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Posted to issues@hbase.apache.org by "Thiruvel Thirumoolan (JIRA)" <ji...@apache.org> on 2019/05/02 21:39:00 UTC

[jira] [Created] (HBASE-22356) API to get hdfs block distribution from regionservers

Thiruvel Thirumoolan created HBASE-22356:
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             Summary: 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
             Fix For: 3.0.0, 2.2.1, 1.5.1


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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