 |      3 |       6 |         1 |      93 |           2 |              98 |               0 |           0 |                  0 |      1004561 |
|       2 |      0 |       0 |         0 |      99 |           0 |             100 |               0 |           0 |                  0 |      1021821 |
|       2 |      1 |       0 |         0 |     100 |           0 |             100 |               0 |           0 |                  0 |      1041181 |
|       2 |      2 |       0 |         0 |      99 |           0 |             100 |               0 |           0 |                  0 |      1000446 |
|       2 |      3 |       4 |         4 |      92 |           2 |              98 |               0 |           0 |                  0 |      1006593 |
+---------+--------+---------+-----------+---------+-------------+-----------------+-----------------+-------------+--------------------+--------------+
8 rows in set (0.01 sec)

/***** provides raw, per-thread CPU data obtained each second for each thread running in the NDB kernel.  ******/

mysql> select * from cpustat_1sec limit 5;
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
| node_id | thr_no | OS_user_time | OS_system_time | OS_idle_time | exec_time | sleep_time | spin_time | send_time | buffer_full_time | elapsed_time |
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
|       1 |      0 |         4249 |           6543 |      1008090 |      6723 |    1012159 |         0 |         0 |                0 |      1018882 |
|       1 |      0 |         3042 |           7882 |      1012472 |      6636 |    1016760 |         0 |         0 |                0 |      1023396 |
|       1 |      0 |         3779 |           6373 |      1003011 |      6882 |    1006281 |         0 |         0 |                0 |      1013163 |
|       1 |      0 |         2011 |           6151 |      1030521 |      5951 |    1032732 |         0 |         0 |                0 |      1038683 |
|       1 |      0 |         4056 |           5567 |      1039330 |      6329 |    1042624 |         0 |         0 |                0 |      1048953 |
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
5 rows in set (0.00 sec)

/***** provides raw, per-thread CPU data obtained each 50 milliseconds for each thread running in the NDB kernel ******/

mysql> select * from cpustat_50ms limit 5;
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
| node_id | thr_no | OS_user_time | OS_system_time | OS_idle_time | exec_time | sleep_time | spin_time | send_time | buffer_full_time | elapsed_time |
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
|       1 |      0 |          138 |            180 |        56563 |       244 |      56637 |         0 |         0 |                0 |        56881 |
|       1 |      0 |          411 |            537 |        58241 |       626 |      58563 |         0 |         0 |                0 |        59189 |
|       1 |      0 |          124 |            630 |        52635 |       471 |      52918 |         0 |         0 |                0 |        53389 |
|       1 |      0 |            0 |            943 |        49634 |       398 |      50179 |         0 |         0 |                0 |        50577 |
|       1 |      0 |            0 |            377 |        52557 |       299 |      52635 |         0 |         0 |                0 |        52934 |
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
5 rows in set (0.00 sec)

mysql>

/***** provides raw, per-thread CPU data obtained each 20 seconds, for each thread running in the NDB kernel. ******/

mysql> mysql> select * from cpustat_20sec limit 5;
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
| node_id | thr_no | OS_user_time | OS_system_time | OS_idle_time | exec_time | sleep_time | spin_time | send_time | buffer_full_time | elapsed_time |
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
|       1 |      0 |        85502 |         105281 |     19833351 |    131831 |   19892303 |         0 |         0 |                0 |     20024134 |
|       1 |      0 |        85028 |          98842 |     19820167 |    121907 |   19882130 |         0 |         0 |                0 |     20004037 |
|       1 |      0 |        77030 |         105719 |     19842259 |    121151 |   19903857 |         0 |         0 |                0 |     20025008 |
|       1 |      0 |        74431 |         101572 |     19827545 |    122715 |   19880833 |         0 |         0 |                0 |     20003548 |
|       1 |      0 |        85342 |         101835 |     19813255 |    127802 |   19872630 |         0 |         0 |                0 |     20000432 |
+---------+--------+--------------+----------------+--------------+-----------+------------+-----------+-----------+------------------+--------------+
5 rows in set (0.00 sec)

mysql> 


/***** provides information about threads running in the NDB kernel. ******/
 

mysql> select * from threads;
+---------+--------+-------------+------------------------------------------------------------------+
| node_id | thr_no | thread_name | thread_description                                               |
+---------+--------+-------------+------------------------------------------------------------------+
|       1 |      0 | main        | main thread, schema and distribution handling                    |
|       1 |      1 | rep         | rep thread, asynch replication and proxy block handling          |
|       1 |      2 | ldm         | ldm thread, handling a set of data partitions                    |
|       1 |      3 | recv        | receive thread, performing receieve and polling for new receives |
|       2 |      0 | main        | main thread, schema and distribution handling                    |
|       2 |      1 | rep         | rep thread, asynch replication and proxy block handling          |
|       2 |      2 | ldm         | ldm thread, handling a set of data partitions                    |
|       2 |      3 | recv        | receive thread, performing receieve and polling for new receives |
+---------+--------+-------------+------------------------------------------------------------------+
8 rows in set (0.01 sec)

mysql> 


/***** provides information about current lock requests holding and waiting for locks on NDB tables in an NDB Cluster , and is intended as a companion table to cluster_operations. ******/

mysql> desc cluster_locks;
+-----------------+---------------------+------+-----+---------+-------+
| Field           | Type                | Null | Key | Default | Extra |
+-----------------+---------------------+------+-----+---------+-------+
| node_id         | int(10) unsigned    | YES  |     | NULL    |       |
| block_instance  | int(10) unsigned    | YES  |     | NULL    |       |
| tableid         | int(10) unsigned    | YES  |     | NULL    |       |
| fragmentid      | int(10) unsigned    | YES  |     | NULL    |       |
| rowid           | bigint(20) unsigned | YES  |     | NULL    |       |
| transid         | bigint(22) unsigned | YES  |     | NULL    |       |
| mode            | varchar(1)          | NO   |     |         |       |
| state           | varchar(1)          | NO   |     |         |       |
| detail          | varchar(1)          | NO   |     |         |       |
| op              | varchar(9)          | NO   |     |         |       |
| duration_millis | int(10) unsigned    | YES  |     | NULL    |       |
| lock_num        | int(10) unsigned    | YES  |     | NULL    |       |
| waiting_for     | bigint(10) unsigned | YES  |     | NULL    |       |
+-----------------+---------------------+------+-----+---------+-------+
13 rows in set (0.00 sec)

mysql> 



/***** provides information about counts of lock claim requests, and the outcomes of these requests on a per-fragment basis, serving as a companion table to operations_per_fragment and memory_per_fragment.  ******/

mysql> select * from locks_per_fragment limit 5;
+------------------------------+------------------------+-------------------+----------+---------+----------------+--------------+--------+-----------+------------+--------------+--------+-----------+------------+--------------+----------------+------------------+
| fq_name                      | parent_fq_name         | type              | table_id | node_id | block_instance | fragment_num | ex_req | ex_imm_ok | ex_wait_ok | ex_wait_fail | sh_req | sh_imm_ok | sh_wait_ok | sh_wait_fail | wait_ok_millis | wait_fail_millis |
+------------------------------+------------------------+-------------------+----------+---------+----------------+--------------+--------+-----------+------------+--------------+--------+-----------+------------+--------------+----------------+------------------+
| TEST_DB/def/NDB$BLOB_82_1    | TEST_DB/def/T_NDB_JSON | User table        |       83 |       1 |              1 |            0 |      0 |         0 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
| TEST_DB/def/NDB$BLOB_82_1    | TEST_DB/def/T_NDB_JSON | User table        |       83 |       1 |              1 |            1 |      0 |         0 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
| TEST_DB/def/NDB$BLOB_82_1    | TEST_DB/def/T_NDB_JSON | User table        |       83 |       2 |              1 |            0 |      0 |         0 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
| TEST_DB/def/NDB$BLOB_82_1    | TEST_DB/def/T_NDB_JSON | User table        |       83 |       2 |              1 |            1 |      0 |         0 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
| sys/def/24/idx_memo01$unique | TEST_DB/def/T_TABLE01  | Unique hash index |       79 |       1 |              1 |            0 |     10 |        10 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
+------------------------------+------------------------+-------------------+----------+---------+----------------+--------------+--------+-----------+------------+--------------+--------+-----------+------------+--------------+----------------+------------------+
5 rows in set (0.03 sec)

