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  1. HBase
  2. HBASE-5492

Caching StartKeys and EndKeys of Regions

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 0.92.0
    • Fix Version/s: None
    • Component/s: Client
    • Labels:
      None
    • Environment:

      all

      Description

      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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              • Assignee:
                Unassigned
                Reporter:
                zhh Honghua Zhu
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                • Created:
                  Updated:
                  Resolved: