[Veritas-bu] Preemptive scheduling
2000-10-17 14:42:34
Subject: |
[Veritas-bu] Preemptive scheduling |
From: |
Jonathan Meyer jmeyer AT ptc DOT com |
Date: |
Tue, 17 Oct 2000 14:42:34 -0400 |
Regarding your question about pre-empting incremental backups if the
full schedule runs long. I think "the right thing" to do is less
clear than one might think.
You might have data which you want protected on tape every 12 hours.
The incrementals might not take very long, but the fulls might take
more than 24 hours. In this situation you would want one or more
incrs to take place during the full backup. Performance of both
backups would be effected, but you would get a save to tape every 12
hours. It is my understanding that the netbackup scheduler was
designed to handle the above scenario.
I don't mean to sound like an apologist for veritas, and I have never
wanted the functionality described, but I don't think the scheduler
behavior is as clearly "wrong" as it might seem at first.
--------------------------------------------------
Jonathan Meyer
(781)398-6594
UNIX Systems Administrator
Paramtric Technology Corporation
--------------------------------------------------
From: John_Wang AT enron DOT net
Date: Fri, 13 Oct 2000 17:18:30 -0500
Sender: veritas-bu-admin AT Eng.Auburn DOT EDU
List-Id: Discussion of Veritas Inc. backup related products
<veritas-bu.mailman.eng.auburn.edu>
Hello
Well, seeing how unsuccessful trying to see if anyone managed to do
conditional
expirations was, here's another of my backup favourites.
Can Netbackup do preemptive scheduling?
i.e.: if a full backup is running long (which full backups tend to do) and
therefore into the window for a scheduled incremental for the same drive,
there
is no real need for the incremental to run since the full is really in the
same
time frame anyway so the incremental should be preempted by the full backup
of
the same drive.
Can Netbackup scheduling be configured to do this and if so how?
Regards,
John I Wang
Sr. Systems Engineer
Steverson Information Professionals
---
Enron Broadband Services
3 Allen Center, Room 337C
PH (713) 345-6238
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