[UFO Chicago] NFS problems

[Richard Lynch]

I've heard many people say NFS is slow.

I've never heard anybody say it was fast.

YMMV

On Wed, November 1, 2006 4:04 pm, Rory L. O'Connor wrote:
> having some issues with NFS on a new server arrangement we have.  we
> have a storage server, database server, and two web application
> servers
> with their home directories mounted to the storage server via NFS.
> All
> fronted by a load balancer.  Anyway, this stuff is all super fast
> top-of-the line stuff with 64-bit processors and tons of memory.  But
> it
> appears NFS is bottlenecking.  I noticed this when I ran a script on
> the
> webserver that writes a large file to the storage server.  It took a
> very long time to run (MUCH longer than our current webserver
> arrangement which the new hardware is replacing).  I tailed the file
> while the script was running and noticed that it would write, pause,
> write, pause, etc.  Like it was reaching a threshold and pausing until
> it cleared out.
>
> tried increasing rsize and wsize, and memory limits on the input queue
> and it made an initial difference - from 2 minutes down to 10 secs -
> but
> on the old server it runs in 4 seconds (and the old server is old and
> slow!).  so it's almost like NFS is making our fancy new hardware
> arrangement actually a step BACKWARDS.  our sessions are managed with
> text files that will be written over this NFS connection, and though I
> don't have a way to test how it will work under heavy load, if writing
> is slow for one big file I'm gonna go ahead and guess it's going to be
> slow for tons of little ones.
>
> Has anyone used NFS for heavy-load arrangements, or used another
> solution like OpenAFS with alot of load?  any ideas are apprciated!
>
> Thanks!
> _______________________________________________
> UFO Chicago -- Users of Free Operating Systems
> Free Software Rules -- Proprietary Drools!
> http://ufo.chicago.il.us/cgi-bin/mailman/listinfo/ufo
>


-- 
Some people have a "gift" link here.
Know what I want?
I want you to buy a CD from some starving artist.
http://cdbaby.com/browse/from/lynch
Yeah, I get a buck. So?