Re: [BackupPC-users] Freeing up disk space (maybe with IncrFill)
2010-10-19 13:53:51
Jason A. Spiro wrote:
> Hi all,
>
> To all developers and other contributors on this list: Thank you for
> contributing to BackupPC.
>
> My client's BackupPC server's 1TB backup-storage RAID array is almost
> out of space (96% full). He's running BackupPC 3.1.0 on Ubuntu. The
> server backs up perhaps a few dozen hosts. It's set to keep at least
> one full backup and at least sixty incremental backups per host.
>
> 1. I guessed that IncrFill was a good way to save space: this way
> only one full would be stored per machine. Was I right? Is IncrFill
> the best way to save space?
>
> 2. I enabled this a few hours ago and manually ran BackupPC_nightly
> but the server hasn't filled any incrementals. Is there a reasonably
> easy way to force it to fill the incrementals? (Otherwise I may just
> set it not to keep any incrementals: I figure that should make
> BackupPC discard all of them, perhaps right after I reload the config
> file.)
>
> Thanks in advance,
> Jason Spiro
>
You will find some hints within the documentation:
- BackupPC's CGI interface automatically fills incremental backups
- The default for $Conf{IncrFill} is off, since there is no need to fill
incremental backups.
Every time you save a backup you need the space for new files. BackupPC will
save space by storing identical files only once.
But if you fill a backup you will only create hardlinks within the backup to
unchanged files within prior backups.
br
Matthias
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