From owner-freebsd-geom@FreeBSD.ORG Wed Mar 28 12:36:10 2007 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 733CB16A402 for ; Wed, 28 Mar 2007 12:36:10 +0000 (UTC) (envelope-from anderson@freebsd.org) Received: from mh1.centtech.com (moat3.centtech.com [64.129.166.50]) by mx1.freebsd.org (Postfix) with ESMTP id 3FD1213C465 for ; Wed, 28 Mar 2007 12:36:09 +0000 (UTC) (envelope-from anderson@freebsd.org) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh1.centtech.com (8.13.8/8.13.8) with ESMTP id l2SCa9bI064736; Wed, 28 Mar 2007 07:36:09 -0500 (CDT) (envelope-from anderson@freebsd.org) Message-ID: <460A6139.4040401@freebsd.org> Date: Wed, 28 Mar 2007 07:36:09 -0500 From: Eric Anderson User-Agent: Thunderbird 1.5.0.10 (X11/20070320) MIME-Version: 1.0 To: =?ISO-8859-1?Q?Szab=F3_P=E9ter?= References: <003401c7712a$f71ebb60$6502a8c0@peteruj> <005c01c77134$28e0fce0$6502a8c0@peteruj> In-Reply-To: <005c01c77134$28e0fce0$6502a8c0@peteruj> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Virus-Scanned: ClamAV 0.88.4/2946/Wed Mar 28 04:36:58 2007 on mh1.centtech.com X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=8.0 tests=BAYES_00 autolearn=ham version=3.1.6 X-Spam-Checker-Version: SpamAssassin 3.1.6 (2006-10-03) on mh1.centtech.com Cc: freebsd-geom@freebsd.org Subject: Re: raid3 is slow X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Mar 2007 12:36:10 -0000 On 03/28/07 07:25, Szabó Péter wrote: > Yes, consumers are the disks. [..snip..] > #systat -vmstat > > 4 users Load 1.62 1.75 1.82 Mar 28 14:24 > > Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER > Tot Share Tot Share Free in out in out > Act 66488 6968 150740 11396 31172 count > All 1017076 10160975701764 16256 pages > 1 zfod Interrupts > Proc:r p d s w Csw Trp Sys Int Sof Flt cow 4066 total > 1 60 9820 68312106 4237 752 1 195968 wire 1002 0: clk > 79088 act 128 8: rtc > 89.2%Sys 3.0%Intr 3.3%User 0.0%Nice 4.5%Idl 714076 inact 10 10: > fxp > | | | | | | | | | | 29068 cache 1780 11: > ata > =============================================+>> 2104 free 573 14: > ata > 12 daefr 573 15: > ata > Namei Name-cache Dir-cache prcfr > Calls hits % hits % react > 11 10 91 1 pdwake > 4045 pdpgs > Disks ad0 ad1 ad2 ad3 ad6 intrn > KB/t 8.42 8.42 8.42 8.42 5.67 113904 buf > tps 287 287 287 287 1780 133 dirtybuf > MB/s 2.36 2.36 2.36 2.36 9.85 69984 desiredvnodes > % busy 25 26 24 26 99 21586 numvnodes > 17495 freevnodes > > I use mc to copy. > > Matyee Can you send the output of: diskinfo -vt /dev/raid3/nmivol diskinfo -vt /dev/label/nmivol1 Thanks Eric >> Szabó Péter wrote: >> >>> I have a raid3 setup with 5 consumers. it seems everything is all right, >>> but riad is very slow imho, but i don't have any >reference. >> You need to give more accurate information. What are the "consumers" you >> mention? Maybe you mean the disks/components of the RAID? >> >>> Now i copy from raid3 to a single hdd 75GB data. Nothing else run, except >>> ssh, and ftp. Before the copy my load is >0.1, after i star the copy the >>> load is 2.92 or higher, and the machine is very slow. I think this is not >>> normal, or is it? >>> Copy how? By "cp" from shell? >>> My config is: >>> AMD Barton 2500+ with 1GB memory. >>> >>> I stop the copy, load is 0.05, and start again, after a few seconds load >>> is 2.02. > >> Due to the way raid3 works, it's by definition more CPU-intensive than >> most other RAID levels, but it shouldn't be even remotely slow as that. >> Also, since your load is > 2, what are the other CPU intensive tasks? > > _______________________________________________ > freebsd-geom@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-geom > To unsubscribe, send any mail to "freebsd-geom-unsubscribe@freebsd.org"