From owner-freebsd-chat Wed Dec 13 19:31:42 2000 From owner-freebsd-chat@FreeBSD.ORG Wed Dec 13 19:31:39 2000 Return-Path: Delivered-To: freebsd-chat@freebsd.org Received: from peorth.iteration.net (peorth.iteration.net [208.190.180.178]) by hub.freebsd.org (Postfix) with ESMTP id CB6A837B69B for ; Wed, 13 Dec 2000 19:31:21 -0800 (PST) Received: by peorth.iteration.net (Postfix, from userid 1001) id 67E4657443; Wed, 13 Dec 2000 21:31:36 -0600 (CST) Date: Wed, 13 Dec 2000 21:31:36 -0600 From: "Michael C . Wu" To: "Jason C. Wells" Cc: Brad Knowles , chat@FreeBSD.ORG, Greg Lehey Subject: Re: Very interesting benchmarking results... Message-ID: <20001213213136.A20457@peorth.iteration.net> Reply-To: "Michael C . Wu" References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from jcwells@nwlink.com on Wed, Dec 13, 2000 at 04:27:54PM -0800 X-PGP-Fingerprint: 5025 F691 F943 8128 48A8 5025 77CE 29C5 8FA1 2E20 X-PGP-Key-ID: 0x8FA12E20 Sender: keichii@peorth.iteration.net Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, Dec 13, 2000 at 04:27:54PM -0800, Jason C. Wells scribbled: | I thought hardware raid was supposed to be much better. These graphs show | this raid card as a fractional performer. The difference is so staggering | I had to double check that your graphs were referenced to zero to make | sure you hadn't played any graphing tricks. | | Aside from the better numbers that vinum produces, I am surprised that the | raid card performance remained flat for an increased number of processes. | I am no expert, but that looks like something just ain't right with the | card. Shouldn't throughput approach the aggregate throughput of the SCSI | channel(s)? | | Does this manufacturer just suck or is the superiority of hardware raid a myth? Brad failed to post the simultaneous CPU times at the same time. i.e. at 128 processes, how much CPU time was doing I/O? Also, how much memory was the processes taking? -- +------------------------------------------------------------------+ | keichii@peorth.iteration.net | keichii@bsdconspiracy.net | | http://peorth.iteration.net/~keichii | Yes, BSD is a conspiracy. | +------------------------------------------------------------------+ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message