Harry Putnam schreef:
Alan Brown <[EMAIL PROTECTED]> writes:
I'm noticing a lengthy pause in an rsnapshot setup when the
directories being shuffled are over 3gb or so. Rsnapshot makes a copy
of the last backup to a new name then runs rsync against the original.
Making that copy can take awhile. And more so as it gets bigger.
Yikes! Double your disk space, just like that.
Putting that in perspective, I'm backing up 1TB filesystems and have
20 of them. It gets "real expensive, real fast".
This is so far beyond anything I deal with its not really
comprehensible to me.
For filesystems of that size, Taking the approach of restoring a
snapshot form tape and then running rsnapshot would take at _least_ a
day.
Double yikes...
But back to the point of my post. I believe there are many people
here and elsewhere using bacula for disk based bkup. As you know that
kind of usage is designed into bacula, although it is apparent it is
first a tape based backup system.
So given that my usage will be only disk based but will be run across
a home network, will I see an improvement in speed backing up 4-6GB at
a time?
I have messed around and messed up enough with bacula to know that it
is far more complicated to run than rsnapshot but am assuming that
will eventually settle down to a routine I can manage. I am rather
thick skulled compared to most but even at that... I'm confident I'd
catch on enough to get a working routine going eventually.
So If I did, would I see a significant change in time and cpu consumed
for the same scale of operation?
I think it depends largely on how often those files change. If they
hardly change, then your incrementals will be small and they will be
done very quickly. On the other hand, with Bacula it's important to also
make a full backup regularly, say at least once a month.
The best is to start small (with the example), then include all the
files you need and then tweak it until it does what you want. Keep your
rsync running for the first few months while your getting used to the
way Bacula works. It's not rocket science, but it will involve ploughing
through almost all the material in the manual two, maybe three times.
One read of the manual took me 2,5 days. The second reading went a bit
faster, maybe 2 days, but then trying with the examples took a bit more
time.
Jo
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