Re: [BackupPC-users] How does BackupPC work?
2009-02-18 18:56:03
John Goerzen wrote:
>> With rsync, a full does a block checksum compare of all
>> files, incrementals only files where the timestamp or length differ. On
>> the server side, fulls rebuild a complete tree of links, incrementals
>> only have the differing files.
>
> So, if I use the rsync method, is there any reason to ever run a full
> backup after the very first one? It seems like all the info needed
> would be preserved, even if that very first full backup gets deleted
> eventually, right?
Rsync does its comparison against the previous full, so the incremental
runs transfer more and more as changes accumulate. Also, you can't
delete a full when you have incrementals that depend on it. The best
strategy is to just skew the days when the fulls run (by manually
forcing one at an appropriate time).
--
Les Mikesell
lesmikesell AT gmail DOT com
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