On 9/12/07, Yu Chen <chen AT hhmi.umbc DOT edu> wrote:

Actually this is where puzzled me. My server is my client as well, so
basically it dumps itself. The disks are on a RAID 5 array directly
connected to the server through SCSI. But it seems it never can keep up
with the tape. Don't know where I missed something or is this right?

Ah -- in that case you probably want to avoid holding-disk altogether.
Chris posted on the topic just a few minutes ago, but basically your
RAID-5 is being asked to work overtime -- read (as client), write (to
holding), and read (from holding).  If you move holding to another
disk -- a single fast drive, or a RAID1 array, or the like, you should
see your performance improve.

Thanks, Dustin and Chris.

Chen

Dustin

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Yu Chen
Howard Hughes Medical Institute
Chemistry Building, Rm 182
University of Maryland at Baltimore County
1000 Hilltop Circle
Baltimore, MD 21250

phone:  (410)455-1728 (primary)
        (410)455-6347 (secondary)
fax:    (410)455-1174
email:  chen AT hhmi.umbc DOT edu
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