Date: Fri, 30 May 2003 17:41:39 +0200 From: "Per olof Ljungmark" <peo@intersonic.se> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-questions@freebsd.org Subject: Re: Vinum performance Message-ID: <3ED77BB3.4080900@intersonic.se> In-Reply-To: <3ED77728.8080009@mac.com> References: <3ED72156.1070905@intersonic.se> <20030530101845.GG40976@wantadilla.lemis.com> <3ED74FF4.2010905@intersonic.se> <3ED77728.8080009@mac.com>
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> What ratio of reads to writes do you expect? Had no expectations really, I'm new to Vinum. >> Copying 170 files total 319MB TO the Vinum volume takes about 2m45s. >> Copying same files FROM the Vinum volume to another volume on a >> hardware raid5 controller takes 43s. > > > A 3-1 ratio in speeds for software RAID-5 versus hardware doesn't strike > me as being very wrong.... > >> This machine is not in production yet so I can still make changes to >> the configuration. The current block size is 16384 and the stripe size >> 419k. I assume it would be a good idea to change that to for example >> 491,520? > > > ...or try a few stripe sizes, such as 64K or 128K. > Chuck, Thanks for your comments, I felt it was a good idea just to check before we start to use this piece seriously then I will not be able to touch it for changing configuration. Will try different stripe sizes as per your advice. /per olof
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