[HBASE-26177] Add support to run balancer overriding current config

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Balancer
• Assignee: Unassigned
• Reporter: Clara Xiong
• Created: 05/Aug/21 19:41
• Updated: 09/Sep/21 22:11

Description

At times we want a one-time run for balancer with specific aggressive configs such as recovering from a failure of half cluster. Currently some config are loaded dynamically but some don't. And it could be error prone when we try to restore the configs.

With a dry run feature coming, we want to let user run a dry run with the overriding config to choose the config and then run it. The implementation becomes more straightforward if we allow overidding configs for both config and actual runs.

Issue Links

• is a child of: HBASE-25697 StochasticBalancer improvement for large scale clusters
• is related to: HBASE-26147 Add dry run mode to hbase balancer

Sub-Tasks

• Add support for reloading balancer configs with BalanceRequest: Open