mysql> 



mysql> select * from locks_per_fragment where fq_name like '%sbtest1';
+----------------------+----------------+------------+----------+---------+----------------+--------------+--------+-----------+------------+--------------+--------+-----------+------------+--------------+----------------+------------------+
| fq_name              | parent_fq_name | type       | table_id | node_id | block_instance | fragment_num | ex_req | ex_imm_ok | ex_wait_ok | ex_wait_fail | sh_req | sh_imm_ok | sh_wait_ok | sh_wait_fail | wait_ok_millis | wait_fail_millis |
+----------------------+----------------+------------+----------+---------+----------------+--------------+--------+-----------+------------+--------------+--------+-----------+------------+--------------+----------------+------------------+
| sysbench/def/sbtest1 | NULL           | User table |       90 |       1 |              1 |            0 |   5080 |      5080 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
| sysbench/def/sbtest1 | NULL           | User table |       90 |       1 |              1 |            1 |   4920 |      4920 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
| sysbench/def/sbtest1 | NULL           | User table |       90 |       2 |              1 |            0 |   5080 |      5080 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
| sysbench/def/sbtest1 | NULL           | User table |       90 |       2 |              1 |            1 |   4920 |      4920 |          0 |            0 |      0 |         0 |          0 |            0 |              0 |                0 |
+----------------------+----------------+------------+----------+---------+----------------+--------------+--------+-----------+------------+--------------+--------+-----------+------------+--------------+----------------+------------------+
4 rows in set (0.03 sec)

mysql> 


/***** similar in structure to the cluster_locks table, and provides a subset of the information found in the latter table, but which is specific to the SQL node ******/

mysql> desc server_locks;
+---------------------+---------------------+------+-----+---------+-------+
| Field               | Type                | Null | Key | Default | Extra |
+---------------------+---------------------+------+-----+---------+-------+
| mysql_connection_id | bigint(21) unsigned | NO   |     | 0       |       |
| node_id             | int(10) unsigned    | YES  |     | NULL    |       |
| block_instance      | int(10) unsigned    | YES  |     | NULL    |       |
| tableid             | int(10) unsigned    | YES  |     | NULL    |       |
| fragmentid          | int(10) unsigned    | YES  |     | NULL    |       |
| rowid               | bigint(20) unsigned | YES  |     | NULL    |       |
| transid             | bigint(22) unsigned | YES  |     | NULL    |       |
| mode                | varchar(1)          | NO   |     |         |       |
| state               | varchar(1)          | NO   |     |         |       |
| detail              | varchar(1)          | NO   |     |         |       |
| op                  | varchar(9)          | NO   |     |         |       |
| duration_millis     | int(10) unsigned    | YES  |     | NULL    |       |
| lock_num            | int(10) unsigned    | YES  |     | NULL    |       |
| waiting_for         | bigint(10) unsigned | YES  |     | NULL    |       |
+---------------------+---------------------+------+-----+---------+-------+
14 rows in set (0.00 sec)

mysql> 

/***** provides the names and types of database objects in NDB, as well as information about parent obejcts where applicable ******/

mysql> select * from dict_obj_info limit 5;
+------+------+----------+-------+-----------------+---------------+----------------------------+
| type | id   | version  | state | parent_obj_type | parent_obj_id | fq_name                    |
+------+------+----------+-------+-----------------+---------------+----------------------------+
|    6 |   89 |        1 |     4 |               2 |            88 | sys/def/88/PRIMARY         |
|   18 |   44 |        1 |     4 |               6 |            98 | NDB$INDEX_98_CUSTOM        |
|    2 |   31 | 16777218 |     4 |               0 |             0 | TEST_DB_InnoDB/def/Country |
|    6 |   59 |        1 |     4 |               2 |            33 | sys/def/33/PRIMARY         |
|   18 |    2 |        1 |     4 |               6 |            37 | NDB$INDEX_37_CUSTOM        |
+------+------+----------+-------+-----------------+---------------+----------------------------+
5 rows in set (0.00 sec)

mysql> 


/***** provides NDB table distribution status information  ******/

mysql> select * from table_distribution_status limit 5;
+---------+----------+-----------------+-------------------+----------------+------------+-------------+----------------+---------------+--------------------+-----------------+------------------+
| node_id | table_id | tab_copy_status | tab_update_status | tab_lcp_status | tab_status | tab_storage | tab_partitions | tab_fragments | current_scan_count | scan_count_wait | is_reorg_ongoing |
+---------+----------+-----------------+-------------------+----------------+------------+-------------+----------------+---------------+--------------------+-----------------+------------------+
|       1 |        2 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
|       1 |        3 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
|       1 |       11 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
|       1 |       12 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
|       1 |       13 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
+---------+----------+-----------------+-------------------+----------------+------------+-------------+----------------+---------------+--------------------+-----------------+------------------+
5 rows in set (0.00 sec)

mysql> 


/***** provides information about the distribution of NDB table fragments   ******/

mysql> select * from table_fragments limit 5;
+---------+----------+--------------+-------------+-----------------+-------------+----------------+-----------------+-------------------+----------------------+-----------------------+----------------------+--------------------+-------------------+------------------+
| node_id | table_id | partition_id | fragment_id | partition_order | log_part_id | no_of_replicas | current_primary | preferred_primary | current_first_backup | current_second_backup | current_third_backup | num_alive_replicas | num_dead_replicas | num_lcp_replicas |
+---------+----------+--------------+-------------+-----------------+-------------+----------------+-----------------+-------------------+----------------------+-----------------------+----------------------+--------------------+-------------------+------------------+
|       1 |        2 |   4294967295 |           0 |               0 |           0 |              2 |               1 |                 1 |                    2 |                     0 |                    0 |                  2 |                 0 |                0 |
|       1 |        2 |   4294967295 |           1 |               0 |           0 |              2 |               2 |                 2 |                    1 |                     0 |                    0 |                  2 |                 0 |                0 |
|       1 |        3 |   4294967295 |           0 |               0 |           1 |              2 |               1 |                 1 |                    2 |                     0 |                    0 |                  2 |                 0 |                0 |
|       1 |        3 |   4294967295 |           1 |               0 |           1 |              2 |               2 |                 2 |                    1 |                     0 |                    0 |                  2 |                 0 |                0 |
|       1 |       11 |   4294967295 |           0 |               0 |           3 |              2 |               1 |                 1 |                    2 |                     0 |                    0 |                  2 |                 0 |                0 |
+---------+----------+--------------+-------------+-----------------+-------------+----------------+-----------------+-------------------+----------------------+-----------------------+----------------------+--------------------+-------------------+------------------+
5 rows in set (0.00 sec)

mysql> 

/***** provides information about logging, checkpointing, storage, and other options in force for each NDB table    ******/

mysql> select * from table_info where table_id = 31;
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
| table_id | logged_table | row_contains_gci | row_contains_checksum | read_backup | fully_replicated | storage_type | hashmap_id | partition_balance | create_gci |
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
|       31 |            1 |                1 |                     1 |           0 |                0 | MEMORY       |          1 | FOR_RP_BY_LDM     |          0 |
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
1 row in set (0.01 sec)

mysql> 


mysql> select * from table_info where table_id = 90;
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
| table_id | logged_table | row_contains_gci | row_contains_checksum | read_backup | fully_replicated | storage_type | hashmap_id | partition_balance | create_gci |
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
|       90 |            1 |                1 |                     1 |           1 |                0 | MEMORY       |          1 | SPECIFIC          |          0 |
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
1 row in set (0.01 sec)

mysql> 

/***** provides information about fragment replicas   ******/

mysql> select * from table_replicas limit 5;
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
| node_id | table_id | fragment_id | initial_gci | replica_node_id | is_lcp_ongoing | num_crashed_replicas | last_max_gci_started | last_max_gci_completed | last_lcp_id | prev_lcp_id | prev_max_gci_started | prev_max_gci_completed | last_create_gci | last_replica_gci | is_replica_alive |
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
|       1 |        2 |           0 |           2 |               1 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
|       1 |        2 |           0 |           2 |               2 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
|       1 |        2 |           1 |           2 |               1 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
|       1 |        2 |           1 |           2 |               2 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
|       1 |        3 |           0 |           2 |               1 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
5 rows in set (0.00 sec)

