DUMP is slow? (5.2.1)

[J.D. Bronson]

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 at aurora.org // Pager: 414.314.8282



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