Uploaded image for project: 'Lustre'
  1. Lustre
  2. LU-12631

Report latency of client operations

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: Lustre 2.14.0
    • Labels:
    • Rank (Obsolete):
      9223372036854775807

      Description

      Add statistics on the client to measure and report latency of operations.

      The current llite.*.stats file only reports the operation counts, not the time taken for each one. It should be simple to add stats to measure min/max/sum/sumsq for these metrics, including new read and write operations for the latency, as currently it reports read_bytes and write_bytes, which should also be kept. It might make sense to report sync writes separately as write_sync (with file->f_flags & (O_DIRECT | O_SYNC) set) since the latency profile will be quite different compared to cached writes.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                adilger Andreas Dilger
                Reporter:
                adilger Andreas Dilger
              • Votes:
                0 Vote for this issue
                Watchers:
                6 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: