Date: Mon, 22 Mar 1999 09:00:15 +1030 From: Greg Lehey <grog@lemis.com> To: Tom <tom@sdf.com> Cc: Nick Hilliard <nick@iol.ie>, freebsd-scsi@FreeBSD.ORG Subject: Re: dpt raid-5 performance Message-ID: <19990322090015.S429@lemis.com> In-Reply-To: <Pine.BSF.4.05.9903211252070.24283-100000@misery.sdf.com>; from Tom on Sun, Mar 21, 1999 at 12:54:23PM -0800 References: <19990321084436.Z429@lemis.com> <Pine.BSF.4.05.9903211252070.24283-100000@misery.sdf.com>
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On Sunday, 21 March 1999 at 12:54:23 -0800, Tom wrote: > > On Sun, 21 Mar 1999, Greg Lehey wrote: > >>> FreeBSD will likely never send IOs big enough for the strip size of >>> 512kb to ever be useful. >> >> It does. The largest I/O transfer is 64 kB. You don't want to >> fragment requests, because that increases the I/O load on the array. > > At the cost of single-process performance. I don't know what you mean here. Can you explain that statement? Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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