Uploaded image for project: 'Lustre'
  1. Lustre
  2. LU-1023

strange numbers shown in obdfilter-survey

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: Lustre 2.2.0
    • Fix Version/s: Lustre 2.2.0
    • Labels:
      None
    • Severity:
      3
    • Rank (Obsolete):
      4750

      Description

      I'm testing lustre-2.1.54 and quick ran obdfilter-survey on it. The obdfilter-survey could run, but some numbers are strange and some numbers are not working well. (same results on current master branch)

      Here is obdfilter_survey_<date>_<hostname>.summary.

      Mon Jan 23 12:07:10 JST 2012 Obdfilter-survey for case=disk from dl02
      ost 1 sz 100663296K rsz 1024K obj 2 thr 128 write 714.81 ERROR read 1319.86 ERROR

      It always shows ERROR for min and max value, because stats[0] in global values in obdfilter_survey_<date>_<hostname>.detail is always -1.

      And, here is obdfilter_survey_<date>_<hostname>.detail.

      126/128 Total: 637.928552/second
      126/128 Total: 662.950942/second
      126/128 Total: 564.928819/second
      126/128 Total: 698.904949/second
      128/128 Total: 696.935185/second
      119/128 Total: 686.928559/second
      Total: total 98304 threads 128 sec 0.000000 inf/second
      =============> write global
      -1 564.928819 828.885614

      difftime (start and end) is zero(0.000000) and return infinity of thread per second, because divided by zero.

      Also, I saw some very strange numbers on the detail log file.

      128/128 Total: 805.908932/second
      124/128 Total: 827.918036/second
      128/128 Total: 851.893513/second
      128/128 Total: 3098.609575/second
      ^^^^^^^^^^^^^^^^^^
      128/128 Total: 798.896942/second

      during the test, it sometimes shows unreasonable numbers above.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                di.wang Di Wang
                Reporter:
                ihara Shuichi Ihara (Inactive)
              • Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: