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  1. Lustre
  2. LU-12631

Report latency of client operations

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Details

    • Improvement
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • None
    • Lustre 2.14.0
    • 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.

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              adilger Andreas Dilger
              adilger Andreas Dilger
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                Updated:
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