Am 22.08.2013 um 20:00 schrieb Prentice Bisbal: > On 08/20/2013 02:03 PM, Mark Hahn wrote: >>> 1. Many people's job scripts use ssh either directly (to say clean up /tmp) >>> or indirectly from mpirun. >> sure. >> >>> (good mpirun's use the batch engine's per-node >>> daemon to launch the binaries not ssh). >> why should a scheduler have daemons cluttering up compute nodes? >> also, do you really launch so many very big but very short jobs >> that startup time is a serious concern? I'm questioning assumptions here. >> > > It's not about reducing startup time. It's about controlling the jobs > accurately. With SGE, all jobs started are children of the sge_sheperd > processes (which gets started by the sge_execd daemon). This allows SGE > to have ultimate control over the jobs (suspend resume, kill, etc.) and > provide accurate process accounting. When you just use SSH, can you > provide that level of control?
+1 > And if you really want to be a pro, you create a prolog script that > creates a unique temp directory for the user, that they can reference > with an environment variable (say, SCRATCH, or SGE_TMP or something One you get for free in SGE and it can be accessed by $TMPDIR inside the jobscript. A creation in a prolog is only necessary in case you need a second one (maybe a global one in addition to the one on the node). -- Reuti > similar), that they can use while their job is running, and then have an > epilog script that will automatically clean it up after the job completes. > > If you're users must clean up /tmp themselves after jobs are done, > something is not right. > > Prentice > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
