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  1. Lustre
  2. LU-12071

bypass pagecache for large files

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    Details

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

      Description

      pagecache invalidation is quite expensive:

      pagecache enabled:

      ost  1 sz 268435456K rsz 16384K obj   16 thr   64 write 5094.16 [2287.82, 6383.46] read 5295.85 [5039.42, 5567.47] 
      

      pagecache disabled:

      ost  1 sz 268435456K rsz 16384K obj   16 thr   64 write 4460.22 [3615.59, 5151.63] read 5218.00 [4847.41, 5551.34] 
      

      we do already have a mechanism to bypass pagecache in place, just need to use that properly.

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              Assignee:
              bzzz Alex Zhuravlev
              Reporter:
              bzzz Alex Zhuravlev
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                Dates

                Created:
                Updated:
                Resolved: