[HBASE-26337] Optimization for weighted random generators

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.5.0, 3.0.0-alpha-2, 2.4.9
• Component/s: Balancer
• Hadoop Flags: Reviewed
• Assignee: Clara Xiong
• Reporter: Clara Xiong
• Created: 07/Oct/21 22:45
• Updated: 12/Nov/21 02:35
• Resolved: 11/Nov/21 01:58

Description

Currently we use four move candidate generators and pick one randomly for every move with even probability, all with optimization associated with a certain group of cost functions. We can assign weight for the random picking of generators based on balancing pressure on each group. 

Issue Links

• is a child of: HBASE-25697 StochasticBalancer improvement for large scale clusters
• links to: GitHub Pull Request #3732
• links to: GitHub Pull Request #3827
• links to: GitHub Pull Request #3828
• links to: GitHub Pull Request #3829
• links to: Pull Request 3732