On Thu, 2008-06-12 at 14:22 +0300, Olga Shern (Voltaire) wrote: > > > On 6/12/08, Olga Shern (Voltaire) <[EMAIL PROTECTED]> wrote: > > > On 6/12/08, Hal Rosenstock <[EMAIL PROTECTED]> wrote: > On Tue, 2008-06-10 at 05:59 +0300, Sasha Khapyorsky > wrote: > > Basically this addresses the problem described by Al > Chu in: > > > > http://lists.openfabrics.org/pipermail/general/2008- > April/049132.html > > > > When base lid paths become completely disbalanced on > a fabrics with > > lmc > 0. > > > > One feedback was from Yiftah Shahar: > > > > "I think that our requirements should be that even > when you are working > > with LMC>0 then the base LID routing should not be > affected. > > > One way to achieve this goal is to first run the > base-LID routing (so > > all base LID improvement will be also in LMC>0) and > then start with the > > other LIDs as round-robbing starting from the base- > lid-port + 1 > > according current routing algorithm rules (keeping > min-hop, up/down...)." > > > > We had some discussion with Al and Yiftah about this > and considered that > > in addition to "pure" base lid paths preservation > (which is good thing by > > itself) proposed method solves original lid > disbalancing problem as well. > > Would you elaborate on the motivation behind the > requirement to > maintain/preserve the base LID routing ? > > -- Hal > > LMC > 0 is mainly used by MPI, all other protocols / > applications will use only one LID (PATH),
That's today; what happens when more ULPs are able to take advantage of alternate LIDs ? -- Hal > therefore we should make sure that performance of these > protocols / applications will not be effected if fabric is > configured with LMC > 0 > > > I meant "affected" and not "effected" of course > > _______________________________________________ > 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 > > _______________________________________________ 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
