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https://issues.apache.org/jira/browse/HBASE-5492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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honghua zhu updated HBASE-5492:
-------------------------------
Attachment: HBASE-5492.patch
> Caching StartKeys and EndKeys of Regions
> ----------------------------------------
>
> Key: HBASE-5492
> URL: https://issues.apache.org/jira/browse/HBASE-5492
> Project: HBase
> Issue Type: Improvement
> Components: client
> Affects Versions: 0.92.0
> Environment: all
> Reporter: honghua zhu
> Fix For: 0.92.1
>
> Attachments: HBASE-5492.patch
>
>
> Each call for HTable.getStartEndKeys will read meta table.
> In particular,
> in the case of client side multi-threaded concurrency statistics,
> we must call HTable.coprocessorExec== > getStartKeysInRange ==>
> getStartEndKeys,
> resulting in the need to always scan the meta table.
> This is not necessary,
> we can implement the
> HConnectionManager.HConnectionImplementation.locateRegions(byte[] tableName)
> method,
> then, get the StartKeys and EndKeys from the cachedRegionLocations of
> HConnectionImplementation.
> Combined with https://issues.apache.org/jira/browse/HBASE-5491, can improve
> the performance of statistical
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