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本文介绍如何通过修改 Primary Zone，达到租户扩容的功能。
增加 Primary Zone
使用 root 用户登录到集群的 sys 租户。
obclient -h172.30.xxx.xxx -P2883 -uroot@sys -pxxxx -A进入
oceanbase数据库。obclient>use oceanbase;查询租户
mq_t1的基本信息，例如locality、primary zone等属性。obclient> SELECT * FROM oceanbase.DBA_OB_TENANTS WHERE tenant_id = 1004; +-----------+-------------+-------------+----------------------------+----------------------------+----------------------------------------+------------------------------------------------------------------+-------------------+--------------------+--------+---------------+--------+ | TENANT_ID | TENANT_NAME | TENANT_TYPE | CREATE_TIME | MODIFY_TIME | PRIMARY_ZONE | LOCALITY | PREVIOUS_LOCALITY | COMPATIBILITY_MODE | STATUS | IN_RECYCLEBIN | LOCKED | +-----------+-------------+-------------+----------------------------+----------------------------+----------------------------------------+------------------------------------------------------------------+-------------------+--------------------+--------+---------------+--------+ | 1004 | mq_t1 | USER | 2023-01-04 18:32:08.212745 | 2023-01-04 18:32:33.343667 | sa128_obv4_1;sa128_obv4_2,sa128_obv4_3 | FULL{1}@sa128_obv4_1, FULL{1}@sa128_obv4_2, FULL{1}@sa128_obv4_3 | NULL | MYSQL | NORMAL | NO | NO | +-----------+-------------+-------------+----------------------------+----------------------------+----------------------------------------+------------------------------------------------------------------+-------------------+--------------------+--------+---------------+--------+ 1 row in set查询租户
mq_t1的 Unit 信息，在单个 Zone 的unit num为 2。obclient> SELECT * FROM oceanbase.DBA_OB_UNITS WHERE tenant_id = 1004; +---------+-----------+--------+------------------+---------------+----------------------------+----------------------------+--------------+-------------+----------+---------------------+-----------------------+----------------+----------------+---------+---------+-------------+---------------+----------+----------+-------------+ | UNIT_ID | TENANT_ID | STATUS | RESOURCE_POOL_ID | UNIT_GROUP_ID | CREATE_TIME | MODIFY_TIME | ZONE | SVR_IP | SVR_PORT | MIGRATE_FROM_SVR_IP | MIGRATE_FROM_SVR_PORT | MANUAL_MIGRATE | UNIT_CONFIG_ID | MAX_CPU | MIN_CPU | MEMORY_SIZE | LOG_DISK_SIZE | MAX_IOPS | MIN_IOPS | IOPS_WEIGHT | +---------+-----------+--------+------------------+---------------+----------------------------+----------------------------+--------------+-------------+----------+---------------------+-----------------------+----------------+----------------+---------+---------+-------------+---------------+----------+----------+-------------+ | 1004 | 1004 | ACTIVE | 1005 | 1003 | 2023-01-04 11:48:36.582413 | 2023-01-04 18:32:08.215935 | sa128_obv4_1 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1005 | 1004 | ACTIVE | 1005 | 1003 | 2023-01-04 11:48:36.591414 | 2023-01-04 18:32:08.215935 | sa128_obv4_2 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1006 | 1004 | ACTIVE | 1005 | 1003 | 2023-01-04 14:13:36.980799 | 2023-01-04 18:32:08.217005 | sa128_obv4_3 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1007 | 1004 | ACTIVE | 1005 | 1004 | 2023-01-04 23:50:57.989966 | 2023-01-04 23:50:57.989966 | sa128_obv4_1 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1008 | 1004 | ACTIVE | 1005 | 1004 | 2023-01-04 23:50:57.995273 | 2023-01-04 23:50:57.995273 | sa128_obv4_2 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1009 | 1004 | ACTIVE | 1005 | 1004 | 2023-01-04 23:50:57.997360 | 2023-01-04 23:50:57.997360 | sa128_obv4_3 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | +---------+-----------+--------+------------------+---------------+----------------------------+----------------------------+--------------+-------------+----------+---------------------+-----------------------+----------------+----------------+---------+---------+-------------+---------------+----------+----------+-------------+ 6 rows in set查询租户
