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Re: Performance issues
2008-09-25 09:27:05
On Wed, 24 Sep 2008 at 6:10pm, Jamie Penman-Smithson wrote
I'm trying to understand why amanda (v2.6.0p2, on RHEL4) is taking so
long to backup just 60 Gb, the actual taping appears to only take a
fraction of the time. I've double checked that compression is not
enabled and in the report (see below) the estimation takes a grand total
of 0 minutes. Actually writing the data to tape only took 35 minutes,
the dump time was over 4 hours, over 11 hours without using a holding
disk (holdingdisk never).
The tape server and client are one and the same, it's backing up a local
filesystem.
What kind of hardware are we talking about here? How exactly are your
disks set up? Where is the holding disk in relation to the filesystem
being backed up? What does the data look like (i.e., are there a few big
files, or *lots* of small files)? What type of tape drive?
--
Joshua Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
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