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Louis-Luc:
The algorithm is as follows:
Media Selection Flow
NetBackup searches for and selects a volume from the media catalog as
follows:
* Media Manager selects a volume on the following basis:
- Is located in the requested storage unit (if applicable)
- Is in the correct volume pool (A volume may be pulled from the scratch
pool if necessary.)
- Is not currently in use
- Is not FULL, FROZEN, IMPORTED, SUSPENDED, or DBBACKUP
* If more than one volume is found, Media Manager selects the volume with
the
least number of mounts.
* If there are no volumes that meet the requirements, the backup is
terminated
with a status (96) error indicating no available media.
* After a volume is mounted, NetBackup checks that the volume has not been
written in a protected format. If the volume has been written, the volume is
unmounted, and the search resumed.
Regards,
Chuck Dufresne
Storage Management Consultant
VERITAS Certified Professional, Data Protection
Strategic Technologies
Email: chuckd AT stratech DOT com
-----Original Message-----
From: veritas-bu-request AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-request AT mailman.eng.auburn DOT edu]
Sent: Monday, May 12, 2003 1:07 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Veritas-bu digest, Vol 1 #2199 - 1 msg
Send Veritas-bu mailing list submissions to
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Today's Topics:
1. What's the rule for tape-picking? (Louis-Luc Le Guerrier)
--__--__--
Message: 1
Date: Mon, 12 May 2003 11:36:15 -0400 (EDT)
From: Louis-Luc Le Guerrier <leguerri AT Canr.Hydro.Qc DOT Ca>
Reply-To: Louis-Luc Le Guerrier <leguerri AT Canr.Hydro.Qc DOT Ca>
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] What's the rule for tape-picking?
Hello,
I'm using NB 3.4, and I have a volume pool with different
tapes available. Let's give an example:
Tape Bytes used Status
000188 5236246 Active
000189 2634674 Active
000190 - Available
000191 - Available
All these tapes are in the same volume pool, and likely to
be picked to put the data of the next backup job.
I have 2 drives, so on the next backup session when jobs
start, I want to use 000188 and 000189 in each drive, until
they're full, before picking another tape.
Usually Volume Manager does it right, but last time in this
example, it picked 000189, and 000191, leaving 000188 behind.
Furthermore, I'd expect 000190 to be used before 000191,
because of numerical order.
Does anyone know the tape picking rule? Or is there a way to
change it? Ideally, I'd like to make the ACTIVE tapes picked
first, then the lower-numbered labelled tapes among the
AVAILABLE ones.
Thank you for any help.
Louis-Luc
P.S.: I'll soon upgrade to NB 4.5, so is there any difference?
--__--__--
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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<META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version =
5.5.2653.12">
<TITLE>RE: What's the rule for tape-picking? (Louis-Luc Le =
Guerrier)</TITLE>
</HEAD>
<BODY>
<P><FONT SIZE=3D2>Louis-Luc:</FONT>
</P>
<P><FONT SIZE=3D2>The algorithm is as follows:</FONT>
</P>
<P><FONT SIZE=3D2>Media Selection Flow</FONT>
<BR><FONT SIZE=3D2>NetBackup searches for and selects a volume from the =
media catalog as follows:</FONT>
<BR><FONT SIZE=3D2>* Media Manager selects a volume on the following =
basis:</FONT>
<BR><FONT SIZE=3D2>- Is located in the requested storage unit (if =
applicable)</FONT>
<BR><FONT SIZE=3D2>- Is in the correct volume pool (A volume may be =
pulled from the scratch</FONT>
<BR><FONT SIZE=3D2>pool if necessary.)</FONT>
<BR><FONT SIZE=3D2>- Is not currently in use</FONT>
<BR><FONT SIZE=3D2>- Is not FULL, FROZEN, IMPORTED, SUSPENDED, or =
DBBACKUP</FONT>
<BR><FONT SIZE=3D2>* If more than one volume is found, Media Manager =
selects the volume with the</FONT>
<BR><FONT SIZE=3D2>least number of mounts.</FONT>
<BR><FONT SIZE=3D2>* If there are no volumes that meet the =
requirements, the backup is terminated</FONT>
<BR><FONT SIZE=3D2>with a status (96) error indicating no available =
media.</FONT>
<BR><FONT SIZE=3D2>* After a volume is mounted, NetBackup checks that =
the volume has not been</FONT>
<BR><FONT SIZE=3D2>written in a protected format. If the volume has =
been written, the volume is</FONT>
<BR><FONT SIZE=3D2>unmounted, and the search resumed.</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>Regards, </FONT>