mq_t1的日志流信息，对应unit num为 2 和primary zone为 1，因此日志流个数为 2。obclient> SELECT * FROM oceanbase.CDB_OB_LS WHERE tenant_id = 1004; +-----------+-------+--------+----------------------------------------+---------------+-------------+---------------------+----------+---------------------+---------------------+ | TENANT_ID | LS_ID | STATUS | PRIMARY_ZONE | UNIT_GROUP_ID | LS_GROUP_ID | CREATE_SCN | DROP_SCN | SYNC_SCN | READABLE_SCN | +-----------+-------+--------+----------------------------------------+---------------+-------------+---------------------+----------+---------------------+---------------------+ | 1004 | 1 | NORMAL | sa128_obv4_1;sa128_obv4_2,sa128_obv4_3 | 0 | 0 | NULL | NULL | 1672847476919847432 | 1672847476694110593 | | 1004 | 1001 | NORMAL | sa128_obv4_1;sa128_obv4_2,sa128_obv4_3 | 1003 | 1001 | 1672828353411747395 | NULL | 1672847481926946171 | 1672847481725653432 | | 1004 | 1002 | NORMAL | sa128_obv4_1;sa128_obv4_2,sa128_obv4_3 | 1004 | 1002 | 1672847466822734122 | NULL | 1672847481906918109 | 1672847481705364375 | +-----------+-------+--------+----------------------------------------+---------------+-------------+---------------------+----------+---------------------+---------------------+ 3 rows in set修改租户
mq_t1的PRIMARY_ZONE属性，从 1 调整为 2 。obclient> ALTER TENANT mq_t1 PRIMARY_ZONE='sa128_obv4_1,sa128_obv4_2;sa128_obv4_3';查询租户
mq_t1的基本信息，确认PRIMARY_ZONE属性修改成功，由sa128_obv4_1变更为sa128_obv4_1,sa128_obv4_2。obclient> SELECT * FROM oceanbase.DBA_OB_TENANTS WHERE tenant_id = 1004; +-----------+-------------+-------------+----------------------------+----------------------------+----------------------------------------+------------------------------------------------------------------+-------------------+--------------------+--------+---------------+--------+ | TENANT_ID | TENANT_NAME | TENANT_TYPE | CREATE_TIME | MODIFY_TIME | PRIMARY_ZONE | LOCALITY | PREVIOUS_LOCALITY | COMPATIBILITY_MODE | STATUS | IN_RECYCLEBIN | LOCKED | +-----------+-------------+-------------+----------------------------+----------------------------+----------------------------------------+------------------------------------------------------------------+-------------------+--------------------+--------+---------------+--------+ | 1004 | mq_t1 | USER | 2023-01-04 18:32:08.212745 | 2023-01-04 23:58:49.632182 | sa128_obv4_1,sa128_obv4_2;sa128_obv4_3 | FULL{1}@sa128_obv4_1, FULL{1}@sa128_obv4_2, FULL{1}@sa128_obv4_3 | NULL | MYSQL | NORMAL | NO | NO | +-----------+-------------+-------------+----------------------------+----------------------------+----------------------------------------+------------------------------------------------------------------+-------------------+--------------------+--------+---------------+--------+ 1 row in set查询租户
