[Veritas-bu] Towers of Hanoi type differential

Hello Hal

Thanks,  I'm coming to the same conclusion.   I'm thinking of doing incrementals
and cumulatives, both with two day frequencies and to different volume pools and
a weekend full to reset the sequence.   Normally I like to do fulls as
infrequently as possible since they are the ones that do not scale and if I only
do fulls once a month, I can let them spread out and load balance themselves
over all the weekends in a given month; however this site already does weekly
fulls so staying with that would not be a problem.   The goal is redundancy
against any single failure and a failed 50 Gbyte AIT tape can affect a lot of
backups.   Too bad we can't define class specific differentials ie.: have the
differentials backup what's changed since the last backup in the same class
because then alternately scheduled classes with different volume pools would be
all that's required.

Regards,
John I Wang
Sr. Systems Engineer
Steverson Information Professionals

---
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PH (713) 345-6238


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  |                                                                            |
  |       To:     John Wang/Contractor/Enron Communications@Enron              |
  |       Communications                                                       |
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  |       Subject:     Re: [Veritas-bu] Towers of Hanoi type differential      |
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Oops, I'm reading 2 lists (Networker and Netbackup) and got confused.  No,
there is no way to do TOH in Netbackup.  You might want to investigate a
simple scheme (assuming weekly fulls) of: F-I-C-I-C-I-C  and how your backup
load (how much changes in a file system over what period of time).  You
may be able to get more consistant recovery this way.
Hal


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