SingleStore DB

SHOW REBALANCE STATUS

Shows the status of the currently executing REBALANCE PARTITIONS, RESTORE REDUNDANCY, RESTORE, ATTACH LEAF, auto-failover or auto-attach operation on a database.

Syntax
SHOW REBALANCE STATUS ON db_name
Remarks
  • db_name - name of a SingleStore DB database.

  • This command must be run on the master aggregator node (see Node Requirements for SingleStore DB Commands ).

  • Alternatively, you can query the information schema view MV_REBALANCE_STATUS . The following query returns the same output as the SHOW REBALANCE STATUS ON db_name command:

    SELECT * FROM information_schema.MV_REBALANCE_STATUS
    WHERE database_name = 'db_name';
Example

Run the following command to rebalance partitions:

REBALANCE PARTITIONS ON mydb;

View the status of REBALANCE PARTITIONS while it is still running:

SHOW REBALANCE STATUS ON mydb;
****
+-----------------------------------+---------+-------------+-------------+-------+-----------+--------------+-----------------------------+
| Action                            | Ordinal | Target_Host | Target_Port | Phase | Status    | Running_Time | Estimated_Time_Remaining_Ms |
+-----------------------------------+---------+-------------+-------------+-------+-----------+--------------+-----------------------------+
| COPY PARTITION                    | 13      | 127.0.0.1   | 10002       | 3     | success   | 4009         | 0                           |
| COPY PARTITION                    | 2       | 127.0.0.1   | 10003       | 4     | success   | 5109         | 0                           |
| COPY PARTITION                    | 2       | 127.0.0.1   | 10004       | 4     | success   | 5112         | 0                           |
| PROMOTE PARTITION WITH DROP FORCE | 2       | 127.0.0.1   | 10003       | 5     | running   | 405          | 1130                        |
| DROP PARTITION                    | 2       | 127.0.0.1   | 10002       | 6     | scheduled | NULL         | 1002                        |
| DROP PARTITION                    | 13      | 127.0.0.1   | 10004       | 6     | scheduled | NULL         | 1002                        |
+-----------------------------------+---------+-------------+-------------+-------+-----------+--------------+-----------------------------+

Note: The Status displays success for the activities that are already complete. The Estimated_Time_Remaining_Ms displays the estimated remaining time (in milliseconds) for each low-level command to complete.