Date: Fri, 18 Jun 1999 06:23:03 +0930 From: Greg Lehey <grog@lemis.com> To: Ville-Pertti Keinonen <will@iki.fi> Cc: hackers@freebsd.org Subject: Re: vinum performance Message-ID: <19990618062303.T9893@freebie.lemis.com> In-Reply-To: <86r9nbq9dp.fsf@not.demophon.com>; from Ville-Pertti Keinonen on Thu, Jun 17, 1999 at 03:50:10PM %2B0300 References: <199906170743.DAA16929@cs.rpi.edu> <19990617183225.Q9893@freebie.lemis.com> <86r9nbq9dp.fsf@not.demophon.com>
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On Thursday, 17 June 1999 at 15:50:10 +0300, Ville-Pertti Keinonen wrote: > > grog@lemis.com (Greg Lehey) writes: > >>> You've accidentally striped subdisks on the same drive? ;--) >>> >>> Like Greg Lehey said, you haven't really provided enough details. >> >> He did provide one detail, though; this is a concatenated plex, not a >> striped one. > > Or he at least *thinks* it's concatenated. ;--) I didn't miss that - > but given numbers that bad, it sounds like there might be some really > silly mistake involved. OK, you're the second person to say that. Let's wait until he comes back with more details. >>> Many disks are shipped with write caching disabled, and write >>> performance can be significantly worse than read performance. >> >> Not if it works without Vinum. > > My thought was that he might be comparing read performance and write > performance (they are often pretty close). But even so, the > difference shouldn't be *that* big. I'm sure there's something wrong here. I'd just like to find out what it is. I don't think it's with Vinum, but I'm prepared to be proven wrong. 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-hackers" in the body of the message
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