[ASTERIXDB-1985] Add a rebalance callback for customizing the pre/post action for rebalance

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: CLUS - Cluster management
• Assignee: Yingyi Bu
• Reporter: Yingyi Bu
• Created: 13/Jul/17 18:30
• Updated: 14/Jul/17 01:50
• Resolved: 14/Jul/17 01:50

Description

Add a rebalance callback for customizing the pre/post action for populating data from the source to the target.

For example, populating LSM metadata from the source to the target is sometimes necessary.