Stuart Luscombe wrote:

>
> I’ve got the OS (CentOS) installed on the new server and have  
> installed BackupPC v3.1.0, but I’m having problems working out how  
> to sync the pool with the main backup server. I managed to rsync the  
> cpool folder without any real bother, but the pool folder is the  
> problem, if I try an rsync it eventually dies with an ‘out of  
> memory’ error (the server has 8GB), and a cp –a didn’t seem to work  
> either, as the server filled up, assumedly as it’s not copying the  
> hard links correctly?
>
> So my query here really is am I going the right way about this? If  
> not, what’s the best method to take so that say once a day the  
> duplicate server gets updated.

Check the archives for a *lot* of posts on this subject. The general  
conclusion is that copying or rsyncing big pools just doesn't work  
because of the large number of hardlinks used by BackupPC. Using rsync  
3.x instead of 2.x seems to need a lot less memory, but it just ends  
at some point. A lot of people run into this when they want to migrate  
their pool to another machine or bigger hard drive. In that case the  
usual advice is to use dd to copy the partition and then grow the  
filesystem once it's copied over.

dd'ing your complete pool every day isn't going to work either I  
guess. Instead of trying to sync the pool, can't you just run a second  
BackupPC server that also backs up your machines?

Nils Breunese.
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