Re: [BProc] slow NFS transfers

[Wally E. <Wal...@ut...>]

Joshua Aune wrote:
 >Check /proc/sys/net/core/[rmem*,wmem*] and friends on the nodes.  If I
 >remember correctly the init script for nfs in rh8 fiddles with these for
 >the better.  Also see http://tldp.org/HOWTO/NFS-HOWTO/performance.html
 >for some ideas and reccomended values for these settings.

Thanks for the tip.  I didn't know that those files were there.  That 
wasn't the problem, however.  Those files were the same on both 
systems.  To fix my NFS slowness, I added bg and soft options to the 
clustermatic mounts in fstab:
bg,soft,nolock,intr,rsize=8192,wsize=8192 0 0

That got my speed to about 8 seconds for a 250MB transfer, which is fine 
for now.  I will be using the tips from you and Michael Madore to tweak it 
some more.

Thanks for your help.

At 12:52 PM 9/11/2003 -0600, Joshua Aune wrote:
>Doing this on one system took me from 6MB/s to 70MB/s with a single
>server and single client communicating over gigE :).  This required tuning
>on both the client and server settings.
>
>The system that hit 70MB/s on an iozone throughput test had the
>following options: rw,rsize=8182,wsize=8192,noac
>
> > And a sample from /etc/fstab on a non-clustermatic node with the same
> > hardware:
> > nfsserver:/exports/home  /home  nfs  bg,soft,intr,rsize=8192,wsize=8192 0 0
>
>Hope this helps,
>Josh