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:
1. I want a backup job to run exactly at 3 AM.
a. You can do that with NBU, good windows, and dedicated
resources.
2. I want to tell all my jobs exactly when to run.
a. 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.
3. An external scheduler is already hooked into our overall
reporting mechanism.
a. 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.
---
W. Curtis Preston
Backup Blog @ www.backupcentral.com
VP Data Protection, GlassHouse Technologies
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Greenberg, Katherine (ISD, IT)
Sent: Wednesday, July 25, 2007 10:55 AM
To: veritas-bu@mailman.eng.auburn.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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