mysql> 


mysql> select * from table_replicas where table_id = 90;
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
| node_id | table_id | fragment_id | initial_gci | replica_node_id | is_lcp_ongoing | num_crashed_replicas | last_max_gci_started | last_max_gci_completed | last_lcp_id | prev_lcp_id | prev_max_gci_started | prev_max_gci_completed | last_create_gci | last_replica_gci | is_replica_alive |
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
|       1 |       90 |           0 |       36225 |               1 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
|       1 |       90 |           0 |       36225 |               2 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
|       1 |       90 |           1 |       36225 |               1 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
|       1 |       90 |           1 |       36225 |               2 |              0 |                    0 |               100360 |                 100360 |          45 |       85293 |                85293 |                     44 |           85293 |       4294967295 |                1 |
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
4 rows in set (0.01 sec)

mysql> 

config_paramsとconfig_valuesをJOINした結果

パラメータ確認し易くて良い


mysql> SELECT  p.param_name AS Name,
    ->         v.node_id AS Node,
    ->         p.param_type AS Type,
    ->         p.param_default AS 'Default',
    ->         p.param_min AS Minimum,
    ->         p.param_max AS Maximum,
    ->         CASE p.param_mandatory WHEN 1 THEN 'Y' ELSE 'N' END AS 'Required',
    ->         v.config_value AS Current
    -> FROM    config_params p
    -> JOIN    config_values v
    -> ON      p.param_number = v.config_param
    -> WHERE   p. param_name IN ('NodeId', 'HostName','DataMemory', 'IndexMemory');
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
| Name        | Node | Type     | Default   | Minimum | Maximum       | Required | Current        |
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
| NodeId      |    1 | unsigned |           | 1       | 48            | Y        | 1              |
| HostName    |    1 | string   | localhost |         |               | N        | 192.168.56.114 |
| DataMemory  |    1 | unsigned | 83886080  | 1048576 | 1099511627776 | N        | 134217728      |
| IndexMemory |    1 | unsigned | 18874368  | 1048576 | 1099511627776 | N        | 68157440       |
| NodeId      |    2 | unsigned |           | 1       | 48            | Y        | 2              |
| HostName    |    2 | string   | localhost |         |               | N        | 192.168.56.115 |
| DataMemory  |    2 | unsigned | 83886080  | 1048576 | 1099511627776 | N        | 134217728      |
| IndexMemory |    2 | unsigned | 18874368  | 1048576 | 1099511627776 | N        | 68157440       |
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
8 rows in set (0.02 sec)

cluster_locksでロックを確認した場合


mysql> select * from ndbinfo.cluster_locks;
+---------+----------------+---------+------------+-------+-------------------+------+-------+--------+------+-----------------+----------+-------------+
| node_id | block_instance | tableid | fragmentid | rowid | transid           | mode | state | detail | op   | duration_millis | lock_num | waiting_for |
+---------+----------------+---------+------------+-------+-------------------+------+-------+--------+------+-----------------+----------+-------------+
|       2 |              1 |     107 |          1 |     0 | 13569072998383655 | X    | W     |        | READ |            2593 |        0 |           1 |
|       2 |              1 |     107 |          1 |     0 | 13567973486755886 | S    | H     | *      | READ |            7641 |        1 |        NULL |
|       2 |              1 |     113 |          1 |     0 | 13567973486755886 | S    | H     | *      | READ |            7641 |        3 |        NULL |
+---------+----------------+---------+------------+-------+-------------------+------+-------+--------+------+-----------------+----------+-------------+
3 rows in set (0.04 sec)

MySQL7.5のDefault設定値
何も設定しなければ、こちらの値が適用されます。

+------------------------------------------+----------+------------+----------+----------------+----------+
| Name                                     | Type     | Default    | Minimum  | Maximum        | Required |
+------------------------------------------+----------+------------+----------+----------------+----------+
| MaxNoOfSubscriptions                     | unsigned | 0          | 0        | 4294967039     | N        |
| MaxNoOfSubscribers                       | unsigned | 0          | 0        | 4294967039     | N        |
| MaxNoOfConcurrentSubOperations           | unsigned | 256        | 0        | 4294967039     | N        |
| TcpBind_INADDR_ANY                       | bool     | 0          |          |                | N        |
| HostName                                 | string   | localhost  |          |                | N        |
| NodeId                                   | unsigned |            | 1        | 48             | Y        |
| ServerPort                               | unsigned |            | 1        | 65535          | N        |
| NoOfReplicas                             | unsigned | 2          | 1        | 4              | N        |
| MaxNoOfAttributes                        | unsigned | 1000       | 32       | 4294967039     | N        |
| MaxNoOfTables                            | unsigned | 128        | 8        | 20320          | N        |
| MaxNoOfOrderedIndexes                    | unsigned | 128        | 0        | 4294967039     | N        |
| MaxNoOfUniqueHashIndexes                 | unsigned | 64         | 0        | 4294967039     | N        |
| MaxNoOfConcurrentIndexOperations         | unsigned | 8192       | 0        | 4294967039     | N        |
| MaxNoOfTriggers                          | unsigned | 768        | 0        | 4294967039     | N        |
| MaxNoOfFiredTriggers                     | unsigned | 4000       | 0        | 4294967039     | N        |
| MaxNoOfSavedMessages                     | unsigned | 25         | 0        | 4294967039     | N        |
| LockExecuteThreadToCPU                   | bitmask  |            |          |                | N        |
| LockMaintThreadsToCPU                    | unsigned |            | 0        | 65535          | N        |
| RealtimeScheduler                        | bool     | 0          |          |                | N        |
| LockPagesInMainMemory                    | unsigned | 0          | 0        | 2              | N        |
| TimeBetweenWatchDogCheck                 | unsigned | 6000       | 70       | 4294967039     | N        |
| SchedulerExecutionTimer                  | unsigned | 50         | 0        | 11000          | N        |
| MaxSendDelay                             | unsigned | 0          | 0        | 11000          | N        |
| SchedulerSpinTimer                       | unsigned | 0          | 0        | 500            | N        |
| SchedulerResponsiveness                  | unsigned | 5          | 0        | 10             | N        |
| __sched_scan_priority                    | unsigned | 6          | 1        | 6              | N        |
| TimeBetweenWatchDogCheckInitial          | unsigned | 6000       | 70       | 4294967039     | N        |
| StopOnError                              | bool     | 1          |          |                | N        |
| MaxNoOfConcurrentOperations              | unsigned | 32768      | 32       | 4294967039     | N        |
| MaxDMLOperationsPerTransaction           | unsigned | 4294967295 | 32       | 4294967295     | N        |
| MaxNoOfLocalOperations                   | unsigned |            | 32       | 4294967039     | N        |
| MaxNoOfLocalScans                        | unsigned |            | 32       | 4294967039     | N        |
| BatchSizePerLocalScan                    | unsigned | 256        | 1        | 992            | N        |
| MaxNoOfConcurrentTransactions            | unsigned | 4096       | 32       | 4294967039     | N        |
| MaxNoOfConcurrentScans                   | unsigned | 256        | 2        | 500            | N        |
| TransactionBufferMemory                  | unsigned | 1048576    | 1024     | 4294967039     | N        |
| IndexMemory                              | unsigned | 18874368   | 1048576  | 1099511627776  | N        |
| DataMemory                               | unsigned | 83886080   | 1048576  | 1099511627776  | N        |
| UndoIndexBuffer                          | unsigned | 2097152    | 1048576  | 4294967039     | N        |
| UndoDataBuffer                           | unsigned | 16777216   | 1048576  | 4294967039     | N        |
| RedoBuffer                               | unsigned | 33554432   | 1048576  | 4294967039     | N        |
| LongMessageBuffer                        | unsigned | 67108864   | 524288   | 4294967039     | N        |
| DiskPageBufferMemory                     | unsigned | 67108864   | 4194304  | 1099511627776  | N        |
| SharedGlobalMemory                       | unsigned | 134217728  | 0        | 70368744177664 | N        |
| StartPartialTimeout                      | unsigned | 30000      | 0        | 4294967039     | N        |
| StartPartitionedTimeout                  | unsigned | 60000      | 0        | 4294967039     | N        |
| StartFailureTimeout                      | unsigned | 0          | 0        | 4294967039     | N        |
| StartNoNodegroupTimeout                  | unsigned | 15000      | 0        | 4294967039     | N        |
| HeartbeatIntervalDbDb                    | unsigned | 5000       | 10       | 4294967039     | N        |
| ConnectCheckIntervalDelay                | unsigned | 0          | 0        | 4294967039     | N        |
| HeartbeatIntervalDbApi                   | unsigned | 1500       | 100      | 4294967039     | N        |
| TimeBetweenLocalCheckpoints              | unsigned | 20         | 0        | 31             | N        |
| TimeBetweenGlobalCheckpoints             | unsigned | 2000       | 20       | 32000          | N        |
| TimeBetweenGlobalCheckpointsTimeout      | unsigned | 120000     | 10       | 4294967039     | N        |
| TimeBetweenEpochs                        | unsigned | 100        | 0        | 32000          | N        |
| TimeBetweenEpochsTimeout                 | unsigned | 0          | 0        | 256000         | N        |
| MaxBufferedEpochs                        | unsigned | 100        | 1        | 100000         | N        |
| MaxBufferedEpochBytes                    | unsigned | 26214400   | 26214400 | 4294967039     | N        |
| NoOfFragmentLogParts                     | unsigned | 4          | 4        | 32             | N        |
| NoOfFragmentLogFiles                     | unsigned | 16         | 3        | 4294967039     | N        |
| FragmentLogFileSize                      | unsigned | 16777216   | 4194304  | 1073741824     | N        |
| InitFragmentLogFiles                     | string   | sparse     |          |                | N        |
| DiskIOThreadPool                         | unsigned | 2          | 0        | 4294967039     | N        |
| MaxNoOfOpenFiles                         | unsigned |            | 20       | 4294967039     | N        |
| InitialNoOfOpenFiles                     | unsigned | 27         | 20       | 4294967039     | N        |
| TimeBetweenInactiveTransactionAbortCheck | unsigned | 1000       | 1000     | 4294967039     | N        |
| TransactionInactiveTimeout               | unsigned | 4294967039 | 0        | 4294967039     | N        |
| TransactionDeadlockDetectionTimeout      | unsigned | 1200       | 50       | 4294967039     | N        |
| Diskless                                 | bool     | 0          |          |                | N        |
| ArbitrationTimeout                       | unsigned | 7500       | 10       | 4294967039     | N        |
| Arbitration                              | enum     | Default    |          |                | N        |
| DataDir                                  | string   | .          |          |                | N        |
| FileSystemPath                           | string   |            |          |                | N        |
| LogLevelStartup                          | unsigned | 1          | 0        | 15             | N        |
| LogLevelShutdown                         | unsigned | 0          | 0        | 15             | N        |
| LogLevelStatistic                        | unsigned | 0          | 0        | 15             | N        |
| LogLevelCheckpoint                       | unsigned | 0          | 0        | 15             | N        |
| LogLevelNodeRestart                      | unsigned | 0          | 0        | 15             | N        |
| LogLevelConnection                       | unsigned | 0          | 0        | 15             | N        |
| LogLevelCongestion                       | unsigned | 0          | 0        | 15             | N        |
| LogLevelError                            | unsigned | 0          | 0        | 15             | N        |
| LogLevelInfo                             | unsigned | 0          | 0        | 15             | N        |
| BackupDataDir                            | string   |            |          |                | N        |
| DiskSyncSize                             | unsigned | 4194304    | 32768    | 4294967039     | N        |
| MinDiskWriteSpeed                        | unsigned | 10485760   | 1048576  | 1099511627776  | N        |
| MaxDiskWriteSpeed                        | unsigned | 20971520   | 1048576  | 1099511627776  | N        |
| MaxDiskWriteSpeedOtherNodeRestart        | unsigned | 52428800   | 1048576  | 1099511627776  | N        |
| MaxDiskWriteSpeedOwnRestart              | unsigned | 209715200  | 1048576  | 1099511627776  | N        |
| BackupDiskWriteSpeedPct                  | unsigned | 50         | 0        | 90             | N        |
| BackupDataBufferSize                     | unsigned | 16777216   | 524288   | 4294967039     | N        |
| BackupLogBufferSize                      | unsigned | 16777216   | 2097152  | 4294967039     | N        |
| BackupWriteSize                          | unsigned | 262144     | 32768    | 4294967039     | N        |
| BackupMaxWriteSize                       | unsigned | 1048576    | 262144   | 4294967039     | N        |
| StringMemory                             | unsigned | 25         | 0        | 4294967039     | N        |
| MaxAllocate                              | unsigned | 33554432   | 1048576  | 1073741824     | N        |
| MemReportFrequency                       | unsigned | 0          | 0        | 4294967039     | N        |
| BackupReportFrequency                    | unsigned | 0          | 0        | 4294967039     | N        |
| StartupStatusReportFrequency             | unsigned | 0          | 0        | 4294967039     | N        |
| ODirect                                  | bool     | 0          |          |                | N        |
| CompressedBackup                         | bool     | 0          |          |                | N        |
| CompressedLCP                            | bool     | 0          |          |                | N        |
| ExtraSendBufferMemory                    | unsigned | 0          | 0        | 34359738368    | N        |
| TotalSendBufferMemory                    | unsigned | 0          | 262144   | 4294967039     | N        |
| Nodegroup                                | unsigned |            | 0        | 65536          | N        |
| MaxNoOfExecutionThreads                  | unsigned | 0          | 2        | 72             | N        |
| __ndbmt_lqh_workers                      | unsigned |            | 1        | 4              | N        |
| __ndbmt_lqh_threads                      | unsigned |            | 1        | 4              | N        |
| __ndbmt_classic                          | bool     |            |          |                | N        |
| ThreadConfig                             | string   |            |          |                | N        |
| FileSystemPathDD                         | string   |            |          |                | N        |
| FileSystemPathDataFiles                  | string   |            |          |                | N        |
| FileSystemPathUndoFiles                  | string   |            |          |                | N        |
| InitialLogfileGroup                      | string   |            |          |                | N        |
| InitialTablespace                        | string   |            |          |                | N        |
| MaxLCPStartDelay                         | unsigned | 0          | 0        | 600            | N        |
| BuildIndexThreads                        | unsigned | 0          | 0        | 128            | N        |
| HeartbeatOrder                           | unsigned | 0          | 0        | 65535          | N        |
| DictTrace                                | unsigned |            | 0        | 100            | N        |
| MaxStartFailRetries                      | unsigned | 3          | 0        | 4294967039     | N        |
| StartFailRetryDelay                      | unsigned | 0          | 0        | 4294967039     | N        |
| EventLogBufferSize                       | unsigned | 8192       | 0        | 65536          | N        |
| Numa                                     | unsigned | 1          | 0        | 1              | N        |
| RedoOverCommitLimit                      | unsigned | 20         | 0        | 4294967039     | N        |
| RedoOverCommitCounter                    | unsigned | 3          | 0        | 4294967039     | N        |
| LateAlloc                                | unsigned | 1          | 0        | 1              | N        |
| MaxParallelCopyInstances                 | unsigned | 0          | 0        | 64             | N        |
| TwoPassInitialNodeRestartCopy            | bool     | 0          |          |                | N        |
| MaxParallelScansPerFragment              | unsigned | 256        | 1        | 4294967039     | N        |
| IndexStatAutoCreate                      | unsigned | 0          | 0        | 1              | N        |
| IndexStatAutoUpdate                      | unsigned | 0          | 0        | 1              | N        |
| IndexStatSaveSize                        | unsigned | 32768      | 0        | 4294967039     | N        |
| IndexStatSaveScale                       | unsigned | 100        | 0        | 4294967039     | N        |
| IndexStatTriggerPct                      | unsigned | 100        | 0        | 4294967039     | N        |
| IndexStatTriggerScale                    | unsigned | 100        | 0        | 4294967039     | N        |
| IndexStatUpdateDelay                     | unsigned | 60         | 0        | 4294967039     | N        |
| CrashOnCorruptedTuple                    | bool     | 1          |          |                | N        |
| MinFreePct                               | unsigned | 5          | 0        | 100            | N        |
| DefaultHashmapSize                       | unsigned | 0          | 0        | 3840           | N        |
| LcpScanProgressTimeout                   | unsigned | 60         | 0        | 4294967039     | N        |
| __at_restart_skip_indexes                | bool     | 0          |          |                | N        |
| __at_restart_skip_fks                    | bool     | 0          |          |                | N        |
| __debug_mixology_level                   | unsigned | 0          | 0        | 4294967039     | N        |
| RestartSubscriberConnectTimeout          | unsigned | 120000     | 0        | 4294967039     | N        |
| DiskPageBufferEntries                    | unsigned | 10         | 1        | 4294967295     | N        |
+------------------------------------------+----------+------------+----------+----------------+----------+

先日、パフォーマンス検証したMySQL Cluster(7.5.3 RC)ですが、MySQL Cluster7.5.4でついにGAになりました。高可用性、インメモリー処理、トランザクション対応したNoSQL/SQL処理、オンライン拡張性が求められるシステムを探されている場合は、是非試してみて下さい。

7.5では、パフォーマンス最適化オプションだけでなく、ndbinfoから様々な構成や稼働情報を簡単に確認する事が出来るようになっています。これまで、クラスターコンフィグファイル等で確認していた内容もクエリーで即座に複数ノードを跨った設定を確認出来るようになってますので、これまで以上に運用がし易くなるかと思います。

Changes in MySQL Cluster NDB 7.5.4 (5.7.16-ndb-7.5.4) (2016-10-18, General Availability)
http://dev.mysql.com/doc/relnotes/mysql-cluster/7.5/en/mysql-cluster-news-7-5-4.html

MySQL Cluster 7.5 パフォーマンス検証

確認:バージョン

mysql> select @@version;
+----------------------------------------------+
| @@version                                    |
+----------------------------------------------+
| 5.7.16-ndb-7.5.4-cluster-commercial-advanced |
+----------------------------------------------+
1 row in set (0.00 sec)

mysql> 

config_paramsとconfig_valuesを利用したMySQL Clusterパラメータの容易な確認

mysql> SELECT  p.param_name AS Name,
    ->         v.node_id AS Node,
    ->         p.param_type AS Type,
    ->         p.param_default AS 'Default',
    ->         p.param_min AS Minimum,
    ->         p.param_max AS Maximum,
    ->         CASE p.param_mandatory WHEN 1 THEN 'Y' ELSE 'N' END AS 'Required',
    ->         v.config_value AS Current
    -> FROM    config_params p
    -> JOIN    config_values v
    -> ON      p.param_number = v.config_param
    -> WHERE   p. param_name IN ('NodeId', 'HostName','DataMemory', 'IndexMemory');
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
| Name        | Node | Type     | Default   | Minimum | Maximum       | Required | Current        |
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
| NodeId      |    1 | unsigned |           | 1       | 48            | Y        | 1              |
| HostName    |    1 | string   | localhost |         |               | N        | 192.168.56.114 |
| DataMemory  |    1 | unsigned | 83886080  | 1048576 | 1099511627776 | N        | 134217728      |
| IndexMemory |    1 | unsigned | 18874368  | 1048576 | 1099511627776 | N        | 68157440       |
| NodeId      |    2 | unsigned |           | 1       | 48            | Y        | 2              |
| HostName    |    2 | string   | localhost |         |               | N        | 192.168.56.115 |
| DataMemory  |    2 | unsigned | 83886080  | 1048576 | 1099511627776 | N        | 134217728      |
| IndexMemory |    2 | unsigned | 18874368  | 1048576 | 1099511627776 | N        | 68157440       |
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
8 rows in set (0.03 sec)

mysql> 

mysql> SELECT  p.param_name AS Name,
    ->         v.node_id AS Node,
    ->         p.param_type AS Type,
    ->         p.param_default AS 'Default',
    ->         p.param_min AS Minimum,
    ->         p.param_max AS Maximum,
    ->         CASE p.param_mandatory WHEN 1 THEN 'Y' ELSE 'N' END AS 'Required',
    ->         v.config_value AS Current
    -> FROM    config_params p
    -> JOIN    config_values v
    -> ON      p.param_number = v.config_param
    -> WHERE   p. param_name like 'max%';
+-----------------------------------+------+----------+------------+----------+---------------+----------+------------+
| Name                              | Node | Type     | Default    | Minimum  | Maximum       | Required | Current    |
+-----------------------------------+------+----------+------------+----------+---------------+----------+------------+
| MaxNoOfSavedMessages              |    1 | unsigned | 25         | 0        | 4294967039    | N        | 25         |
| MaxNoOfTables                     |    1 | unsigned | 128        | 8        | 20320         | N        | 130        |
| MaxNoOfAttributes                 |    1 | unsigned | 1000       | 32       | 4294967039    | N        | 1009       |
| MaxNoOfTriggers                   |    1 | unsigned | 768        | 0        | 4294967039    | N        | 1784       |
| MaxNoOfConcurrentTransactions     |    1 | unsigned | 4096       | 32       | 4294967039    | N        | 4096       |
| MaxNoOfConcurrentOperations       |    1 | unsigned | 32768      | 32       | 4294967039    | N        | 10000      |
| MaxNoOfConcurrentScans            |    1 | unsigned | 256        | 2        | 500           | N        | 256        |
| MaxNoOfFiredTriggers              |    1 | unsigned | 4000       | 0        | 4294967039    | N        | 4000       |
| MaxNoOfConcurrentIndexOperations  |    1 | unsigned | 8192       | 0        | 4294967039    | N        | 8192       |
| MaxNoOfOrderedIndexes             |    1 | unsigned | 128        | 0        | 4294967039    | N        | 512        |
| MaxNoOfUniqueHashIndexes          |    1 | unsigned | 64         | 0        | 4294967039    | N        | 64         |
| MaxAllocate                       |    1 | unsigned | 33554432   | 1048576  | 1073741824    | N        | 33554432   |
| MaxNoOfSubscriptions              |    1 | unsigned | 0          | 0        | 4294967039    | N        | 0          |
| MaxNoOfSubscribers                |    1 | unsigned | 0          | 0        | 4294967039    | N        | 0          |
| MaxNoOfConcurrentSubOperations    |    1 | unsigned | 256        | 0        | 4294967039    | N        | 256        |
| MaxBufferedEpochs                 |    1 | unsigned | 100        | 1        | 100000        | N        | 100        |
| MaxNoOfExecutionThreads           |    1 | unsigned | 0          | 2        | 72            | N        | 2          |
| MaxBufferedEpochBytes             |    1 | unsigned | 26214400   | 26214400 | 4294967039    | N        | 26214400   |
| MaxLCPStartDelay                  |    1 | unsigned | 0          | 0        | 600           | N        | 0          |
| MaxStartFailRetries               |    1 | unsigned | 3          | 0        | 4294967039    | N        | 3          |
| MaxParallelScansPerFragment       |    1 | unsigned | 256        | 1        | 4294967039    | N        | 256        |
| MaxDMLOperationsPerTransaction    |    1 | unsigned | 4294967295 | 32       | 4294967295    | N        | 4294967295 |
| MaxDiskWriteSpeed                 |    1 | unsigned | 20971520   | 1048576  | 1099511627776 | N        | 20971520   |
| MaxDiskWriteSpeedOtherNodeRestart |    1 | unsigned | 52428800   | 1048576  | 1099511627776 | N        | 52428800   |
| MaxDiskWriteSpeedOwnRestart       |    1 | unsigned | 209715200  | 1048576  | 1099511627776 | N        | 209715200  |
| MaxParallelCopyInstances          |    1 | unsigned | 0          | 0        | 64            | N        | 0          |
| MaxSendDelay                      |    1 | unsigned | 0          | 0        | 11000         | N        | 0          |
| MaxNoOfSavedMessages              |    2 | unsigned | 25         | 0        | 4294967039    | N        | 25         |
| MaxNoOfTables                     |    2 | unsigned | 128        | 8        | 20320         | N        | 130        |
| MaxNoOfAttributes                 |    2 | unsigned | 1000       | 32       | 4294967039    | N        | 1009       |
| MaxNoOfTriggers                   |    2 | unsigned | 768        | 0        | 4294967039    | N        | 1784       |
| MaxNoOfConcurrentTransactions     |    2 | unsigned | 4096       | 32       | 4294967039    | N        | 4096       |
| MaxNoOfConcurrentOperations       |    2 | unsigned | 32768      | 32       | 4294967039    | N        | 10000      |
| MaxNoOfConcurrentScans            |    2 | unsigned | 256        | 2        | 500           | N        | 256        |
| MaxNoOfFiredTriggers              |    2 | unsigned | 4000       | 0        | 4294967039    | N        | 4000       |
| MaxNoOfConcurrentIndexOperations  |    2 | unsigned | 8192       | 0        | 4294967039    | N        | 8192       |
| MaxNoOfOrderedIndexes             |    2 | unsigned | 128        | 0        | 4294967039    | N        | 512        |
| MaxNoOfUniqueHashIndexes          |    2 | unsigned | 64         | 0        | 4294967039    | N        | 64         |
| MaxAllocate                       |    2 | unsigned | 33554432   | 1048576  | 1073741824    | N        | 33554432   |
| MaxNoOfSubscriptions              |    2 | unsigned | 0          | 0        | 4294967039    | N        | 0          |
| MaxNoOfSubscribers                |    2 | unsigned | 0          | 0        | 4294967039    | N        | 0          |
| MaxNoOfConcurrentSubOperations    |    2 | unsigned | 256        | 0        | 4294967039    | N        | 256        |
| MaxBufferedEpochs                 |    2 | unsigned | 100        | 1        | 100000        | N        | 100        |
| MaxNoOfExecutionThreads           |    2 | unsigned | 0          | 2        | 72            | N        | 2          |
| MaxBufferedEpochBytes             |    2 | unsigned | 26214400   | 26214400 | 4294967039    | N        | 26214400   |
| MaxLCPStartDelay                  |    2 | unsigned | 0          | 0        | 600           | N        | 0          |
| MaxStartFailRetries               |    2 | unsigned | 3          | 0        | 4294967039    | N        | 3          |
| MaxParallelScansPerFragment       |    2 | unsigned | 256        | 1        | 4294967039    | N        | 256        |
| MaxDMLOperationsPerTransaction    |    2 | unsigned | 4294967295 | 32       | 4294967295    | N        | 4294967295 |
| MaxDiskWriteSpeed                 |    2 | unsigned | 20971520   | 1048576  | 1099511627776 | N        | 20971520   |
| MaxDiskWriteSpeedOtherNodeRestart |    2 | unsigned | 52428800   | 1048576  | 1099511627776 | N        | 52428800   |
| MaxDiskWriteSpeedOwnRestart       |    2 | unsigned | 209715200  | 1048576  | 1099511627776 | N        | 209715200  |
| MaxParallelCopyInstances          |    2 | unsigned | 0          | 0        | 64            | N        | 0          |
| MaxSendDelay                      |    2 | unsigned | 0          | 0        | 11000         | N        | 0          |
+-----------------------------------+------+----------+------------+----------+---------------+----------+------------+
54 rows in set (0.01 sec)

