On Fri, Sep 8, 2017 at 8:41 PM, Prentice Bisbal <pbis...@pppl.gov> wrote: > I have a dozen servers that are all identical hardware: SuperMicro servers > with AMD Opteron 6320 processors. Every since we upgraded to CentOS 6, the > users have been complaining of wildly inconsistent performance across these > 12 nodes. I ran LINPACK on these nodes, and was able to duplicate the > problem, with performance varying from ~14 GFLOPS to 64 GFLOPS.
Are all these applications using MPI? And do you have /tmp also as part of the NFS root? If so, try moving /tmp to a local filesystem or direct the MPI lib to use a local directory instead (f.e. by setting TMPDIR environment variable on all nodes). Cheers, Bogdan _______________________________________________ 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
