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  1. Couchbase Server
  2. MB-4693

EPERF - disk write stuck during large scale write load

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Blocker
    • Resolution: Incomplete
    • Affects Version/s: 2.0-developer-preview-3
    • Fix Version/s: 2.0-developer-preview-4
    • Component/s: couchbase-bucket
    • Security Level: Public
    • Labels:
    • Environment:
      2.0.0r-552
      centos5.4 64
      10 nodes
      eperf write test

      Description

      Running a write test (Read:Insert:Update:Delete Ratio = 20:15:60:5) with 10 nodes and 50 million items, one of the nodes failed to write its items to disk.

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          Activity

          Hide
          steve Steve Yen added a comment -

          Hi Dustin, any progress on this?

          Show
          steve Steve Yen added a comment - Hi Dustin, any progress on this?
          Hide
          dustin Dustin Sallings (Inactive) added a comment -

          Unfortunately, nothing right now. We've got fingers pointing at each other from ep-engine and mccouch. I think the state of ep-engine is captured here, but if we could get the state of proceses of mccouch on this connection at the time, we might be able to see where the mis-sync is happening.

          It looks like the diags do have proces info in a very verbose kind of way. There might be enough information somewhere in the logs.

          Show
          dustin Dustin Sallings (Inactive) added a comment - Unfortunately, nothing right now. We've got fingers pointing at each other from ep-engine and mccouch. I think the state of ep-engine is captured here, but if we could get the state of proceses of mccouch on this connection at the time, we might be able to see where the mis-sync is happening. It looks like the diags do have proces info in a very verbose kind of way. There might be enough information somewhere in the logs.
          Hide
          steve Steve Yen added a comment -

          haven't seen it last week's perf runs; will reopen if we see it again

          Show
          steve Steve Yen added a comment - haven't seen it last week's perf runs; will reopen if we see it again
          Hide
          dustin Dustin Sallings (Inactive) added a comment -

          I think it's not worth putting time into if we're planning on replacing this path, anyway.

          Show
          dustin Dustin Sallings (Inactive) added a comment - I think it's not worth putting time into if we're planning on replacing this path, anyway.
          Hide
          farshid Farshid Ghods (Inactive) added a comment -

          haven't seen this issue while running latest eperf write runs ( build 646 )

          Show
          farshid Farshid Ghods (Inactive) added a comment - haven't seen this issue while running latest eperf write runs ( build 646 )

            People

            • Assignee:
              dustin Dustin Sallings (Inactive)
              Reporter:
              keith Keith Batten (Inactive)
            • Votes:
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              Watchers:
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              Dates

              • Created:
                Updated:
                Resolved:

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