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Storage load balance

You can use the BALANCE statement to balance the distribution of partitions and Raft leaders, or clear some Storage servers for easy maintenance. For details, see BALANCE.

Legacy version compatibility

The BALANCE DATA commands are not supported.

Balance leader distribution

To balance the raft leaders, run BALANCE LEADER.

Example

nebula> BALANCE LEADER;

Run SHOW HOSTS to check the balance result.

nebula> SHOW HOSTS;
+------------------+------+----------+--------------+-----------------------------------+------------------------+---------+
| Host             | Port | Status   | Leader count | Leader distribution               | Partition distribution | Version |
+------------------+------+----------+--------------+-----------------------------------+------------------------+---------+
| "192.168.10.100" | 9779 | "ONLINE" | 4            | "basketballplayer:3"              | "basketballplayer:8"   | "3.0.1" |
| "192.168.10.101" | 9779 | "ONLINE" | 8            | "basketballplayer:3"              | "basketballplayer:8"   | "3.0.1" |
| "192.168.10.102" | 9779 | "ONLINE" | 3            | "basketballplayer:3"              | "basketballplayer:8"   | "3.0.1" |
| "192.168.10.103" | 9779 | "ONLINE" | 0            | "basketballplayer:2"              | "basketballplayer:7"   | "3.0.1" |
| "192.168.10.104" | 9779 | "ONLINE" | 0            | "basketballplayer:2"              | "basketballplayer:7"   | "3.0.1" |
| "192.168.10.105" | 9779 | "ONLINE" | 0            | "basketballplayer:2"              | "basketballplayer:7"   | "3.0.1" |
+------------------+------+----------+--------------+-----------------------------------+------------------------+---------+

Caution

In NebulaGraph 3.0.2, switching leaders will cause a large number of short-term request errors (Storage Error E_RPC_FAILURE). For solutions, see FAQ.

Last update: March 13, 2023
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