Caching StartKeys and EndKeys of Regions
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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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