On Fri, 12 Jun 2020 22:49:35 -0700 Chris Samuel <ch...@csamuel.org> wrote:
> On Friday, 12 June 2020 2:36:26 PM PDT John McCulloch wrote: > > > It is my understanding that setting MTU to 9000 is recommended but > > that seems to be applicable for 10GbE. > > That depends how you're running your IB fabric. In datagram mode > (which I think is the default these days) you're limited to an MTU of > 2044 bytes, but in connected mode (which used to be the default) you > could get (from memory) a 64KB MTU. Well you can actually run 4092 MTU on datagram mode (assuming you run 4K IB of course). This is a bit of best of both worlds but does require some configuration. /Peter _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit https://beowulf.org/cgi-bin/mailman/listinfo/beowulf
