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:
veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu]
On Behalf Of Esson, Paul
Sent: Thursday, June 12, 2008 8:22
PM
To:
veritas-bu AT mailman.eng.auburn DOT 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
Mobile:
+44 (0) 7766 906514
E-Mail:
paul.esson AT redstor DOT com
Web:
www.redstor.com
REDSTOR LIMITED
Torridon House
73-75 Regent Quay
Aberdeen
UK
AB11 5AR
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