Date: Fri, 18 Feb 2000 15:11:06 -0800 (PST) From: Tom <tom@uniserve.com> To: "Daniel C. Sobral" <dcs@newsguy.com> Cc: Brad Knowles <blk@skynet.be>, freebsd-stable@FreeBSD.ORG Subject: Re: Initial performance testing w/ postmark & softupdates... Message-ID: <Pine.BSF.4.05.10002181508390.1712-100000@shell.uniserve.ca> In-Reply-To: <38ACADD6.E8566B65@newsguy.com>
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On Fri, 18 Feb 2000, Daniel C. Sobral wrote: > > I also notice that softupdates on a slow disk beat out > > Linux/ext2fs+async on a single CPU system that was otherwise > > similarly configured, except for the DPT SmartRAID V controller that > > the Linux server had to it's advantage, and the 5-way RAID-5 volume > > that it was writing to. > > DPT is known to be slow, and write performance on RAID-5 is lower than > on single-disk. Big difference between DPT SmartRAID IV, and SmartRAID V. You are probably referring to the IV. BTW, I found the performance of SmartRAID IV on a single disk using postmark with the 1000/50000 test to be 20% faster than a single disk. SmartRAID cards in general usually handle postmark quite well. > -- > Daniel C. Sobral (8-DCS) > dcs@newsguy.com > dcs@freebsd.org > > "If you consider our help impolite, you should see the manager." > > > > Tom Uniserve To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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