Ralph Castain <r...@open-mpi.org> writes: > On Apr 24, 2013, at 8:58 AM, Dave Love <d.l...@liverpool.ac.uk> wrote: > >> "Elken, Tom" <tom.el...@intel.com> writes: >> >>>> I have seen it recommended to use psm instead of openib for QLogic cards. >>> [Tom] >>> Yes. PSM will perform better and be more stable when running OpenMPI >>> than using verbs. >> >> But unfortunately you won't be able to checkpoint. > > True - yet remember that OMPI no longer supports checkpoint/restart > after the 1.6 series. Pending a new supporter coming along
As far as I can tell, lack of PSM checkpointing isn't specific to OMPI, and I know people have resorted to verbs to get it. Dropped CR is definitely reason not to use OMPI past 1.6. [By the way, the release notes are confusing, saying that DMTCP is supported, but CR is dropped.] I'd have hoped a vendor who needs to support CR would contribute, but I suppose changes just become proprietary if they move the base past 1.6 :-(. For general information, what makes the CR support difficult to maintain -- is it just a question of effort?
