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• LND Timeout: LND declares that a message won't arrive.
  • IB timeout is (default?) slightly less than 4 seconds
  • LND timeout is timeout module parameter for o2ib and gni, sock_timeout module parameter for sock?
• LNet Reply Timeout: LNet declares an Ack/Reply won't arrive. > 2 * LND Timeout * (max hops -1)
  
  • Depends on the route!
• LNet Retry Timeout: LNet gives up on retries. > LNet Reply Timeout * max LNet retries
  • Depends on the route!
• peer_timeout module parameter: peer is declared dead. Either use for LNet Retry Timeout, or > LNet Retry Timeout.

It is not completely obvious how this scheme interacts with the Lustre's timeout parameter (the Lustre RPC timeout, from which a number of timeouts appear to be derived from that, but I think it isn't the LND timeout), or the peer_timeout per LND module parameterare derived).

O2IBLND

Overview

There are two types of events to account for:

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