Is there a limit to the number of multicast groups you can join using opensm/infiniband on RHEL 5?

Solution Verified - Updated -

Issue

  • We seem to be encountering some sort of limitation with opensm and infiniband. Our application runs multicast over infiniband. We begin starting processes on our servers and they join the multicast groups correctly, but then no more processes are able to join from any server.
  • We believe this is due to some limitation in one of the components we are using. We have been unable to find what the limitation for the number of mutlicast groups or clients in opensm, the subnet manager for infiniband.

Environment

  • Red Hat Enterprise Linux 5
  • OpenSM/Infiniband
  • Voltaire IB Switches

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