On 07:44 Fri 13 Apr , Hal Rosenstock wrote: > Hi, > > There has been a lot of discussion over the last week on failed > multicast joins. > > The current default rate for multicast groups is 10 Gbps. This means > that slower nodes (whether due to 1x SDR equipment or a degraded link) > will fail the join. > > The current default was chosen in the belief that most installations > would be 4x SDR equipment or better (the most common use case) rather > than the lowest common denominator use case. Also, choosing a lower > default affects preformance of all multicast groups (which includes the > IPv4 broadcast group as well as any other derived groups (not just IPoIB > multicast groups)). So when certain performance tests are run, this will > be a factor which needs to be investigated. The thinking was that those > subtle things are harder (but perhaps less frequent) to find than the > "harder" join error which forces the admin to decide one way or the > other so there is no masking this. > > So the question is whether the best default is 2.5 Gbps which would > allow any nodes to join or whether the current default is appropriate ? > I know certain people's opinions who have been vocal on this list up to > now. I'm looking for other opinions. Thanks.
This value is configurable, and 10Gs/s as default looks reasonable for me. Sasha _______________________________________________ general mailing list [EMAIL PROTECTED] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
