Akemi Yagi wrote:
> This problem does not seem to be associated with specific hardware as
> implied in the original thread. The person on the SciLinux mail list
> has Dell machines, and I was able to confirm the issue using custom
> built boxes. I have added a note in the bug tracker at:
>
> http://bugs.centos.org/view.php?id=2635
Unrelated, but still kind of related, I'm only replying because of
how crazy I went trying to track it down. But I had major NFS client
issues on CentOS 4.5, specifically kernels after 2.6.9-55.ELsmp. Even
under pretty light load, after seemingly random periods of time NFS
write performance would go down 99.99999%. Read performance was fine.
Downgrade the kernel and it worked fine again. Eventually for servers
that ran our critical apps for NFS I just upgraded them to CentOS 5.1
and there is no problems there for us at least.
Spent several weeks researching the problem but never found a solution,
since it took so long to reproduce(up to 24 hours typically), testing
different configurations was very time consuming.
And no I haven't filed any bug reports or anything as I wanted to
try to narrow it down further to find the source before that. But
I ran out of time, and the kernel in CentOS 5.1 seems to work fine.
(migrated production systems to it about 6 weeks ago)
The newer kernel didn't/does not affect the NFS servers at all,
as they are all running CentOS 4.5 with 2.6.9-55.0.9.ELsmp, it's
purely a client-side issue.
(sorry, end rant :) )
nate
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
