HBase
  1. HBase
  2. HBASE-10421

Investigate scan performance in 0.96 and later

    Details

    • Type: Bug Bug
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Not A Problem
    • Affects Version/s: 0.98.0
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      Testing the "internal friction" of scanning in HBase (all data in the block cache, and all rows filtered at the server by a ValueFilter, so that one really measures the work HBase does internally), I found that 0.98 is almost 35% slower than 0.94.

      Scanning 50m rows (one col each, 8 byte keys, 8 byte values) takes 13.2 in 0.94.17-SNAPSHOT and 18.5s in 0.98.

      This probably came about with all the protobuf changes in 0.96.
      It should be possible to bring back to par with 0.94.

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            • Assignee:
              Unassigned
              Reporter:
              Lars Hofhansl
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              • Created:
                Updated:
                Resolved:

                Development