Date: Thu, 8 Apr 2004 10:29:00 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: "J.D. Bronson" <jbronson@wixb.com> Cc: freebsd-questions@freebsd.org Subject: Re: DUMP is slow? (5.2.1) Message-ID: <20040408005900.GO23860@wantadilla.lemis.com> In-Reply-To: <6.1.0.5.2.20040407161942.00bd3f28@cheyenne.wixb.com> References: <6.1.0.5.2.20040407161942.00bd3f28@cheyenne.wixb.com>
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--yruHGtsrg8HLSUpe Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wednesday, 7 April 2004 at 16:24:17 -0500, J.D. Bronson wrote: > I am dumping about 284MB... > > Now here is what I did... > > 1. identical drives on the same Adaptec 29160 controller > 2. Each drive is sliced and formatted the same > 3. I ran 'tunefs -n enable' > 4. Mounted drive 2 as /mntg > > > Then as root do this: > # dump -C 32 -0Lf - /home | ( cd /mntg ; restore xf - ) > DUMP: Date of this level 0 dump: Wed Apr 7 16:17:13 2004 > .. > DUMP: finished in 45 seconds, throughput 6288 KBytes/sec > > ..that seems a bit slow for SCSI.... You're creating a whole lot of files in the process. Without the restore it would probably be faster. > # ufsdump -0f - /export/home | ( cd /mnt6 ; ufsrestore xf - ) > ... > DUMP: 571006 blocks (278.81MB) on 1 volume at 22362 KB/sec > > That speed seems more reasonable. > > Is there any reason that the FreeBSD machine is so much slower? Different hardware, I would imagine. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply or reply to the original recipients. For more information, see http://www.lemis.com/questions.html Note: I discard all HTML mail unseen. Finger grog@FreeBSD.org for PGP public key. See complete headers for address and phone numbers. --yruHGtsrg8HLSUpe Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQFAdKPUIubykFB6QiMRAlLIAJwKP8BNQLwBjaSCUQCLmqWG+e8yaQCfd1wu ijgCV8dx/A2p31USQMcCx+Q= =0WbM -----END PGP SIGNATURE----- --yruHGtsrg8HLSUpe--
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