HBase
  1. HBase
  2. HBASE-4989

Metrics to measure sequential reads and random reads separately

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Minor Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.94.0
    • Component/s: regionserver
    • Labels:
      None
    • Hadoop Flags:
      Incompatible change, Reviewed
    • Release Note:
      The metric fsReadLatency records the number of sequential reads. The metric fsPreadLatency records the number of random reads.

      Description

      HBase does sequential reads for compactions and positional random reads for satisfying user's queries. It would be nice if we can measure their latencies separately. It is mostly the random reads that dominate a transactional workload.

      1. metrics1.txt
        6 kB
        dhruba borthakur

        Activity

        dhruba borthakur created issue -
        dhruba borthakur made changes -
        Field Original Value New Value
        Attachment metrics1.txt [ 12506971 ]
        dhruba borthakur made changes -
        Status Open [ 1 ] Patch Available [ 10002 ]
        Hadoop Flags Incompatible change [ 10342 ]
        Release Note The metric fsReadLatency records the number of sequential reads. The metric fsPreadLatency records the number of random reads.
        stack made changes -
        Status Patch Available [ 10002 ] Resolved [ 5 ]
        Hadoop Flags Incompatible change [ 10342 ] Incompatible change,Reviewed [ 10342,10343 ]
        Fix Version/s 0.94.0 [ 12316419 ]
        Resolution Fixed [ 1 ]
        Lars Hofhansl made changes -
        Status Resolved [ 5 ] Closed [ 6 ]

          People

          • Assignee:
            dhruba borthakur
            Reporter:
            dhruba borthakur
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            Dates

            • Created:
              Updated:
              Resolved:

              Development