http://backuppc.wiki.sourceforge.net/How+to+delete+backups

Ryan Manikowski

System Administrator
2ergo Americas Inc.
 
:703.677.8499:
www.2ergo.com
Arlington, VA

 
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Thomas Birnthaler wrote:
> Hello,
>
> we are using BackupPC and it works perfect on different places.
> But we have 2 questions on it:
>
> 1. We wonder why neither the GUI nor the commands offer a possibility to 
> delete backups (full and incremental). If e.g. the backup partition is filled 
> up, this would be very helpful.
>
> As far as we understood the concept of using hardlinks and different 
> directories for each backup + a hash pool for each file it seems to be very 
> easy to delete a backup NN.
>
> Just delete recursively the backup directory NN and the nightly run will 
> really destroy all orphaned files with a hardlink count of 1.
>
> If a full backup is deleted that way, incremental backups depending on it 
> then 
> depend on the next earlyer full backup and work as before. Same is true for 
> incremental backups. So the GUI works as before and the creation of new 
> backups too.
>
> Is that idea correct?
>
> 2. What is real benefit of incremental backups compared to full backups?
>
> In both cases only changed/new files use disk space according to the hardlink 
> concept of BackupPC.
>
> We have also detected, that in some cases incremental backups need much more 
> time than full backups (factor 3-5) This sounds odd to us.
>
> Thanx
> Thomas Birnthaler
>   

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