Jays understanding is correct. If you do not give -j it defaults to -j100% (which seems to be what you are looking for).
Please read the examples in the man page, and let us know how this can be explained more clearly. /Ole On Wed, Feb 6, 2013 at 3:12 PM, Jay Hacker <[email protected]> wrote: > > My understanding is that you can use, for example, -j50% with --sshlogin > to use half the cores on each machine in your cluster. You could also look > into --load and/or --nice, or running your jobs with niceload(1), to > dynamically use all available CPU while also leaving capacity for others. > These and other good options are explained in the manual. > > > On Tue, Feb 5, 2013 at 3:19 PM, yacob sen <[email protected]> wrote: >> >> Dear All, >> >> I would like to use the Gnu Parallel inside a HPC machine (cluster) with >> several nodes and and a handful of core attached to each of the nodes. >> >> Up until now I have been using my local machine or a server with a >> multiple processor core that I can count using >> >> cat /proc/cpuinfo | grep "processor" | wc >> >> and supply this number depending on the intensiveness of the work not to >> slowdown a server and to free up some processor cores for other users >> >> parallel --eta -jn >> >> n=is the number of processor core that I want to use. >> >> How is this expanded in a cluster with several nodes and cores. Is the >> same command can be used ? If I and some one else in the cluster ask the >> same node can this parallel be adversely affected in terms of speed. >> >> I am looking forward to hear from you. >> >> Regards, >> >> Yacob > >
