From: "Alex Wun" Subject: NFS sync write performance Date: Tue, 24 Feb 2004 12:07:04 -0500 Sender: nfs-admin@lists.sourceforge.net Message-ID: <01e201c3faf8$a0d67af0$9002a8c0@consensys.com> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01DF_01C3FACE.B7AF6CC0" Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1Avg2E-0003Dn-9w for nfs@lists.sourceforge.net; Tue, 24 Feb 2004 09:07:54 -0800 Received: from [216.187.68.150] (helo=c.pexit.com) by sc8-sf-mx1.sourceforge.net with esmtp (Exim 4.30) id 1Avg1T-0000YP-GR for nfs@lists.sourceforge.net; Tue, 24 Feb 2004 09:07:07 -0800 Received: from consensyxdlcmm (CPE0002b38c45e3-CM000a73663c88.cpe.net.cable.rogers.com [63.139.198.156]) by c.pexit.com (8.11.6/8.11.6) with SMTP id i1OH6ks21739 for ; Tue, 24 Feb 2004 12:06:46 -0500 To: Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: This is a multi-part message in MIME format. ------=_NextPart_000_01DF_01C3FACE.B7AF6CC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi. I'm interested in the knowing what kind of performance numbers people = are getting with NFSv3 synchronous writes. (i.e. what should I be expecting?) My system: RedHat9.0 linux-2.4.20 Dual Intel Xeon P3 1.1Ghz 1GB ram 7-disk Raid5 XFS Filesystem IntelPRO1000 GigE Sequential local writes (rewrites) to a 2GB file on the Raid5 go at over = 100MB/s. But over NFS (v3, sync) it's less than 10MB/s. Is this roughly what's = expected or is something wrong with my setup? As a side note, after modifying some code in the nfs client, nfs server, = and xfs filesystem, I was able to get performance up to ~45MB/s on the 7-disk Raid5 and ~60MB/s on a = 7-disk Raid0. These customizations are still very primitive but they might be worth looking into. I know = the nfs developers are busy, but would they be interested in providing some feedback? Thanks, Alex Wun alexwun@consensys.com Consensys Computers Inc. ------=_NextPart_000_01DF_01C3FACE.B7AF6CC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi.
 
I'm interested in the knowing what kind of = performance=20 numbers people are getting with NFSv3 synchronous writes.
(i.e. what should I be = expecting?)
 
My system:
 
RedHat9.0 linux-2.4.20
Dual Intel Xeon P3 1.1Ghz
1GB ram
7-disk Raid5
XFS Filesystem
IntelPRO1000 GigE
 
Sequential local writes (rewrites) to a 2GB = file on the=20 Raid5 go at over 100MB/s.  But
over NFS (v3, sync) it's less than 10MB/s. Is = this=20 roughly what's expected or is something
wrong with my setup?
 
As a side note, after modifying some = code in the=20 nfs client, nfs server, and xfs filesystem, I was able to
get performance up to ~45MB/s on the = 7-disk Raid5=20 and ~60MB/s on a 7-disk Raid0.  These=20 customizations
are still very primitive but they might = be worth=20 looking into.  I know the nfs developers are busy, but = would
they be interested in providing some=20 feedback?
 
Thanks,
Alex Wun
alexwun@consensys.com<= /FONT>
Consensys Computers = Inc.
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