Performance of small sequential non-contiguous writes over NFS suffers when the client has the file locked

Solution Unverified - Updated -

Issue

  • Customer has a homegrown benchmark that basically enqueues 50,000 messages into a MQseries queue manager queue, and then reads them back out. The load phase is taking 2 to 3 times as long on a RHEL client as it previously did on an AIX client.
  • MQseries performance benchmark taking twice as long to write to an NFSv4 export from RHEL than it does from AIX.
  • Performance of small sequential non-contiguous writes over NFS suffers when the client has the file locked

Environment

  • Red Hat Enterprise Linux 6 client
  • NetApp filer
  • IBM MQseries middleware software

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