mysql> 

dict_obj_info
The dict_obj_info table provides information about
NDB data dictionary (DICT) objects such as tables and indexes.
こちらのテーブルはNDBデータディクショナリーの情報を確認する事が可能です。


mysql> select * from dict_obj_info limit 5;
+------+------+----------+-------+-----------------+---------------+----------------------------+
| type | id   | version  | state | parent_obj_type | parent_obj_id | fq_name                    |
+------+------+----------+-------+-----------------+---------------+----------------------------+
|    6 |   89 |        1 |     4 |               2 |            88 | sys/def/88/PRIMARY         |
|   18 |   44 |        1 |     4 |               6 |            98 | NDB$INDEX_98_CUSTOM        |
|    2 |   31 | 16777218 |     4 |               0 |             0 | TEST_DB_InnoDB/def/Country |
|    6 |   59 |        1 |     4 |               2 |            33 | sys/def/33/PRIMARY         |
|   18 |    2 |        1 |     4 |               6 |            37 | NDB$INDEX_37_CUSTOM        |
+------+------+----------+-------+-----------------+---------------+----------------------------+
5 rows in set (0.00 sec)

mysql> 

table_distribution_status
The table_distribution_status table provides information about the progress of table distribution for NDB tables.
こちらのテーブルでは、NDBテーブルのディストリビューションステータスを確認する事が可能です。

mysql> select * from table_distribution_status limit 5;
+---------+----------+-----------------+-------------------+----------------+------------+-------------+----------------+---------------+--------------------+-----------------+------------------+
| node_id | table_id | tab_copy_status | tab_update_status | tab_lcp_status | tab_status | tab_storage | tab_partitions | tab_fragments | current_scan_count | scan_count_wait | is_reorg_ongoing |
+---------+----------+-----------------+-------------------+----------------+------------+-------------+----------------+---------------+--------------------+-----------------+------------------+
|       1 |        2 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
|       1 |        3 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
|       1 |       11 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
|       1 |       12 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
|       1 |       13 | IDLE            | IDLE              | COMPLETED      | ACTIVE     | NORMAL      |              2 |             2 |                  0 |               0 |                0 |
+---------+----------+-----------------+-------------------+----------------+------------+-------------+----------------+---------------+--------------------+-----------------+------------------+
5 rows in set (0.00 sec)

mysql> 

table_fragments
The table_fragments table provides information about the fragmentation, partitioning, distribution, and (internal) replication of NDB tables.
此方のテーブルでは、NDBテーブルのフラグメンテーション、パーティション、ディストリビューション、レプリケーションを確認する事が可能です。

mysql> select * from table_fragments limit 5;
+---------+----------+--------------+-------------+-----------------+-------------+----------------+-----------------+-------------------+----------------------+-----------------------+----------------------+--------------------+-------------------+------------------+
| node_id | table_id | partition_id | fragment_id | partition_order | log_part_id | no_of_replicas | current_primary | preferred_primary | current_first_backup | current_second_backup | current_third_backup | num_alive_replicas | num_dead_replicas | num_lcp_replicas |
+---------+----------+--------------+-------------+-----------------+-------------+----------------+-----------------+-------------------+----------------------+-----------------------+----------------------+--------------------+-------------------+------------------+
|       1 |        2 |   4294967295 |           0 |               0 |           0 |              2 |               1 |                 1 |                    2 |                     0 |                    0 |                  2 |                 0 |                0 |
|       1 |        2 |   4294967295 |           1 |               0 |           0 |              2 |               2 |                 2 |                    1 |                     0 |                    0 |                  2 |                 0 |                0 |
|       1 |        3 |   4294967295 |           0 |               0 |           1 |              2 |               1 |                 1 |                    2 |                     0 |                    0 |                  2 |                 0 |                0 |
|       1 |        3 |   4294967295 |           1 |               0 |           1 |              2 |               2 |                 2 |                    1 |                     0 |                    0 |                  2 |                 0 |                0 |
|       1 |       11 |   4294967295 |           0 |               0 |           3 |              2 |               1 |                 1 |                    2 |                     0 |                    0 |                  2 |                 0 |                0 |
+---------+----------+--------------+-------------+-----------------+-------------+----------------+-----------------+-------------------+----------------------+-----------------------+----------------------+--------------------+-------------------+------------------+
5 rows in set (0.00 sec)

mysql> 

table_info
The table_info table provides information about logging, checkpointing, distribution, and storage options in effect for individual NDB tables.
こちらのテーブルでは、各NDBテーブルのログ設定、チェックポイント、ディストリビューション、ストレージオプション等を確認する事が可能です。

mysql> select * from  table_info limit 5;
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
| table_id | logged_table | row_contains_gci | row_contains_checksum | read_backup | fully_replicated | storage_type | hashmap_id | partition_balance | create_gci |
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
|       31 |            1 |                1 |                     1 |           0 |                0 | MEMORY       |          1 | FOR_RP_BY_LDM     |          0 |
|       12 |            1 |                1 |                     1 |           0 |                0 | DISK         |          1 | FOR_RP_BY_LDM     |          0 |
|       82 |            1 |                1 |                     1 |           0 |                0 | MEMORY       |          1 | FOR_RP_BY_LDM     |          0 |
|       13 |            1 |                1 |                     1 |           0 |                0 | MEMORY       |          1 | FOR_RP_BY_LDM     |          0 |
|        3 |            1 |                1 |                     1 |           0 |                0 | MEMORY       |          1 | FOR_RP_BY_LDM     |          0 |
+----------+--------------+------------------+-----------------------+-------------+------------------+--------------+------------+-------------------+------------+
5 rows in set (0.01 sec)

mysql> 

table_replicas
The table_replicas table provides information about the copying, distribution, and checkpointing of NDB table fragments and fragment replicas.
こちらのテーブルでは、NDBテーブルフラグメントとレプリカのコピー、ディストリビューション、チェックポイントの情報を確認する事が可能です。

