From owner-freebsd-performance@FreeBSD.ORG Wed Jun 18 11:53:09 2003 Return-Path: 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 0555937B401 for ; Wed, 18 Jun 2003 11:53:09 -0700 (PDT) Received: from mta1.lbl.gov (mta1.lbl.gov [128.3.41.24]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5079743F75 for ; Wed, 18 Jun 2003 11:53:08 -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 h5IIqxIs015752 for ; Wed, 18 Jun 2003 11:53:04 -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 h5IIquAs015742; Wed, 18 Jun 2003 11:52:56 -0700 (PDT) Sender: jin@lbl.gov Message-ID: <3EF0B507.2B1B6FDF@lbl.gov> Date: Wed, 18 Jun 2003 11:52:55 -0700 From: "Jin Guojun [DSD]" 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: agent dero References: <20030614190033.7F0DE37B407@hub.freebsd.org> <20030615091254.M85497@bluhayz.org> 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Jun 2003 18:53:09 -0000 agent dero wrote: > I have been researching RAID and Software RAID online using FreeBSD's > availible documents, and I am wondering what the performance of using a > simple RAID 1 capable card over a software RAID 1 configuration? Will the > software RAID perform well enough that I could just cut costs of a RAID card? > > thanks. Recently, we tested software RAID via CCD and VINUM, and compared them to adaptec 2xxx RAID controller. The performance is the same. The CPU are Xeon 2.8 GHz, SuperMicro MB with ServerWork Chipset. Seagate 3147xxxxLC drives. Problem is the write is slow for all of them, especially when multiple writes. Heard from Adaptect that their 5400 RAID has best performance, but never had one for testing. So, soft RAID is ok to save bucks for hardware. -- ------------ Jin Guojun ----------- v --- j_guojun@lbl.gov --- Distributed Systems Department http://www.itg.lbl.gov/~jin M/S 50B-2239 Ph#:(510) 486-7531 Fax: 486-6363 Lawrence Berkeley National Laboratory, Berkeley, CA 94720