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  1. Lustre
  2. LU-2061 HSM - Coordinator - Land to Master
  3. LU-2713

limit HSM RPC count from client

Details

    • Technical task
    • Resolution: Fixed
    • Blocker
    • Lustre 2.4.0
    • Lustre 2.4.0
    • 6608

    Description

      The client-side HSM coordinator patches in http://review.whamcloud.com/5029 and http://review.whamcloud.com/5030 were landed, but Oleg realized that there are no client-side limits on the number of concurrent RPCs that can be sent.

      This could potentially overwhelm the MDS service threads and block all other requests if they become blocked handling HSM requests, or if they are not being processed very quickly.

      Please institue a client-side RPC limit, like cl_max_rpcs_in_flight, but for HSM requests, that introduces some reasonable limit.

      The ticket is assigned to Jinshan, but only because we cannot currently assign it to someone external.

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-2949 ensure MDC RPCs are controlled by max_rpcs_in_flight param

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Activity

            [LU-2713] limit HSM RPC count from client
            pjones Peter Jones made changes -
            Fix Version/s New: Lustre 2.4.0 [ 10154 ]
            Resolution New: Fixed [ 1 ]
            Status Original: In Progress [ 3 ] New: Resolved [ 5 ]
            jhammond John Hammond made changes -
            Link New: This issue is related to LU-2949 [ LU-2949 ]
            jhammond John Hammond made changes -
            Status Original: Open [ 1 ] New: In Progress [ 3 ]
            adilger Andreas Dilger made changes -
            Assignee Original: Jinshan Xiong [ jay ] New: John Hammond [ jhammond ]
            adilger Andreas Dilger created issue -

            People

              jhammond John Hammond
              adilger Andreas Dilger
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              Dates

                Created:
                Updated:
                Resolved: