Now that I have my tape autochanger and such working as desired, though it may
take a little tweaking, I am overall pretty stoked about getting this working.
Now to start getting into the gritty details of tweaking for my environment and
limited capacities.
My first question is in regard to the monthly fulls. I have an issue with tape
population in my library. I have only 20 slots for LTO-2 tapes, and my first
full backup of my primary server has already used six of those. The data
doesn't compress very well. Is there a way to inform Bacula to overwrite only
that system's previous full when it goes to do a new one? We have TSM at my
place of employment, and it does the whole "one time full, incremental forever"
thing, which would reduce dramatically the number of tapes required. However,
I am pretty limited on my available resources as far as tapes are concerned,
and so I don't have the ability to maintain a stack of 60 unused tapes waiting
to check out full ones and refill with empties. Two months will fill all my
available tapes. I am basically needing to do a poor man's "de-dupe", really,
so that there is only one copy of a server's data in the library at any given
time, even three, four or five
years from now. Is that possible?
Also, I am using spooling to maximize performance on the drives. I have the
max bytes set to about 90% of my spool disks' capacity. However, I didn't see
anywhere if there was a low bytes setting, so that if the pool fills, it will
spool off to tape all the way down to the minimum instead of just until the
spool says "I'm not at my max capacity anymore." Or does it do that and I am
just not setting the max size right and have it a decimal place too small?
Any help is appreciated. And this Bacula thing is really a god-send.
Thanks!
Chris
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