I daily rsync my Mac''s home directory to home solaris server box, and
snapshot it. Weekly, I rsync my photo directory to my $10/month hosting
provider. To better manage situations where I have a long rsync in progress
up to hosting provider, and the daily backup kicks in, I wrote a simple
script that ensures that data is properly synchronized. It works just like
rsync, but adds a parameter to select a filesystem/snapshot. So, instead of
specifying, say, /export/backup/joe/photos as rsync source, you would
specify tank/backup/joe@ /photos, meaning, find the latest snapshot and
mountpoint for tank/backup/joe, and use photos directory from that as rsync
source.
The script can be told to use current version of the files
("filesystem")
(it will create a temporary snapshot to rsync from), the latest existing
snapshot ("filesystem@") or a specific snapshot ("filesystem at
snapshot"). It
requires ability to "pfexec zfs" if it needs to create temporary
snapshot -
once the new thing with zfs permissions is implemented, pfexec can be
removed.
The script is available at http://blog.cognistudio.com/
Hope someone can use it.
Marko
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