Date: 17 Jun 1999 15:50:10 +0300 From: Ville-Pertti Keinonen <will@iki.fi> To: grog@lemis.com (Greg Lehey) Cc: hackers@freebsd.org Subject: Re: vinum performance Message-ID: <86r9nbq9dp.fsf@not.demophon.com> In-Reply-To: grog@lemis.com's message of "17 Jun 1999 12:02:50 %2B0300" References: <199906170743.DAA16929@cs.rpi.edu> <19990617183225.Q9893@freebie.lemis.com>
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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. > > 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. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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