For several years I have been doing my own D2D2T scheme based on
rsync/tar. I have a large capacity disk system in the office that
archives systems with rsync across a T1 to the colo cabinets. That is
where rsync really is useful, as its differential transfer is so
efficient. I am maintaining give or take 150 GB over the T1, with
seldom more than 2-3 hours of transfer time in the middle of the
night. From the disk I was then spinning things off to tape in my own
scheme.
For the unix systems I think I will continue to use the rsync method
to first stage the archive to disk, then using Bacula to maintain a
standard set of full/incremental archives of the disk snapshots.
With this system the transfer over the T1 is always a differential
transfer, but I can also maintain a hierarchical tape archive set with
Bacula.
I really like that Bacula has a windows client that can archive
ownership and ACLs. However, to archive the windows systems with
Bacula means that I must now do the full/incremental archives within
the native Bacula scheme of things, which will require that full
archives happen periodically over the T1 (or 6 mbit DSL, or whatever
relatively much-slower-than-LAN link I pull in to the office).
My question is this: will Bacula job migration allow the sort of split
use that I am doing for the unix systems? That is, will it be
possible, once a full transfer is done, to always do an incremental
archive D2D across the T1, then a hierarchical full/incremental D2T
scheme on the office LAN?
Said another way, I do not see that a job can mount a Bacula disk
archive as a client file set to then spin to tape.
Again, thanks for any insight that someone can give.
-- Michael
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