Re: Slow NFS
Andrew Reid <email@example.com> wrote:
> There is a performance-tuning section in the NFS Howto,
> with several tips, including simple tests for measuring performance.
Thanks for the reminder. Somehow I'd missed that section of the Howto.
> My own experience with NFS on a server with several tens of
> clients is that the biggest determiner of performance is the type
> of file operations you're doing.
A Java compile on a tree mounted via NFS is the biggest hit (IO bound,
not compute bound!). There's the usual edit stuff associated with a
perl/html website, but that's one (small-ish) file at a time and the
delay is not so noticeable. Oh, and a development installation of ORACLE
RAC is using another NFS partition for its stuff, but again this isn't
very heavy usage.
One thing that I discovered from the NFS Howto is that our NFS
server was running only a single nfsd thread. That, despite the
/etc/default/nfs-kernel-server file having a definition of
RPCNFSDCOUNT=8. I don't see why the 8 is being ignored in favour of 1,
but that's for another day.
- Slow NFS
- From: Chris Davies <firstname.lastname@example.org>
- Re: Slow NFS
- From: Andrew Reid <email@example.com>