mq_t1的 Unit 信息，变更前后unit num保持不变。obclient> SELECT * FROM oceanbase.DBA_OB_UNITS WHERE tenant_id = 1004; +---------+-----------+--------+------------------+---------------+----------------------------+----------------------------+--------------+-------------+----------+---------------------+-----------------------+----------------+----------------+---------+---------+-------------+---------------+----------+----------+-------------+ | UNIT_ID | TENANT_ID | STATUS | RESOURCE_POOL_ID | UNIT_GROUP_ID | CREATE_TIME | MODIFY_TIME | ZONE | SVR_IP | SVR_PORT | MIGRATE_FROM_SVR_IP | MIGRATE_FROM_SVR_PORT | MANUAL_MIGRATE | UNIT_CONFIG_ID | MAX_CPU | MIN_CPU | MEMORY_SIZE | LOG_DISK_SIZE | MAX_IOPS | MIN_IOPS | IOPS_WEIGHT | +---------+-----------+--------+------------------+---------------+----------------------------+----------------------------+--------------+-------------+----------+---------------------+-----------------------+----------------+----------------+---------+---------+-------------+---------------+----------+----------+-------------+ | 1004 | 1004 | ACTIVE | 1005 | 1003 | 2023-01-04 11:48:36.582413 | 2023-01-04 18:32:08.215935 | sa128_obv4_1 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1005 | 1004 | ACTIVE | 1005 | 1003 | 2023-01-04 11:48:36.591414 | 2023-01-04 18:32:08.215935 | sa128_obv4_2 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1006 | 1004 | ACTIVE | 1005 | 1003 | 2023-01-04 14:13:36.980799 | 2023-01-04 18:32:08.217005 | sa128_obv4_3 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1007 | 1004 | ACTIVE | 1005 | 1004 | 2023-01-04 23:50:57.989966 | 2023-01-04 23:50:57.989966 | sa128_obv4_1 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1008 | 1004 | ACTIVE | 1005 | 1004 | 2023-01-04 23:50:57.995273 | 2023-01-04 23:50:57.995273 | sa128_obv4_2 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | | 1009 | 1004 | ACTIVE | 1005 | 1004 | 2023-01-04 23:50:57.997360 | 2023-01-04 23:50:57.997360 | sa128_obv4_3 | xx.xx.xx.xx | 2882 | NULL | NULL | NULL | 1006 | 3 | 3 | 12884901888 | 38654705664 | 30000 | 30000 | 3 | +---------+-----------+--------+------------------+---------------+----------------------------+----------------------------+--------------+-------------+----------+---------------------+-----------------------+----------------+----------------+---------+---------+-------------+---------------+----------+----------+-------------+ 6 rows in set查询租户
mq_t1的日志流信息，变更前为 2，变更后为 4。obclient> SELECT * FROM oceanbase.CDB_OB_LS WHERE tenant_id = 1004; +-----------+-------+--------+----------------------------------------+---------------+-------------+---------------------+----------+---------------------+---------------------+ | TENANT_ID | LS_ID | STATUS | PRIMARY_ZONE | UNIT_GROUP_ID | LS_GROUP_ID | CREATE_SCN | DROP_SCN | SYNC_SCN | READABLE_SCN | +-----------+-------+--------+----------------------------------------+---------------+-------------+---------------------+----------+---------------------+---------------------+ | 1004 | 1 | NORMAL | sa128_obv4_1;sa128_obv4_2;sa128_obv4_3 | 0 | 0 | NULL | NULL | 1672847957666739465 | 1672847957458353706 | | 1004 | 1001 | NORMAL | sa128_obv4_1;sa128_obv4_2;sa128_obv4_3 | 1003 | 1001 | 1672828353411747395 | NULL | 1672847959672667216 | 1672847959571948499 | | 1004 | 1002 | NORMAL | sa128_obv4_1;sa128_obv4_2;sa128_obv4_3 | 1004 | 1002 | 1672847466822734122 | NULL | 1672847959641019952 | 1672847959540230639 | | 1004 | 1003 | NORMAL | sa128_obv4_2;sa128_obv4_1;sa128_obv4_3 | 1003 | 1001 | 1672847937481543793 | NULL | 1672847959561876069 | 1672847959461288966 | | 1004 | 1004 | NORMAL | sa128_obv4_2;sa128_obv4_1;sa128_obv4_3 | 1004 | 1002 | 1672847937561171512 | NULL | 1672847959675241289 | 1672847959574491818 | +-----------+-------+--------+----------------------------------------+---------------+-------------+---------------------+----------+---------------------+---------------------+ 5 rows in set
通过上述示例，将租户 mq_t1 的 Primary Zone 的 Zone 个数从 1 变更为 2。变更前租户在每个 Zone 的 Unit 个数为 2，对应的日志流个数为 2；变更后租户在每个 Zone 的 Unit 个数保持不变，但 Primary Zone 个数从 1 变更为 2，从而对应的日志流个数变更为 4。变更后租户的服务节点从 2 扩容为 4，从而实现了租户扩容。
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