While I agree with Justin’s
response, I really don’t like using external schedulers for NetBackup
unless absolutely necessary. The only real requirement I can think of that
would force me to an external scheduler is multi-host dependencies, because
external schedulers are really good at that.
I’ve seen the following justifications:
- I
want a backup job to run exactly at 3 AM.
- You
can do that with NBU, good windows, and dedicated resources.
- I
want to tell all my jobs exactly when to run.
- Why?
Stop over engineering your backup environment. Let go and let Symantec. ;)
You’ll be amazed at how well run a NBU environment can be if you
just give all your backups the same window, the same resources, and just
set priorities. It’s a beautiful thing and requires VERY little
maintenance.
- An
external scheduler is already hooked into our overall reporting mechanism.
- Lousy
excuse to cripple the NBU scheduler. Spend the time necessary to hook
NBU into your overall reporting mechanism.
Short of the one valid reason I’ve
seen (multi-host dependencies), you’ll never approach the level of
resource utilization and efficiency that the NetBackup scheduler can give you
by using an external scheduler. For example, while NBU can have thousands of
queued jobs waiting for resource (to make sure that something is always using
the tape drives) without consuming any additional resources, doing that with an
external scheduler is impossible.
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Greenberg, Katherine (ISD, IT)
Sent: Wednesday, July 25, 2007
10:55 AM
To:
veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Priority w/
an External Scheduler?
Have you guys ever used an external scheduler?
I'm trying to figure out if that impacts Policy
Prioritization or not.
Since our backups aren't scheduled thru NetBackup (there are
schedules, but no windows) does prioritization come into play or no?
We're running 5.1 MP6.
TIA,
Kate
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