> Now what I'm thinking of is streaming multiple concurrent jobs to a single
drive
I do that. On my lan, I need to backup config files and mysql, etc on a few
centos and ubuntu servers. And also my win7pro computer which has large
ssds, and which takes hours to backup to an LTO4 drive on my 1G network.
Trying to schedule all that is a nightmare, so I just do it all at once. The
servers are only a few gigs each, and without spooling they are interleaved
with the Windows backup. But that's fine because they are located at the
beginning of the tape, and so searching for server files doesn't take very
long.
Without spooling, the tape drive runs continuously with only
occasional/brief stops or changes in speed. With spooling, the drive sits
idle until the cache fills, then runs until the cache is empty, then waits
again. It's a 2.5 hour backup without, and it's a 4+ hour backup with
spooling, if I recall. At least that's how it works for me.
Feature request might be a threaded cache? Not sure if that's a correct way
to describe it... deleting files as are they are recorded and fetching new
files to fill in the background.
Anyway, I think it works great as is, without spooling. Best to test for
yourself.
Good luck.
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