From: Neil Brown <neilb@cse.unsw.edu.au>
To: Phy Prabab <phyprabab@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Linux NFS vs NetApp
Date: Tue, 11 Jan 2005 20:54:20 +1100 [thread overview]
Message-ID: <16867.41549.618.539945@cse.unsw.edu.au> (raw)
In-Reply-To: message from Phy Prabab on Monday January 10
On Monday January 10, phyprabab@yahoo.com wrote:
> Hello!
>
> I am trying to understand how NetApp can be so much
> better at NFS servicing than my quad Opteron 250 SAN
> attached machine. So I need some help and some
> pointers to understand how I can make my opteron
> machine come on par (or within 70% NFS performance
> range) as that of my NetApp R200. I have run through
> the NFS-how-to's and have heard "that is why they cost
> so much more", but I really have to consider that
> probably most of the ideas that are in the NetApp are
> common knowldge (just not in my head).
>
> Can anyone shed some light on this?
If you want to come anything close to comparable with a Netapp, get a
few hundred Megabytes of NVRAM (e.g. www.umem.com), and configure it
as an external journal for your filesystem (I know this can be done
for ext3, I don't know about other filesystems). Then make sure your
filesystem journals all data, not just metadata (data=journal option
to ext3).
If you use a dedicated drive (or mirrored pair) in place of the NVRAM,
you will come reasonably close.
NeilBrown
next prev parent reply other threads:[~2005-01-11 9:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <message from Phy Prabab on Monday January 10>
2005-01-11 2:54 ` Linux NFS vs NetApp Phy Prabab
2005-01-11 3:58 ` Anton Blanchard
2005-01-11 7:42 ` Joel Jaeggli
2005-01-11 9:19 ` Valdis.Kletnieks
2005-01-11 10:01 ` Jakob Oestergaard
2005-01-11 14:43 ` J. Bruce Fields
2005-01-12 11:32 ` Jakob Oestergaard
2005-01-11 18:55 ` Valdis.Kletnieks
2005-01-11 9:54 ` Neil Brown [this message]
2005-01-11 11:38 ` Lincoln Dale
2005-01-11 22:02 ` Neil Brown
2005-01-11 23:36 ` Bernd Eckenfels
2005-01-12 0:41 ` Trond Myklebust
[not found] <200501111711.50218.as@cohaesio.com>
2005-01-11 16:21 ` J. Bruce Fields
2005-01-11 17:53 ` Anders Saaby
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