mysql> select * from table_replicas limit 5;
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
| node_id | table_id | fragment_id | initial_gci | replica_node_id | is_lcp_ongoing | num_crashed_replicas | last_max_gci_started | last_max_gci_completed | last_lcp_id | prev_lcp_id | prev_max_gci_started | prev_max_gci_completed | last_create_gci | last_replica_gci | is_replica_alive |
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
|       1 |        2 |           0 |           2 |               1 |              0 |                    0 |                60743 |                  60743 |          35 |       57834 |                57834 |                     34 |           57834 |       4294967295 |                1 |
|       1 |        2 |           0 |           2 |               2 |              0 |                    0 |                60743 |                  60743 |          35 |       57834 |                57834 |                     34 |           57834 |       4294967295 |                1 |
|       1 |        2 |           1 |           2 |               1 |              0 |                    0 |                60743 |                  60743 |          35 |       57834 |                57834 |                     34 |           57834 |       4294967295 |                1 |
|       1 |        2 |           1 |           2 |               2 |              0 |                    0 |                60743 |                  60743 |          35 |       57834 |                57834 |                     34 |           57834 |       4294967295 |                1 |
|       1 |        3 |           0 |           2 |               1 |              0 |                    0 |                60743 |                  60743 |          35 |       57834 |                57834 |                     34 |           57834 |       4294967295 |                1 |
+---------+----------+-------------+-------------+-----------------+----------------+----------------------+----------------------+------------------------+-------------+-------------+----------------------+------------------------+-----------------+------------------+------------------+
5 rows in set (0.00 sec)

mysql> 

これらの追加機能やテーブルを活用して、更にMSQL Clusterを活用するケースが増えればと思います。

参考: https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new.html

補足:アップグレードに再度パフォーマンス検証(MySQL Cluster 7.5.4 + Sysbench 0.5)
READ_BACKUP=0
185.78 per sec

ALTER TABLE sbtest1 COMMENT="NDB_TABLE=READ_BACKUP=0 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
ALTER TABLE sbtest2 COMMENT="NDB_TABLE=READ_BACKUP=0 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
ALTER TABLE sbtest3 COMMENT="NDB_TABLE=READ_BACKUP=0 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
ALTER TABLE sbtest4 COMMENT="NDB_TABLE=READ_BACKUP=0 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            156310
        write:                           0
        other:                           22330
        total:                           178640
    transactions:                        11165  (185.78 per sec.)
    read/write requests:                 156310 (2600.95 per sec.)
    other operations:                    22330  (371.56 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.0973s
    total number of events:              11165
    total time taken by event execution: 1921.4885s
    response time:
         min:                                 38.13ms
         avg:                                172.10ms
         max:                                390.91ms
         approx.  95 percentile:             243.58ms

Threads fairness:
    events (avg/stddev):           348.9062/3.30
    execution time (avg/stddev):   60.0465/0.02

READ_BACKUP=1
240.78 per sec.

ALTER TABLE sbtest1 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
ALTER TABLE sbtest2 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
ALTER TABLE sbtest3 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
ALTER TABLE sbtest4 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            202482
        write:                           0
        other:                           28926
        total:                           231408
    transactions:                        14463  (240.78 per sec.)
    read/write requests:                 202482 (3370.96 per sec.)
    other operations:                    28926  (481.57 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.0666s
    total number of events:              14463
    total time taken by event execution: 1919.6420s
    response time:
         min:                                 66.34ms
         avg:                                132.73ms
         max:                                500.21ms
         approx.  95 percentile:             183.90ms

Threads fairness:
    events (avg/stddev):           451.9688/3.86
    execution time (avg/stddev):   59.9888/0.04

[root@CL-SLAVE01 sys03]# 

MySQL Cluster7.5からPK参照以外の参照性能が向上している。
テーブル作成時にREAD_BACKUPオプションを利用するか、ndb_read_backupオプションを設定しておくとPRIMARYレプリカだけでなく、SECONDARYレプリカからもデータが参照する事が出来るようになる。
MySQL7.4までは常に、PRIMARYレプリカからデータを参照していたので、ローカルにPRIMARYデータが無い場合は、PRIMARYデータを持っているノードまで取得しにいく必要があった。

イメージ

cluster

参照:
14.1.18.7 Setting NDB_TABLE options in table comments

抜粋: 
READ_BACKUP: Setting this option to 1 has the same effect as though ndb_read_backup were enabled; enables reading from any replica.
Setting this option to 1 automatically sets FRAGMENT_COUNT_TYPE to ONE_PER_LDM_PER_NODE_GROUP (see next item).
Starting with MySQL Cluster NDB 7.5.3, you can set READ_BACKUP for an existing table online,
using an ALTER TABLE statement similar to one of those shown here:


ALTER TABLE ... ALGORITHM=INPLACE, COMMENT="NDB_TABLE=READ_BACKUP=1";
ALTER TABLE ... ALGORITHM=INPLACE, COMMENT="NDB_TABLE=READ_BACKUP=0";

【結論】
結果としては、READ_BACKUPをONにした方が、3割程パフォーマンスが向上していました。
非常に非力な、仮想環境での検証なので皆さんの環境でも是非検証してみて下さい。
大幅にパフォーマンスが改善する可能性があります。

READ_BACKUP=0 (OFF)
transactions: 5650 (93.91 per sec.)
transactions: 5718 (94.91 per sec.)
transactions: 5698 (94.71 per sec.)
transactions: 5490 (91.24 per sec.)

READ_BACKUP=1 (ON)
transactions: 7234 (120.17 per sec.)
transactions: 7403 (123.00 per sec.)
transactions: 7419 (123.32 per sec.)
transactions: 7264 (120.77 per sec.)

※ マシーン自体は非力なのでTPSは少ないですが、どちらも全く同じ状況で検証しています。

■ 簡単にSYSBENCH0.5のOLTP READで、参照パフォーマンスの確認を行ってみました。
メモリーが無いので、データは1万件しかいれてません。(1万 X 4テーブル)


mysql> select @@version;
+----------------------------------+
| @@version                        |
+----------------------------------+
| 5.7.13-ndb-7.5.3-cluster-gpl-log |
+----------------------------------+
1 row in set (0.00 sec)

mysql> show tables;
+--------------------+
| Tables_in_sysbench |
+--------------------+
| sbtest1            |
| sbtest2            |
| sbtest3            |
| sbtest4            |
+--------------------+
4 rows in set (0.00 sec)

mysql> select count(*) from sbtest1;
+----------+
| count(*) |
+----------+
|    10000 |
+----------+
1 row in set (0.00 sec)

mysql> 

SYSBENCHのスレッド数と実行しているQUERY
‐ 32スレッドで60秒程実行しています。 
‐ Queryの殆どは、BETWEEN等を利用しているのでPKで特定のデータをピンポイントで持ってくる処理ではありません。


/bin/sysbench \
  --test=../lua/db/oltp.lua \
  --rand-init=on \
  --db-driver=mysql \
  --oltp-table-size=${TSIZE} \
  --rand-type=uniform \
  --oltp-read-only=on \
  --oltp-tables-count=${NTBLE}\
  --mysql-db=sysbench \
  --mysql-host=${ENDPOINT} \
  --mysql-user=bench_user \
  --mysql-password=password \
  --max-time=60 \
  --max-requests=0 \
  --num-threads=32 \




[root@CL-SLAVE01 sys03]# cat ../lua/db/oltp.lua | egrep -i select 
   for i=1, oltp_point_selects do
      rs = db_query("SELECT c FROM ".. table_name .." WHERE id=" .. sb_rand(1, oltp_table_size))
      rs = db_query("SELECT c FROM ".. table_name .." WHERE id BETWEEN " .. range_start .. " AND " .. range_start .. "+" .. oltp_range_size - 1)
      rs = db_query("SELECT SUM(K) FROM ".. table_name .." WHERE id BETWEEN " .. range_start .. " AND " .. range_start .. "+" .. oltp_range_size - 1)
      rs = db_query("SELECT c FROM ".. table_name .." WHERE id BETWEEN " .. range_start .. " AND " .. range_start .. "+" .. oltp_range_size - 1 .. " ORDER BY c")
      rs = db_query("SELECT DISTINCT c FROM ".. table_name .." WHERE id BETWEEN " .. range_start .. " AND " .. range_start .. "+" .. oltp_range_size - 1 .. " ORDER BY c")
[root@CL-SLAVE01 sys03]# 

上記のテーブルとデータでDEFAULTの状態(READ_BACKUPをOFF)で検証してみます。

[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            79100
        write:                           0
        other:                           11300
        total:                           90400
    transactions:                        5650   (93.91 per sec.)
    read/write requests:                 79100  (1314.76 per sec.)
    other operations:                    11300  (187.82 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.1630s
    total number of events:              5650
    total time taken by event execution: 1919.4297s
    response time:
         min:                                 89.72ms
         avg:                                339.72ms
         max:                                617.21ms
         approx.  95 percentile:             442.32ms

