Is pNFS stable enough yet?

[J. Bruce Fields]

On Mon, Apr 21, 2008 at 01:29:42PM -0700, mike wrote:
> I have a very simple setup. NFS v3 and v4 both are giving me trouble.
> 
> However, someone has now informed me it *might* be disks behind my HW
> RAID causing some issues. So at the moment I am waiting to see about
> that.
> 
> I have a data set size of ~ 600 gig, combined traffic of 3MB/sec, 3
> webservers, and 1 RAID server. The files ar ePHP scripts, media and
> graphic files (standard web stuff) and average size is probably less
> than 1MB. Total number of files - 3million+
> 
> I have a private gigabit VLAN for inter-server communication, which is
> mainly just files (NFS) and MySQL traffic. So I don't know how I keep
> having issues with my NFS setups when people are running with 100's or
> 1000's of clients and much larger workloads.
> 
> Re: your question below, I would probably have just ran the MDS and
> the DS on the same RAID server. I don't think it would make sense to
> run MDSes off the webservers too. I don't have a lot of physical
> servers to throw around... and since pNFS isn't stable enough yet,
> then it's not an option anyway I suppose.
> 
> If anyone on this list would be available to consult and help me get
> my Ubuntu Linux setup properly tuned for NFS (v3 or v4, doesn't
> matter) please contact me. Some hardware knowledge would be nice, in
> case something looks out of place and you can tell me "hey stupid,
> you're hitting XYZ bottleneck - you need different hardware" - but
> that shouldn't be the case. I should be able to grow for a long while
> on this equipment...

If you didn't mind posting the details (what hardware?  what exactly is
the trouble? etc.) to linux-nfs at vger.kernel.org, people might have some
suggestions.

--b.