[Gllug] NFS problem

[Alain Williams]

On Thu, Oct 18, 2007 at 05:27:31PM +0100, Chris Jones wrote:
> Hi
> 
> John Edwards wrote:
> > I've never used TRU64, but have you tried to mount this without the
> > "soft" option?
> > 
> > In the past that has caused problems on some Linux machines (long time
> > ago, can't remember the details).
> 
> While soft and intr are helpful for being able to interrupt tasks that
> are blocking on a failed NFS server, they are very much unhelpful if
> your NFS server isn't responding in a timely fashion because the client
> will fail them and your userspace apps see their files go away.

I reduced the read/write size to 1/2k (rsize=512,wsize=512) and it seems to work.
I don't think that I have fixed the problem as much as made it 'go away'.
The performace is crap, but since it is for overnight compiles it is kind of OK
(until someone winges tomorrow).

The IBM Network Attached Storeage s/ware has a debug mode (which *really* does kill
performance) that shows all of the actions done by a client. The thing seems to create files
and immediately try to read from them before writing. This strikes me as curious, but I
won't pretend to be intimate with the NFS protocol:

	10-18-2007 15:39:25 CREATE  SUCCESS 152.144.160.165 \DosDevices\V:\nt-g\devtryhostbuild\tru64\doc1gen\release\cxx_repository\tru64.g1.com.aoxBea
	10-18-2007 15:39:25 READ    SUCCESS 152.144.160.165 \DosDevices\V:\nt-g\devtryhostbuild\tru64\doc1gen\release\cxx_repository\tru64.g1.com.aoxBea
	10-18-2007 15:39:26 WRITE   SUCCESS 152.144.160.165 \DosDevices\V:\nt-g\devtryhostbuild\tru64\doc1gen\release\cxx_repository\tru64.g1.com.aoxBe
	10-18-2007 15:39:26 WRITE   SUCCESS 152.144.160.165 \DosDevices\V:\nt-g\devtryhostbuild\tru64\doc1gen\release\cxx_repository\tru64.g1.com.aoxBe

-- 
Alain Williams
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