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https://issues.apache.org/jira/browse/HBASE-15529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guanghao Zhang updated HBASE-15529:
-----------------------------------
Description:
StochasticLoadBalancer includes cost functions to compute the cost of region
rount, r/w qps, table load, region locality, memstore size, and storefile size.
Every cost function returns a number between 0 and 1 inclusive and the computed
costs are scaled by their respective multipliers. The bigger multiplier means
that the respective cost function have the bigger weight. But needBalance
decide whether to balance only by region count and doesn't consider r/w qps,
locality even you config these cost function with bigger multiplier.
StochasticLoadBalancer should override needBalance and decide whether to
balance by it's configs of cost functions.
Add one new config hbase.master.balancer.stochastic.minCostNeedBalance, cluster
need balance when (total cost / sum multiplier) > minCostNeedBalance.
was:StochasticLoadBalancer includes cost functions to compute the cost of
region rount, r/w qps, table load, region locality, memstore size, and
storefile size. Every cost function returns a number between 0 and 1 inclusive
and the computed costs are scaled by their respective multipliers. The bigger
multiplier means that the respective cost function have the bigger weight. But
needBalance decide whether to balance only by region count and doesn't consider
r/w qps, locality even you config these cost function with bigger multiplier.
StochasticLoadBalancer should override needBalance and decide whether to
balance by it's configs of cost functions.
> Override needBalance in StochasticLoadBalancer
> ----------------------------------------------
>
> Key: HBASE-15529
> URL: https://issues.apache.org/jira/browse/HBASE-15529
> Project: HBase
> Issue Type: Improvement
> Reporter: Guanghao Zhang
> Priority: Minor
> Attachments: HBASE-15529.patch
>
>
> StochasticLoadBalancer includes cost functions to compute the cost of region
> rount, r/w qps, table load, region locality, memstore size, and storefile
> size. Every cost function returns a number between 0 and 1 inclusive and the
> computed costs are scaled by their respective multipliers. The bigger
> multiplier means that the respective cost function have the bigger weight.
> But needBalance decide whether to balance only by region count and doesn't
> consider r/w qps, locality even you config these cost function with bigger
> multiplier. StochasticLoadBalancer should override needBalance and decide
> whether to balance by it's configs of cost functions.
> Add one new config hbase.master.balancer.stochastic.minCostNeedBalance,
> cluster need balance when (total cost / sum multiplier) > minCostNeedBalance.
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