yes you could write a bash script and put it as a job in your crontab
to run every 15 minutes, say...
My mirror backup server (not my primary) is updated from my primary by
a script which uses rdiff. The script runs on the primary and starts
by waking up the mirror server (over the internet), then runs rsync,
then after checking all is well, powers down the mirror.
Hmm I just have a small NAS server (qnap 109), no 'mirror backup
server' here.
What do you mean by 'waking up the mirror server'?
~D Wiki
Well our main backup is done by all our machines to a server on our LAN
using rdiff-backup - this I call the 'primary' backup server. Then each
night this primary machine runs a script which uses rsync to copy its
contents to an offsite machine, which therefore is maintained as a
'mirror' of the primary.
The mirror machine is normally switched off. To switch it on, the script
sends a 'magic packet' to the mirror machine, thus turning it on. Then
the script runs rsync, and when that is over, it shuts the mirror
machine down again.
In a simple case, you can use the wakonlan utility to wake the remote
machine: see http://gsd.di.uminho.pt/jpo/software/wakeonlan/. If it
isn't already available on your machine and you use Debian or Ubuntu you
can add it with apt-get I think. If the remote machine is behind another
router then waking it may be more complicated: I have a special script
to pass through Netgear DG834G router, for example (see
http://www.timedicer.co.uk/dg834g.)
Dominic
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