VF and pools

Hey, all.  I'm in the middle of designing the next generation of our 
backup system, which will likely be based on Bacula 15.  This time, 
we'll be using both disk and tape, vs the disk-only we've run before, 
which brings up a question or two that I haven't encountered before.

When running VirtualFull jobs, does the source material (previous Full, 
latest Differential, subsequent Incrementals), need to all reside in the 
same Pool?  In multiple pools but available to the same SD?

For this system, we're planning on 2 SD hosts, with local disks, and a 
tape library attached to one of them.  We thought that we could keep the 
Fulls/VFs entirely on tape, only store the incrementals on disk, and 
write new VFs directly to tape.  As a result, we trimmed down the size 
of our disk pool for cost reasons (HDDs and SSD are both crazy expensive 
right now).  I don't think I'll have enough space in the disk pool to 
store Incrementals *and* a previous Full/VF.  If that's true, I need to 
re-think my design a bit.  It may mean we just do true Fulls to tape, 
and Incrementals on disk, and not get to use VFs at all.

Thanks,

Lloyd

-- 
Lloyd Brown
HPC Systems Administrator
Office of Research Computing
Brigham Young University
http://rc.byu.edu



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