[CentOS] [OT] Building a new backup server

Tue Nov 5 22:31:49 UTC 2013
Les Mikesell <lesmikesell at gmail.com>

On Tue, Nov 5, 2013 at 4:25 PM,  <m.roth at 5-cent.us> wrote:
>>> Yeah, I know, we're trying to move stuff around, that's not infrequent,
>>> given the amount of data my folks generate.
>> And that's the other place that backuppc will help.  If you move a
>> file that is already in an existing backup, backuppc's rsync will copy
>> it over the network because it doesn't have a match in that location,
>> but when it goes to add the compressed copy to the pool it will notice
>> that there is already a file with identical content there and use a
>> hardlink instead of needing additional space.
> Um, but rsync will already do that.

No, rsync itself will only do it when the identical file is still in
the identical path from the identical host.

> Anyway, when I mean move things, I
> meant whole backups to a less-full drive, or the much rarer times that we
> need to move a user who's using a *large* amount of space.

Backuppc will match up identical content, no matter where it finds it.
 If it is a different copy or moved to a different location it does
have to transfer it to the backuppc server, but then it will be
discarded and replaced with a link to the existing pooled copy.

  Les Mikesell
     lesmikesell at gmail.com