Vandana Ayyalasomayajula created HBASE-13376:
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Summary: Improvements to Stochastic load balancer
Key: HBASE-13376
URL: https://issues.apache.org/jira/browse/HBASE-13376
Project: HBase
Issue Type: Improvement
Components: Balancer
Affects Versions: 0.98.12, 1.0.0
Reporter: Vandana Ayyalasomayajula
Assignee: Vandana Ayyalasomayajula
Priority: Minor
There are two things this jira tries to address:
1. The locality picker in the stochastic balancer does not pick regions with
least locality as candidates for swap/move. So when any user configures
locality cost in the configs, the balancer does not always seems to move
regions with bad locality.
2. When a cluster has equal number of loaded regions, it always picks the first
one. It should pick a random region on one of the equally loaded servers. This
improves a chance of finding a good candidate, when load picker is invoked
several times.
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