From: Greg Boehnlein <damin@nacs.net>
Subject: Re: Journaling FileSystems w/ NFS
Date: Sat, 21 Sep 2002 07:36:41 -0400 (EDT)
Sender: nfs-admin@lists.sourceforge.net
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Cc: <nfs@lists.sourceforge.net>
To: "Magnus Naeslund(f)" <mag@fbab.net>
In-Reply-To: <0cea01c260c2$7fb119b0$f80c0a0a@mnd>
Errors-To: nfs-admin@lists.sourceforge.net

On Fri, 20 Sep 2002, Magnus Naeslund(f) wrote:

> Greg Boehnlein <damin@nacs.net> wrote:
> > Hello,
> > Can someone point me to a FAQ on which is the best solution for
> > running a Journalized Filesystem with NFS support under Linux? We've
> > tried deploying JFS with RedHat 7.3 and NFS and have run into
> > problems. From my investigation, it appears that XFS is our best
> > option for running NFS with +2gig file size support.
> >
>
> Could you elaborate on what troubles you've had?
> I'm running several boxes that have 1TB partitions and run ReiserFS.
>
> One looks like this:
>
> [root@fet1a root]# mount
> /dev/hda6 on / type ext3 (rw,noatime)
> /dev/sda1 on /storage/disk1 type reiserfs (rw,noatime,notail)
> /dev/sdb1 on /storage/disk2 type reiserfs (rw,noatime,notail)
>
> [root@fet1a root]# df -ht reiserfs
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sda1             1.0T  809G  260G  76% /storage/disk1
> /dev/sdb1             1.0T   33M  1.0T   1% /storage/disk2
>
> Magnus

Let me bring you up to speed on what we are doing, and provide an accurate
idea of what our needs and requirements are. Instead of backing our data
up directly to tape, we instead dump it to a large 320 Gig, RAID-5
partition on a Linux box. That, in turn, is backed up to tape on a regular
basis and taken offsite. Recent growth of data on some of our "Cobalt Raq"
servers has forced us to upgrade to a filesystem that can handle file
sizes of greater than 2 gigs. (Why Cobalt doesn't split their backup
archives into multiple pieces is beyond me). On occasion, this partition
needs to be accessible via NFS for other Servers and workstations.
Obviously with a file system of that size, a journaling system would be
advantageous.

So, we need three main things:
1. Journaling File System
2. Large file support
3. NFS Compatibility

I had suggested XFS to my Operations Manager, but he decided to try using
JFS, as it was an included option in RedHat 7.3. Installation went
beautifully, and everything was peachy, until we tried to export that
file-system via NFS. Doing so caused the load average on the box to
skyrocket.. Apparently, NFS and JFS don't get along very well together.

Our solution? Use XFS. ;) However, there do appear to be issues between
JFS and NFS... Not sure where, or what, but I thought I'd mention it.

-- 
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         http://www.n2net.net Where everything clicks into place!
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