From owner-freebsd-performance@FreeBSD.ORG  Wed Jun 18 13:26:14 2003
Return-Path: <owner-freebsd-performance@FreeBSD.ORG>
Delivered-To: freebsd-performance@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 2421137B401
	for <freebsd-performance@freebsd.org>;
	Wed, 18 Jun 2003 13:26:14 -0700 (PDT)
Received: from mta1.lbl.gov (mta1.lbl.gov [128.3.41.24])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 6447F43FBD
	for <freebsd-performance@freebsd.org>;
	Wed, 18 Jun 2003 13:26:13 -0700 (PDT)
	(envelope-from j_guojun@lbl.gov)
Received: from mta1.lbl.gov (localhost [127.0.0.1])
	by mta1.lbl.gov (8.12.9/8.12.9) with ESMTP id h5IKQ7Is001282
	for <freebsd-performance@freebsd.org>;
	Wed, 18 Jun 2003 13:26:11 -0700 (PDT)
Received: from lbl.gov (gracie.lbl.gov [131.243.2.175])
	by mta1.lbl.gov (8.12.9/8.12.9) with ESMTP id h5IKQ5As001269;
	Wed, 18 Jun 2003 13:26:05 -0700 (PDT)
Sender: jin@lbl.gov
Message-ID: <3EF0CADD.B096A242@lbl.gov>
Date: Wed, 18 Jun 2003 13:26:05 -0700
From: "Jin Guojun [DSD]" <j_guojun@lbl.gov>
X-Mailer: Mozilla 4.76 [en] (X11; U; FreeBSD 4.7-RELEASE i386)
X-Accept-Language: zh, zh-CN, en
MIME-Version: 1.0
To: Eric Anderson <anderson@centtech.com>
References: <20030614190033.7F0DE37B407@hub.freebsd.org>
	<20030615091254.M85497@bluhayz.org> <3EF0B507.2B1B6FDF@lbl.gov>
	<3EF0C5FA.302@centtech.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
cc: freebsd-performance@freebsd.org
Subject: Re: freebsd-performance Digest, Vol 4, Issue 7
X-BeenThere: freebsd-performance@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Performance/tuning <freebsd-performance.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-performance>,
	<mailto:freebsd-performance-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-performance>
List-Post: <mailto:freebsd-performance@freebsd.org>
List-Help: <mailto:freebsd-performance-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-performance>,
	<mailto:freebsd-performance-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 18 Jun 2003 20:26:14 -0000

Eric Anderson wrote:

> > Very minimum.
> > It was slow on SCSI bus , but I do not have time to diagnose,
> > which can be very time consuming.
>
> My tests have shown that a GOOD hardware RAID5 controller can really
> help you out when it's being slammed (specially over NFS) - I use Dell
> PERC/2 and PERC/3 controllers (rebranded AMI RAID boards).  They run
> like champs, and I get 40MB/s sustained xfers..

What did you mean sustained xfers ? -- in and out, or just read out.

    -Jin