Brendan Simon wrote:
What do you mean by backup window?
By this I mean how fast do you need the backup done (you answered this
below). You can set BackupPC to blackout certain times and thus "kind
of" set a time for when you want the backup run. I do this to force
backups to run between 3 and 6 am for example.
Which configuration setting do mean?
I want to do a full backup within 4 hours if possible, though I am happy
for the first full backup to take longer if necessary.
I would have thought that subsequent "full" backups would still use
rsync, but the results saved as full files rather than deltas or only
changed files.
If my understanding of the backuppc architecture is correct, then I
don't see the point of doing "full" backups in the sense of transferring
all the files accross the network. I don't see the point of squeezing
all these files through the network if rsync can be trusted to give the
same results. Sure, the server end could just keep multiple copies for
multiple "full" backups or use hardlinks/softlinks.
rsync is definitely better than tar (just doesn't work for HFS forks on
Mac OSX10.3 and before). I use rsync for my linux machines and it works
great.
Is there a way to setup backuppc to always use rsync to send file
deltas, and to limit the transfer between a start and end time of day
(eg. 12am to 4am) ?? I believe the answer is yes. Maybe that's what
you mean by backup window ;-)
see above
If the backup does not complete, then the next backup period will get
further along, until eventually the entire backup is complete. From
then on, only rsync deltas need ever be transferred and "full" backups
can be maintained on the server side in an appropriate manner. rsync
and/or md5 and/or sha1 can be used to check file integrity, etc.
not quite true. Once BackupPC starts a backup it doesn't stop until it
is completed. And if it misses the start of the period for some reason
(network error), it will start it later in the period (e.g. at 4am
instead of 3am). The periods are not really a *window* but instead are
a time when BackupPC is allowed to backup that particular client.
I checked my linux backups and I am easily getting 10GB in 50 - 56
minutes over a fast internet link (not a LAN) so you should be able to
get 40GB in 4 hours. If you have having problems it might be memory
related like Les suggested (make sure you have 1 - 2GB on the servers as
rsync eats up ram).
cheers,
ski
--
"When we try to pick out anything by itself, we find it
connected to the entire universe" John Muir
Chris "Ski" Kacoroski, [EMAIL PROTECTED], 206-501-9803
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