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Re: [Veritas-bu] Synthetic Backups
2009-07-07 20:41:48
I see what you mean. But I suspect that's just a poorly worded paragraph.
The diagram on page 200 of the Admin Guide (Vol 1, Windows version) indicates the original full is not required ongoing.
I wish I could say for sure from experience, but I've never been able to get synthetic backups working at all :(
Cheers,
Dean
On Wed, Jul 8, 2009 at 10:21 AM, A Darren Dunham <ddunham AT taos DOT com> wrote:
On Wed, Jul 08, 2009 at 10:11:46AM +1000, Dean wrote:
> >From what I've read, and from what Curtis says below, you DON'T need to keep
> the original full backup around, once you've created at least one more
> synethtic full backup. You can do just one full backup, then keep creating
> synthetic fulls by merging the previous synthetic full with incrementals,
> forever. The original full backup does not need to be retained as long is
> there is always at least one unexpired synthetic full available.
That is not what the admin guide says (I'm looking at Admin guide 1 for
UNIX NBU 6.5, page 128). I had assumed this would be possible, but it
says a non-synthetic full must be used as the source.
Synthetic backup
A synthetic full or synthetic cumulative incremental backup is a
backup assembled from previous backups. The backups include one
previous, traditional full backup, and subsequent differential
backups and/or a cumulative incremental backup. (A traditional full
backup means a non-synthesized, full backup.) A client can then use
the synthesized backup to restore files and directories in the same
way that a client restores from a traditional backup.
--
Darren
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