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    • Improvement
    • Resolution: Unresolved
    • Minor
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    • 3
    • 9223372036854775807

    Description

      Implement separate read and write RPC latency histograms in the OSC layer to track the time between RPC submission and completion. This provides valuable performance metrics for diagnosing client-server communication issues, similar to existing size histograms.

      (Ticket description by Augment)

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            [LU-18993] Add latency stats to rpc_stats

            "Patrick Farrell <pfarrell@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/59175
            Subject: LU-18993 osc: Add RPC latency statistics by size
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: 2f10d5a4a19fc92e7afbc98084884b654961649a

            gerrit Gerrit Updater added a comment - "Patrick Farrell <pfarrell@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/59175 Subject: LU-18993 osc: Add RPC latency statistics by size Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: 2f10d5a4a19fc92e7afbc98084884b654961649a

            It may also be useful to have a stat somewhere that tracks the number of sync writes for debugging purposes.

            adilger Andreas Dilger added a comment - It may also be useful to have a stat somewhere that tracks the number of sync writes for debugging purposes.

            See LU-18934 for similar work that is in progress on the server side.

            Note that modifying existing stats files can be problematic for tools that scrape these stats, though I suspect it is less of a concern on the client than on the server...

            adilger Andreas Dilger added a comment - See LU-18934 for similar work that is in progress on the server side. Note that modifying existing stats files can be problematic for tools that scrape these stats, though I suspect it is less of a concern on the client than on the server...

            Note this info is already available in other places, but is harder to get.

            paf0186 Patrick Farrell added a comment - Note this info is already available in other places, but is harder to get.

            "Patrick Farrell <pfarrell@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/59172
            Subject: LU-18993 osc: Add separate read/write RPC latency histograms
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: a1c4ef8c294395a241e5edf25d3ad96b4aad2dbc

            gerrit Gerrit Updater added a comment - "Patrick Farrell <pfarrell@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/59172 Subject: LU-18993 osc: Add separate read/write RPC latency histograms Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: a1c4ef8c294395a241e5edf25d3ad96b4aad2dbc

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              paf0186 Patrick Farrell
              paf0186 Patrick Farrell
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                Created:
                Updated: