Date: Wed, 13 Dec 2000 21:31:36 -0600 From: "Michael C . Wu" <keichii@iteration.net> To: "Jason C. Wells" <jcwells@nwlink.com> Cc: Brad Knowles <blk@skynet.be>, chat@FreeBSD.ORG, Greg Lehey <grog@lemis.com> Subject: Re: Very interesting benchmarking results... Message-ID: <20001213213136.A20457@peorth.iteration.net> In-Reply-To: <Pine.SOL.3.96.1001213160828.87C-100000@utah>; from jcwells@nwlink.com on Wed, Dec 13, 2000 at 04:27:54PM -0800 References: <v04220802b65db6f83bd5@[10.0.1.2]> <Pine.SOL.3.96.1001213160828.87C-100000@utah>
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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
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