Date: Wed, 07 Apr 2004 16:24:17 -0500 From: "J.D. Bronson" <jbronson@wixb.com> To: freebsd-questions@freebsd.org Subject: DUMP is slow? (5.2.1) Message-ID: <6.1.0.5.2.20040407161942.00bd3f28@cheyenne.wixb.com>
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This is a multi-part message in MIME format... ------------=_1081373057-7407-790 Content-Type: text/plain; charset="us-ascii"; format=flowed Content-Disposition: inline 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: Date of last level 0 dump: the epoch DUMP: Dumping snapshot of /dev/da0s1g (/home) to standard output DUMP: mapping (Pass I) [regular files] DUMP: Cache 32 MB, blocksize = 65536 DUMP: mapping (Pass II) [directories] DUMP: estimated 282911 tape blocks. DUMP: dumping (Pass III) [directories] DUMP: dumping (Pass IV) [regular files] warning: ./.snap: File exists DUMP: DUMP: 283002 tape blocks DUMP: finished in 45 seconds, throughput 6288 KBytes/sec DUMP: DUMP IS DONE ..that seems a bit slow for SCSI.... So now I try the EXACT same thing on another identical machine with the same cards/drives/ram..et (these machines are clones)...but this one runs solaris.... # ufsdump -0f - /export/home | ( cd /mnt6 ; ufsrestore xf - ) DUMP: Date of this level 0 dump: Wed Apr 07 16:18:57 2004 DUMP: Date of last level 0 dump: the epoch DUMP: Dumping /dev/rdsk/c0t0d0s6 (cheyenne:/export/home) to standard output. DUMP: Mapping (Pass I) [regular files] DUMP: Mapping (Pass II) [directories] DUMP: Writing 32 Kilobyte records DUMP: Estimated 571042 blocks (278.83MB). DUMP: Dumping (Pass III) [directories] DUMP: Dumping (Pass IV) [regular files] Warning: ./lost+found: File exists DUMP: 571006 blocks (278.81MB) on 1 volume at 22362 KB/sec DUMP: DUMP IS DONE That speed seems more reasonable. Is there any reason that the FreeBSD machine is so much slower? - thanks :) -- J.D. Bronson Aurora Health Care // Information Services // Milwaukee, WI USA Office: 414.978.8282 // Email: jd@aurora.org // Pager: 414.314.8282 ** DISCLAIMER ** Per Anti-Virus Policy, this e-email has been scanned for viruses. Scanned clean by F-PROT ANTIVIRUS 4.4.1 - http://www.f-prot.com ------------=_1081373057-7407-790--
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