search for: nfsomet

...://wiki.linux-nfs.org> has helpful information about enabling debug output on the client end to see what is going on. I don't know in your situation if enabling server-side debugging is feasible. <http://nfs.sourceforge.net> also has useful tuning information. You may want to look at NFSometer and see if it can help. Devin

We have a "compute cluster" of about 100 machines that do a read-only NFS mount to a big NAS filer (a NetApp FAS6280). The jobs running on these boxes are analysis/simulation jobs that constantly read data off the NAS. We recently upgraded all these machines from CentOS 5.7 to CentOS 6.5. We did a "piecemeal" upgrade, usually upgrading five or so machines at a time, every few

...rything that if it is out of whack > you can get far-reaching symptoms that don't seem to have anything to do > with DNS. I believe so. I wouldn't bet my life on it. But there were certainly no changes to our DNS before, during or since the OS upgrade. > You may want to look at NFSometer and see if it can help. Haven't seen that, will definitely give it a try! Thanks for your thoughts and suggestions!