|
Re: Is there a log that tells me the block size of a Backup Job
2008-07-25 19:39:08
On Fri, 25 Jul 2008 at 4:33pm, Doyle Collings wrote
I put two more ISO images in my backup folder. I am now backing up
5.4783 GB. My previous math of the 5.5 GB a minute using tar was
flawed. With tar I am able to backup the 5.4783 GB of files in under
two minutes. I ran the Amanda "fullback" backup with the new
configuration...sitting front of the server with my watch in hand.
Because the holding disk is larger than my backup size, Amanda backed
the job up to the holding disk before the tape drive started writing.
It took nine minutes to write to the holding disk. Then the tape started
writing. It took only about three minutes to go from holding disk to
tape. 12 minutes total for 5.5 gigabytes. It appears that the problem
is not in the tape write speed, but what is happening on the server to
prepare and backup the data for the holding disk.
As an aside, why are you timing this by hand? Amanda should be sending
you an email with all the details in it (including speed in dumping to
holding disk and speed writing to tape). You *want* those emails.
--
Joshua Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
|
|
|
