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https://issues.apache.org/jira/browse/HBASE-5959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276280#comment-13276280
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Zhihong Yu edited comment on HBASE-5959 at 5/15/12 10:21 PM:
-------------------------------------------------------------
I was looking for output in master log similar to the following:
{code}
LOG.info("Done. Calculated a load balance in " + (endTime-startTime) + "ms.
" +
"Moving " + totalNumMoved + " regions off of " +
serversOverloaded + " overloaded servers onto " +
serversUnderloaded + " less loaded servers. regions to return:" +
regionsToReturn.size());
{code}
w.r.t. maxSteps, is it possible to deduce the maximum time allowable in one
round of stochastic balancing ?
Currently we have (in HMaster.balance()):
{code}
int maximumBalanceTime = getBalancerCutoffTime();
long cutoffTime = System.currentTimeMillis() + maximumBalanceTime;
{code}
I am thinking of the following:
{code}
int maxPlanGenerationTime = maximumBalanceTime *
// the maximum percentage for planning region rebalance
getConfiguration().getInt("hbase.balancer.max.planning.percent", 30) / 100;
...
List<RegionPlan> partialPlans =
this.balancer.balanceCluster(assignments,
maxPlanGenerationTime);
{code}
was (Author: zhi...@ebaysf.com):
I was looking for output in master log similar to the following:
{code}
LOG.info("Done. Calculated a load balance in " + (endTime-startTime) + "ms.
" +
"Moving " + totalNumMoved + " regions off of " +
serversOverloaded + " overloaded servers onto " +
serversUnderloaded + " less loaded servers. regions to return:" +
regionsToReturn.size());
{code}
w.r.t. maxSteps, is it possible to deduce the maximum time allowable in one
round of stochastic balancing ?
Currently we have (in HMaster.balance()):
{code}
int maximumBalanceTime = getBalancerCutoffTime();
long cutoffTime = System.currentTimeMillis() + maximumBalanceTime;
{code}
I am thinking of the following:
{code}
int maxPlanGenerationTime = maximumBalanceTime *
// the maximum percentage for planning region rebalance
getConfiguration().getInt("hbase.balancer.max.planning.percent", 30) / 100;
...
List<RegionPlan> partialPlans =
this.balancer.balanceCluster(assignments,
this.assignmentManager.getTableInitRegions(),
maxPlanGenerationTime);
{code}
> Add other load balancers
> ------------------------
>
> Key: HBASE-5959
> URL: https://issues.apache.org/jira/browse/HBASE-5959
> Project: HBase
> Issue Type: New Feature
> Components: master
> Affects Versions: 0.96.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Attachments: HBASE-5959-0.patch, HBASE-5959-1.patch,
> HBASE-5959-2.patch, HBASE-5959-3.patch, HBASE-5959-6.patch,
> HBASE-5959-7.patch, HBASE-5959.D3189.1.patch, HBASE-5959.D3189.2.patch,
> HBASE-5959.D3189.3.patch, HBASE-5959.D3189.4.patch
>
>
> Now that balancers are pluggable we should give some options.b
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