From owner-freebsd-hackers Thu Apr 6 19:27:55 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id TAA18905 for hackers-outgoing; Thu, 6 Apr 1995 19:27:55 -0700 Received: from ref.tfs.com (ref.tfs.com [140.145.254.251]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id TAA18899 for ; Thu, 6 Apr 1995 19:27:53 -0700 Received: (from phk@localhost) by ref.tfs.com (8.6.8/8.6.6) id TAA15629; Thu, 6 Apr 1995 19:27:03 -0700 From: Poul-Henning Kamp Message-Id: <199504070227.TAA15629@ref.tfs.com> Subject: Re: large filesystems/multiple disks [RAID] To: babkin@hq.icb.chel.su (Serge A. Babkin) Date: Thu, 6 Apr 1995 19:27:01 -0700 (PDT) Cc: terry@cs.weber.edu, freebsd-hackers@FreeBSD.org In-Reply-To: <199504071321.IAA00249@hq.icb.chel.su> from "Serge A. Babkin" at Apr 7, 95 08:21:30 am Content-Type: text Content-Length: 527 Sender: hackers-owner@FreeBSD.org Precedence: bulk > Yes. But mirroring gives additional throughput increase for reading > like stripping (and decrease for writing unlike it :-( ). But from > my experience big databases are much more often read than written, > aren't they ? No. In most mixes I've run mirroring ends up having no net impact on the speed. The two effects cancel each other out. -- Poul-Henning Kamp -- TRW Financial Systems, Inc. 'All relevant people are pertinent' && 'All rude people are impertinent' => 'no rude people are relevant'