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Posted to dev@hbase.apache.org by "Xiaolin Ha (Jira)" <ji...@apache.org> on 2021/04/02 07:00:00 UTC

[jira] [Created] (HBASE-25727) Support Read/Write request size cost functions in StochasticLoadBalancer

Xiaolin Ha created HBASE-25727:
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             Summary: Support Read/Write request size cost functions in StochasticLoadBalancer
                 Key: HBASE-25727
                 URL: https://issues.apache.org/jira/browse/HBASE-25727
             Project: HBase
          Issue Type: Improvement
          Components: Balancer
    Affects Versions: 1.4.13, 2.0.0, 3.0.0-alpha-1
            Reporter: Xiaolin Ha


Currently, StochasticLoadBalancer has several cost functions to reflect pressure of regions, they are Read/Write/CP RequestCostFunction, MemStoreSizeCostFunction, StoreFileCostFunction. Memstore and storefile cost functions are used to reflect the write io pressure. But when some regions has high read io pressures, balancer can not aware of it and then make some actions.

Like request count cost functions in StochasticLoadBalancer, we could also support request size cost functions. Because in some circumstances, request size  is the most important factor reflecting the pressure of RSes.



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