</P>
<BR>
<P><FONT SIZE=3D2> </FONT>
</P>
<P><FONT SIZE=3D2>Chuck Dufresne </FONT>
<BR><FONT SIZE=3D2>Storage Management Consultant </FONT>
<BR><FONT SIZE=3D2>VERITAS Certified Professional, Data =
Protection</FONT>
<BR><FONT SIZE=3D2>Strategic Technologies </FONT>
<BR><FONT SIZE=3D2>Email: chuckd AT stratech DOT com</FONT>
</P>
<P><FONT SIZE=3D2> </FONT>
<BR><FONT SIZE=3D2> </FONT>
</P>
<BR>
<BR>
<BR>
<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: =
veritas-bu-request AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>[<A =
HREF=3D"mailto:veritas-bu-request AT mailman.eng.auburn DOT edu">mailto:veritas=
-bu-request AT mailman.eng.auburn DOT edu</A>]</FONT>
<BR><FONT SIZE=3D2>Sent: Monday, May 12, 2003 1:07 PM</FONT>
<BR><FONT SIZE=3D2>To: veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>Subject: Veritas-bu digest, Vol 1 #2199 - 1 =
msg</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>Send Veritas-bu mailing list submissions to</FONT>
<BR> <FONT =
SIZE=3D2>veritas-bu AT mailman.eng.auburn DOT edu</FONT>
</P>
<P><FONT SIZE=3D2>To subscribe or unsubscribe via the World Wide Web, =
visit</FONT>
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-bu</A></FONT>
<BR><FONT SIZE=3D2>or, via email, send a message with subject or body =
'help' to</FONT>
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<P><FONT SIZE=3D2>You can reach the person managing the list at</FONT>
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</P>
<P><FONT SIZE=3D2>When replying, please edit your Subject line so it is =
more specific</FONT>
<BR><FONT SIZE=3D2>than "Re: Contents of Veritas-bu =
digest..."</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>Today's Topics:</FONT>
</P>
<P><FONT SIZE=3D2> 1. What's the rule for tape-picking? =
(Louis-Luc Le Guerrier)</FONT>
</P>
<P><FONT SIZE=3D2>--__--__--</FONT>
</P>
<P><FONT SIZE=3D2>Message: 1</FONT>
<BR><FONT SIZE=3D2>Date: Mon, 12 May 2003 11:36:15 -0400 (EDT)</FONT>
<BR><FONT SIZE=3D2>From: Louis-Luc Le Guerrier =
<leguerri AT Canr.Hydro.Qc DOT Ca></FONT>
<BR><FONT SIZE=3D2>Reply-To: Louis-Luc Le Guerrier =
<leguerri AT Canr.Hydro.Qc DOT Ca></FONT>
<BR><FONT SIZE=3D2>To: veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2>Subject: [Veritas-bu] What's the rule for =
tape-picking?</FONT>
</P>
<P><FONT SIZE=3D2>Hello,</FONT>
<BR><FONT SIZE=3D2>I'm using NB 3.4, and I have a volume pool with =
different</FONT>
<BR><FONT SIZE=3D2>tapes available. Let's give an example:</FONT>
</P>
<P><FONT SIZE=3D2>Tape Bytes =
used Status</FONT>
<BR><FONT SIZE=3D2>000188 5236246 =
Active</FONT>
<BR><FONT SIZE=3D2>000189 2634674 =
Active</FONT>
<BR><FONT SIZE=3D2>000190 - =
Available</FONT>
<BR><FONT SIZE=3D2>000191 - =
Available</FONT>
</P>
<P><FONT SIZE=3D2>All these tapes are in the same volume pool, and =
likely to</FONT>
<BR><FONT SIZE=3D2>be picked to put the data of the next backup =
job.</FONT>
<BR><FONT SIZE=3D2>I have 2 drives, so on the next backup session when =
jobs</FONT>
<BR><FONT SIZE=3D2>start, I want to use 000188 and 000189 in each =
drive, until</FONT>
<BR><FONT SIZE=3D2>they're full, before picking another tape.</FONT>
</P>
<P><FONT SIZE=3D2>Usually Volume Manager does it right, but last time =
in this</FONT>
<BR><FONT SIZE=3D2>example, it picked 000189, and 000191, leaving =
000188 behind.</FONT>
<BR><FONT SIZE=3D2>Furthermore, I'd expect 000190 to be used before =
000191, </FONT>
<BR><FONT SIZE=3D2>because of numerical order.</FONT>
</P>
<P><FONT SIZE=3D2>Does anyone know the tape picking rule? Or is there a =
way to</FONT>
<BR><FONT SIZE=3D2>change it? Ideally, I'd like to make the ACTIVE =
tapes picked</FONT>
<BR><FONT SIZE=3D2>first, then the lower-numbered labelled tapes among =
the</FONT>
<BR><FONT SIZE=3D2>AVAILABLE ones.</FONT>
</P>
<P><FONT SIZE=3D2>Thank you for any help.</FONT>
<BR><FONT SIZE=3D2>Louis-Luc</FONT>
</P>
<P><FONT SIZE=3D2>P.S.: I'll soon upgrade to NB 4.5, so is there any =
difference?</FONT>
</P>
<BR>
<BR>
<P><FONT SIZE=3D2>--__--__--</FONT>
</P>
<P><FONT =
SIZE=3D2>_______________________________________________</FONT>
<BR><FONT SIZE=3D2>Veritas-bu maillist - =
Veritas-bu AT mailman.eng.auburn DOT edu</FONT>
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HREF=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu"; =
TARGET=3D"_blank">http://mailman.eng.auburn.edu/mailman/listinfo/veritas=
-bu</A></FONT>
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