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  1. HBase
  2. HBASE-364

[hbase] Make mapfile index interval configurable

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Details

    • Bug
    • Status: Closed
    • Minor
    • Resolution: Fixed
    • None
    • None
    • None
    • None

    Description

      Default mapfile index interval is every 128 entries. Basic tests show PerformanceEvaluation mapfile test random reading 100k records in 60plus seconds. If index interval is set to 1 so we don't have to next around looking for our record, then 100k random reads take 7 seconds. This is using local filesystem. If I set it to 16, then takes 12 seconds.

      Testing doing PerformanceEvaluation random reads against hbase, with interval set to 16, we run 50% faster (hdfs is in the picture).

      Attachments

        1. 2485.patch
          15 kB
          Michael Stack
        2. index.patch
          15 kB
          Michael Stack

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            stack Michael Stack
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