I scripted the import of several hundred SDLT Media running a simple
script.  I output the entries of the Phase I import to a text file
called <mediaID>.txt and  wrote a perl script to read that in and create
an excel file with the media id, date of the backup and what server was
backed up.  I then used a pivot chart to combine what servers had
backups available for what days / months / years.  As and when someone
makes a request I run a phase II import only on the images required,
then restore the data.  

 

My suggestions are as follows:

1) Watch the tape drives; I had the occasional media get "stuck."  I
think, due to bad media.  The issue would cause the whole process to
hang.

2) I had a huge library with over 300 slots and a media server dedicated
to this effort.  I'm sure a smaller library would have been a major
pain.

3) Write a script or look for phase I logs that are very small - these
are usually errors (in my case anyway)

 

I can send you my scripts but they are just simple for loops, looking at
a list of media that I loaded.  On SDLT (110GB / 220GB Compressed) the
Phase I's took a little better than an hour per (we multiplexed 4x
/sigh) and the phase IIs take 4-8 hours depending.  I'm sure LTOs would
take longer, so good luck!

 

-Jonathan

 

________________________________

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Esson,
Paul
Sent: Thursday, June 12, 2008 8:22 PM
To: veritas-bu@mailman.eng.auburn.edu
Subject: [Veritas-bu] bulk import of images

 

Folks,

 

Anybody out there successfully automated a large volume import of tape
media into NetBackup?  I am curious as to how you controlled the
processing, given the potential conflict in using available tapes drives
for example and how you validated the success of the phases of the
import.  We have several hundred tapes to process (800+). I am also
looking for indications as to how long a phase 1 and phase 2 import will
take on LTO-1 media with close to 2:1 compression (190+ GB).  We have
multiplexed media and 2 GB fragment sizes which I imagine will slow
things down too.

 

Regards,

 

Paul Esson 
Redstor Limited 

Direct:               +44 (0) 1224 595381 
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E-Mail:          [EMAIL PROTECTED] 
Web:            www.redstor.com 

REDSTOR LIMITED 
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UK 
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