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  1. HBase
  2. HBASE-3082

For ICV gets, first look in MemStore before reading StoreFiles

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Details

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

    Description

      For incrementColumnValue operations, it is possible to check MemStore for the column being incremented without sacrificing correctness. If the column is not found in MemStore, we would then have to do a normal Get that opens/checks all StoreFiles for the given Store.

      In practice, this makes increment operations significantly faster for recently/frequently incremented columns.

      Attachments

        1. HBASE-3082-FINAL.patch
          9 kB
          Jonathan Gray

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. HBASE-3443 ICV optimization to look in memstore first and then store files (HBASE-3082) does not work when deletes are in the mix

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

          Bug - A problem which impairs or prevents the functions of the product. HBASE-2959 Scanning always starts at the beginning of a row

          • Major - Major loss of function.
          • Closed

          Activity

            People

              khemani Prakash Khemani
              streamy Jonathan Gray
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              Dates

                Created:
                Updated:
                Resolved: