[KUDU-3061] Balance tablet leaders across TServers

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.11.1
• Component/s: api, tablet
• Labels: performance roadmap-candidate scalability
• Assignee: Yuqi Du
• Reporter: Adam Voga
• Created: 24/Feb/20 09:32
• Updated: 26/Oct/23 04:51

Description

The number of leader tablets per tablet server can become imbalanced over time, putting additional pressure on a few nodes.

A CLI tool or an extension to the existing balancer should be added to take care of this.

Currently the only option is running leader_step_down manually. 

Issue Links

• is related to: IMPALA-10481 Lack of TServer affinity in remote Kudu scans results in bad OS buffer cache behavior on tablet servers
• is related to: KUDU-886 Cluster load balancing
• is related to: KUDU-3147 Balance tablets based on range hash buckets
• relates to: KUDU-3390 add new feature auto leader rebalancer
• relates to: KUDU-2245 Leadership transfer (graceful step down)