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https://issues.apache.org/jira/browse/HBASE-22356?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang updated HBASE-22356:
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Fix Version/s: (was: 1.8.0)
(was: 2.5.0)
(was: 3.0.0-alpha-1)
> API to get hdfs block distribution from regionservers
> -----------------------------------------------------
>
> Key: HBASE-22356
> URL: https://issues.apache.org/jira/browse/HBASE-22356
> Project: HBase
> Issue Type: Sub-task
> Components: API, Balancer, regionserver
> Reporter: Thiruvel Thirumoolan
> Assignee: Thiruvel Thirumoolan
> Priority: Major
> Labels: balancer
> Attachments: HBASE-22356.master.001.patch,
> HBASE-22356.master.002.patch, HBASE-22356.master.003.patch
>
>
> A RegionServer API has to be added which will return HDFSBlockDistribution
> for all the regions it hosts. RS already has this info cached and updated
> when flush/compaction happens. Master can query and get instead of hitting
> the namenode and caching. The larger the cluster becomes, the more costly it
> becomes to get this information and more stale the cached information becomes.
> This jira is only to add the API to regionserver.
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