Beowwulf Status Monitor on Scyld
agrajag at scyld.com
Mon Nov 12 00:06:15 EST 2001
On Sun, 11 Nov 2001, german kogan wrote:
> > It means that 181M out of 251M are used, and that's approximately 72% of
> > the RAM. When looking at this number, its important to remember that
> > the 181M is the RAM being used by processes on the system, as well as
> > any memory the kernel is using for buffers and cache (such as it uses
> > with filesystems to speed up repeated accesses).
> But it seems that too much RAM is being ussed up. All I have done was boot
> up the slave nodes, and have not run anything on them. Or is this normal?
See what I wrote before. That number includes memory the kernel might
be using for buffers and cache. You might also want to try doing 'bpsh
<node> free' to see a breakdown of how the memory on the slave node is
> Also, another question is about mpi. I have ran a simple test code on
> the cluster, and some processes seem to run on the master node. What do I
> have to do to prevent this from happening? So that the processes only run on
> the slave nodes.
I'm assuming you're using -8. When running your MPI job, set NO_LOCAL=1
just like you set the NP
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