On Nov 1, 2011, at 7:31 PM, Blosch, Edwin L wrote: > I’m getting this message below which is observing correctly that /tmp is > NFS-mounted. But there is no other directory which has user or group write > permissions. So I think I’m kind of stuck, and it sounds like a serious > issue.
That does kinda suck. :-\ > Before I ask the administrators to change their image, i.e. mount this > partition under /work instead of /tmp, I’d like to ask if anyone is using > OpenMPI on a state-less cluster, and are there any gotchas with regards to > performance of OpenMPI, i.e. like handling of /tmp, that one would need to > know? I don't have much empirical information here -- I know that some people have done this (make /tmp be NFS-mounted). I think there are at least some issues with this, though -- many applications believe that a sufficient condition for uniqueness in /tmp is to simply append your PID to a filename. But this may no longer be true if /tmp is shared across multiple OS instances. I don't have a specific case where this is problematic, but it's not a large stretch to imagine that this could happen in practice with random applications that make temp files in /tmp. -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
