[Beowulf] automount on high ports
atchley at myri.com
Wed Jul 2 08:07:27 EDT 2008
On Jul 2, 2008, at 7:22 AM, Carsten Aulbert wrote:
> Bogdan Costescu wrote:
>> Have you considered using a parallel file system ?
> We looked a bit into a few, but would love to get any input from
> on that. What we found so far was not really convincing, e.g.
> at that time was not really stable, lustre was too easy to crash -
> at l
> east at that time, ...
I have not looked at GlusterFS at all. I have worked with Lustre and
PVFS2 (I wrote the shims to allow them to run on MX).
Although I believe Lustre's robustness is very good these days, I do
not believe that it will not work in your setting. I think that they
currently do not recommend mounting a client on a node that is also
working as a server as you are doing with NFS. I believe it is due to
memory contention leading to deadlock.
PVFS2 does, however, support your scenario where each node is a server
and can be mounted locally as well. PVFS2 servers run in userspace and
can be easily debugged. If you are using MPI-IO, it integrates nicely
as well. Even so, keep in mind that using each node as a server will
consume network resources and will compete with MPI communications.
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