Threads fairness:
    events (avg/stddev):           176.5625/2.45
    execution time (avg/stddev):   59.9822/0.11

[root@CL-SLAVE01 sys03]# 




[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            80052
        write:                           0
        other:                           11436
        total:                           91488
    transactions:                        5718   (94.91 per sec.)
    read/write requests:                 80052  (1328.77 per sec.)
    other operations:                    11436  (189.82 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.2452s
    total number of events:              5718
    total time taken by event execution: 1924.6034s
    response time:
         min:                                161.28ms
         avg:                                336.59ms
         max:                                646.96ms
         approx.  95 percentile:             441.26ms

Threads fairness:
    events (avg/stddev):           178.6875/2.28
    execution time (avg/stddev):   60.1439/0.07

[root@CL-SLAVE01 sys03]# 

READ_BACKUPをONにしています。ALTERテーブルでテーブル毎に設定変更可能です。


mysql> ALTER TABLE sbtest1 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.11 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest2 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.12 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest3 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.10 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest4 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.20 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> 

READ_BACKUPオプションをONにしたので、同じテストを実行してみます。


[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            101276
        write:                           0
        other:                           14468
        total:                           115744
    transactions:                        7234   (120.17 per sec.)
    read/write requests:                 101276 (1682.33 per sec.)
    other operations:                    14468  (240.33 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.1997s
    total number of events:              7234
    total time taken by event execution: 1919.6510s
    response time:
         min:                                 61.99ms
         avg:                                265.37ms
         max:                                515.43ms
         approx.  95 percentile:             350.01ms

Threads fairness:
    events (avg/stddev):           226.0625/0.97
    execution time (avg/stddev):   59.9891/0.10

[root@CL-SLAVE01 sys03]# 



[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            103642
        write:                           0
        other:                           14806
        total:                           118448
    transactions:                        7403   (123.00 per sec.)
    read/write requests:                 103642 (1722.05 per sec.)
    other operations:                    14806  (246.01 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.1852s
    total number of events:              7403
    total time taken by event execution: 1923.2176s
    response time:
         min:                                143.96ms
         avg:                                259.79ms
         max:                                421.40ms
         approx.  95 percentile:             328.68ms

Threads fairness:
    events (avg/stddev):           231.3438/0.59
    execution time (avg/stddev):   60.1006/0.05

[root@CL-SLAVE01 sys03]# 

■ 再テストでREAD_BACKUPをOFFにしてみます。


mysql> ALTER TABLE sbtest1 COMMENT="NDB_TABLE=READ_BACKUP=0 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.09 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest2 COMMENT="NDB_TABLE=READ_BACKUP=0 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.10 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest3 COMMENT="NDB_TABLE=READ_BACKUP=0 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.11 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest4 COMMENT="NDB_TABLE=READ_BACKUP=0 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.21 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> 

READ_BACKUPをOFFにした状態で再度検証してみると、TPSは落ちています。

[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            79772
        write:                           0
        other:                           11396
        total:                           91168
    transactions:                        5698   (94.71 per sec.)
    read/write requests:                 79772  (1325.97 per sec.)
    other operations:                    11396  (189.42 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.1611s
    total number of events:              5698
    total time taken by event execution: 1920.7135s
    response time:
         min:                                118.55ms
         avg:                                337.09ms
         max:                                600.45ms
         approx.  95 percentile:             440.47ms

Threads fairness:
    events (avg/stddev):           178.0625/1.71
    execution time (avg/stddev):   60.0223/0.09

[root@CL-SLAVE01 sys03]# 


[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            76860
        write:                           0
        other:                           10980
        total:                           87840
    transactions:                        5490   (91.24 per sec.)
    read/write requests:                 76860  (1277.31 per sec.)
    other operations:                    10980  (182.47 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.1734s
    total number of events:              5490
    total time taken by event execution: 1922.5091s
    response time:
         min:                                171.24ms
         avg:                                350.18ms
         max:                                801.92ms
         approx.  95 percentile:             478.98ms

Threads fairness:
    events (avg/stddev):           171.5625/1.32
    execution time (avg/stddev):   60.0784/0.06

[root@CL-SLAVE01 sys03]# 

READ_BACKUP設定を再度ONにしています。


mysql> ALTER TABLE sbtest1 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.20 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest2 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.20 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest3 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.10 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE sbtest4 COMMENT="NDB_TABLE=READ_BACKUP=1 NDB_TABLE=PARTITION_BALANCE=FOR_RA_BY_LDM";
Query OK, 0 rows affected (0.16 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> 

もう一度、READ_BACKUPをONにしてパフォーマンスを確認してみました。
やはり、ONにした方が今回の環境ではパフォーマンスが良いようです。

[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            103866
        write:                           0
        other:                           14838
        total:                           118704
    transactions:                        7419   (123.32 per sec.)
    read/write requests:                 103866 (1726.47 per sec.)
    other operations:                    14838  (246.64 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.1609s
    total number of events:              7419
    total time taken by event execution: 1920.0195s
    response time:
         min:                                 91.51ms
         avg:                                258.80ms
         max:                                463.14ms
         approx.  95 percentile:             351.79ms

Threads fairness:
    events (avg/stddev):           231.8438/0.83
    execution time (avg/stddev):   60.0006/0.13

[root@CL-SLAVE01 sys03]#


[root@CL-SLAVE01 sys03]# ../oltp_test_read_only 
sysbench 0.5:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 32
Initializing random number generator from timer.

Random number generator seed is 0 and will be ignored


Threads started!

OLTP test statistics:
    queries performed:
        read:                            101696
        write:                           0
        other:                           14528
        total:                           116224
    transactions:                        7264   (120.77 per sec.)
    read/write requests:                 101696 (1690.77 per sec.)
    other operations:                    14528  (241.54 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.1476s
    total number of events:              7264
    total time taken by event execution: 1921.1800s
    response time:
         min:                                 77.60ms
         avg:                                264.48ms
         max:                                454.03ms
         approx.  95 percentile:             343.88ms

Threads fairness:
    events (avg/stddev):           227.0000/0.79
    execution time (avg/stddev):   60.0369/0.06

[root@CL-SLAVE01 sys03]# 

MySQL Cluster 7.5はMySQL5.7ベースのMySQLが利用可能なので、JSONが利用出来たり色々な改善が加わっています。
これまでより、多くのケースで活用出来る場面が増えてくるかと思います。詳細は以下のURLを参照下さい。
19.1.4 What is New in MySQL Cluster NDB 7.5

例) MySQL Cluster7.5のndbinfoから,こちらのようにテーブルの情報も確認出来るようになってます。


mysql> SELECT  p.param_name AS Name,
    ->         v.node_id AS Node,
    ->         p.param_type AS Type,
    ->         p.param_default AS 'Default',
    ->         p.param_min AS Minimum,
    ->         p.param_max AS Maximum,
    ->         CASE p.param_mandatory WHEN 1 THEN 'Y' ELSE 'N' END AS 'Required',
    ->         v.config_value AS Current
    -> FROM    config_params p
    -> JOIN    config_values v
    -> ON      p.param_number = v.config_param
    -> WHERE   p. param_name IN ('NodeId', 'HostName','DataMemory', 'IndexMemory');
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
| Name        | Node | Type     | Default   | Minimum | Maximum       | Required | Current        |
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
| NodeId      |    1 | unsigned |           | 1       | 48            | Y        | 1              |
| HostName    |    1 | string   | localhost |         |               | N        | 192.168.56.114 |
| DataMemory  |    1 | unsigned | 83886080  | 1048576 | 1099511627776 | N        | 134217728      |
| IndexMemory |    1 | unsigned | 18874368  | 1048576 | 1099511627776 | N        | 68157440       |
| NodeId      |    2 | unsigned |           | 1       | 48            | Y        | 2              |
| HostName    |    2 | string   | localhost |         |               | N        | 192.168.56.115 |
| DataMemory  |    2 | unsigned | 83886080  | 1048576 | 1099511627776 | N        | 134217728      |
| IndexMemory |    2 | unsigned | 18874368  | 1048576 | 1099511627776 | N        | 68157440       |
+-------------+------+----------+-----------+---------+---------------+----------+----------------+
8 rows in set (0.09 sec)

mysql> 

MySQL Clusterに関しても、セミナーで紹介していたりするので都合が付けば是非参加下さい。
https://www-jp.mysql.com/news-and-events/events/