From owner-freebsd-hackers Thu Jun 17 1:11:38 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (Postfix) with ESMTP id 2B200150F5 for ; Thu, 17 Jun 1999 01:11:33 -0700 (PDT) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id RAA03673; Thu, 17 Jun 1999 17:41:31 +0930 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.3/8.9.0) id RAA51596; Thu, 17 Jun 1999 17:41:38 +0930 (CST) Date: Thu, 17 Jun 1999 17:41:36 +0930 From: Greg Lehey To: Pavel Narozhniy Cc: "David E. Cross" , freebsd-hackers@FreeBSD.ORG Subject: Re: vinum performance Message-ID: <19990617174135.M9893@freebie.lemis.com> References: <199906170743.DAA16929@cs.rpi.edu> <3768ABD4.FD515328@sim.net.ua> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.4i In-Reply-To: <3768ABD4.FD515328@sim.net.ua>; from Pavel Narozhniy on Thu, Jun 17, 1999 at 11:03:32AM +0300 WWW-Home-Page: http://www.lemis.com/~grog X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thursday, 17 June 1999 at 11:03:32 +0300, Pavel Narozhniy wrote: > "David E. Cross" wrote: >> >> I have a drive that is rated at ~16 Meg/second, and indeed it delivers on the >> order of 15+ Meg/second. If I use Vinum to create a concatinated device >> of 2 such units performance drops to 2.5 Meg/sec. This seems like a >> drastic drop in performance. Any ideas what I am doin incorrectly? > > Try to place those drives on two different SCSI controllers. That wouldn't be the problem with a concatenated plex. 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