[Veritas-bu] RE: What's the rule for tape-picking? (Louis-Luc Le Guerrier)
2003-05-12 14:53:48
Subject: |
[Veritas-bu] RE: What's the rule for tape-picking? (Louis-Luc Le Guerrier) |
From: |
ddunham AT taos DOT com (Darren Dunham) |
Date: |
Mon, 12 May 2003 11:53:48 -0700 (PDT) |
> 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.
That can't be the only criteria. Otherwise a library with a bunch of
new tapes (0 mounts) would use every tape once before using any of them
a second time. That's not what I observe.
--
Darren Dunham ddunham AT taos DOT com
Unix System Administrator Taos - The SysAdmin Company
Got some Dr Pepper? San Francisco, CA bay area
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