Thanks for the information Don! Andy
On 02/28/2013 07:23 PM, Lipari, Don wrote: > I passed on the question to our resident authority in this area, and here was > her reply... > > The largest job I could find was a 1K node (16K processes) hello world > MPI job on Cab. It took 51 seconds to start the job, print out 16K hello > world messages and exit normally. > > For what it's worth, I ran the same hello world job on Sequoia on 122880 > nodes with 16 processes per node for a job with 1966080 total MPI > processes. This job took 322 sec and produced an output file of about > 230 MB (a whole lot of hello world messages). > > *************************************************** > * Sheila A. Faulkner * > * Software Development Group * > * Livermore Computing * > * Lawrence Livermore National Laboratory * > * P.O. Box 808 L-557 * > * Livermore, CA 94551 * > * Phone: (925)-424-8471 * > * Email: [email protected] * > *************************************************** > >> -----Original Message----- >> From: Andy Riebs [mailto:[email protected]] >> Sent: Thursday, February 28, 2013 12:05 PM >> To: slurm-dev >> Subject: [slurm-dev] job start-up times? >> >> >> I've been asked (and have no good answer) about how long it takes to >> start a SLURM job on an x86_64 cluster that allocates, say, 2000 16-core >> nodes (32k processes). My googling skills have failed me on this query; >> does anyone have anecdotal evidence or pointers for the time SLURM >> requires to start huge jobs? >> >> Thanks in advance! >> Andy >> >> -- >> Andy Riebs >> Hewlett-Packard Company >> High Performance Computing >> +1-786-263-9743 >> My opinions are not necessarily those of HP -- Andy Riebs Hewlett-Packard Company High Performance Computing +1-786-263-9743 My opinions are not necessarily those of HP
