On Fri, Mar 1, 2013 at 3:32 PM, <backuppc AT kosowsky DOT org> wrote:
> gregrwm wrote at about 04:24:10 -0600 on Friday, March 1, 2013:
> > i'm using a simple procedure i cooked up to maintain a "third copy" at a
> > third physical location using as little bandwidth as possible. it simply
> > looks at each pc/*/backups, selects the most recent full and most recent
> > incremental (plus any partial or /new), and copies them across the wire,
> > together with the most recently copied full&incremental set (plus any
> > incompletely copied sets), using rsync, with it's hardlink copying
> > feature. thus my third location has a copy of the most recent (already
> > compressed) pc/ tree data, using rsync to avoid copying stuff over the wire
> > that's already there (and not bothering with the cpool), which, for me, is
> > a happily sized set of hardlinks that rsync can actually manage (ymmv). i
> > have successfully used this together with a script to recreate the cpool
> > if/when necessary. if it's of interest i could share it.
>
> One caution: If one is managing multiple pc's with redundant files across them
> (e.g., OS, apps), then you will waste a lot of bandwidth (and time)
> copying them since you will lose the pooling. Alternatively, if you
> use rsync with the -H flag, then you are back to the problem of rsync
> choking on hardlinks.
But, you'd spit the difference of these problems if you 'rsync -H' a
single pc tree or just the recent runs at a time. Then the inode
table to track the links would be smaller and less likely to cause
trouble - and most of the hard links are to previous runs of the same
file anyway. And even backuppc itself won't identify the duplicates
before the transfer in each new location.
--
Les Mikesell
lesmikesell AT gmail DOT com
------------------------------------------------------------------------------
Everyone hates slow websites. So do we.
Make your web apps faster with AppDynamics
Download AppDynamics Lite for free today:
http://p.sf.net/sfu/appdyn_d2d_feb
_______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki: http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/
|
