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  1. HBase
  2. HBASE-2649

Make use of storefile 'order' making certain decisions during merge sort

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.90.0
    • None
    • None
    • Reviewed

    Description

      When we merge sort results currently there is no regard for storefile order. This issue is about exploiting store file order at certain junctures. For example, if we have N KVs all of the same coordinates – same r/f/q/type/ts – then the one from the storefile that was made most recently should prevail. Also, we might consider order when looking at deletes so our tombstones are less tombstoney in that they'll only apply to values that are in storefiles older than the one that carries the delete marker (this latter sounds hard but putting it out there anyways).

      Attachments

        1. HBASE-1485-V9.patch
          43 kB
          Pranav Khaitan

        Issue Links

          is blocked by

          Task - A task that needs to be done. HBASE-2406 Define semantics of cell timestamps/versions

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

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              pranavkhaitan Pranav Khaitan
              stack Michael Stack
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                Created:
                Updated:
                Resolved: