NFS problems between RHEL4 U3 and RHEL4U6

[Chet Nichols III]

You ever figure this one out?
Chet

On Mon, Jul 14, 2008 at 11:57 AM, <jerry.feldman at algorithmics.com> wrote:

> RHEL4U3 is running a 2.6.9-34 kernel with nfs utils 1.0.6-65.
> RHEL4U6 is running 2.6.9-64 kernel with 1.0.6-84.
>
> I am also aware that there was a spinlock issue in the Update 3 kernel
> that affected us on a several hundred system benchmark a couple of years
> ago, with a patch that was supposed to be in Update 6. I don't think the
> spinlock bug is the issue, but it does look like some type of locking
> issue. The reason I don't think we are running into the spinlock issue
> is that we are not driving the systems heavily.
>
> --
> Jerry Feldman <Jerry.Feldman at algorithmics.com>
> Algorithmics (US), Inc
> Suite 2-400
> 275 Grove St.
> Newton, MA 02466
> 617-663-5220
> 617-663-5391 (fax)
>
>
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com [mailto:redhat-list-
> > bounces at redhat.com] On Behalf Of chaim.rieger at gmail.com
> > Sent: Monday, July 14, 2008 11:47 AM
> > To: General Red Hat Linux discussion list
> > Subject: Re: NFS problems between RHEL4 U3 and RHEL4U6
> >
> > What version of nfs are they running ?
> > Sent via BlackBerry from T-Mobile
> >
> > -----Original Message-----
> > From: <jerry.feldman at algorithmics.com>
> >
> > Date: Mon, 14 Jul 2008 09:57:29
> > To: <redhat-list at redhat.com>
> > Subject: NFS problems between RHEL4 U3 and RHEL4U6
> >
> >
> > My primary NFS server is running RHEL4 Update3 (unpatched). I just
> added
> > a few servers running U6. (The specific release I run is specified by
> > our IT department). The problem I am seeing is:
> > When I save an 8MB file from our application on a client RHEL4U3
> machine
> > the save time is about 1 second. When I perform the same test on a
> > client running RHEL4U6, the save takes about 2 minutes.
> >
> > As a test, I exported a directory from one of the RHELU6 systems, and
> > the save times were good on both an update 3 and update 6 client. So,
> > one solution is to upgrade U3 to U6. (I would probably do a fresh
> > install). But, that requires some downtime, and the server room is not
> > accessible after hours. (All disks are removable so I probably could
> > move the volume group to one of the existing servers to minimize
> > downtime).
> >
> > I would like to know if there is some existing NFS issue between U3
> and
> > U6. If I could provide a temporary fix, that would be a better interim
> > solution until the additional drives I ordered arrive.
> >
> > --
> > Jerry Feldman <Jerry.Feldman at algorithmics.com>
> > Algorithmics (US), Inc
> > Suite 2-400
> > 275 Grove St.
> > Newton, MA 02466
> > 617-663-5220
> > 617-663-5391 (fax)
> >
> >
> >
> >
> >
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chet nichols III
chet.nichols at gmail.com
aim: chet / twitter: chet
http://chetnichols.org
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