rebalanceChunksAmongDataNodes

Syntax

rebalanceChunksAmongDataNodes([exec = false])

Arguments

exec is a Boolean value indicating whether to initiate data rebalancing among data nodes. The default value is false indicating that data rebalancing will not be initiated.

Details

This function is used to rebalance data among data nodes for optimal performance after one or more data nodes are added to a DolphinDB cluster. It can only be executed on a controller by an administrator.

Return a table containing the following columns:

name	meaning
chunkId	the chunk ID
srcNode	alias of source node
destNode	alias of destination node

You can get the status of recovery tasks by getRecoveryTaskStatus on a controller.

Example

$ rebalanceChunksAmongDataNodes()

ChunkId	srcNode	destNode
99279094-ca12-3b87-48b6-520cbb986f39	node1	node2
45f612b8-42f5-aebd-4cef-e522b6ae1fc8	node1	node2