On 21/01 10:48:50, Tino Schwarze wrote: > On Wed, Jan 21, 2009 at 02:08:31PM +0900, Peter Wright wrote: > > > An incremental backup will transfer changed data from the > > > previous full or incremental of a lower level. > > > > Can backuppc be configured to transfer changed data from the previous > > incremental of the *same* level, or would this require a patch? > > Why would you want to do that? The previous incremental of the same > level is a lot older and you'd need to transfer a lot more changes.
Take my words in the context of responding to Adam - though perhaps I could have put it more clearly :). Adam stated that "An incremental backup will transfer changed data from the previous full or incremental of a lower level." What I was thinking is that if my highest priority was minimising bandwidth per backup, why shouldn't I be able to configure backuppc to *only* do incrementals and consider them all to be the same "level"? But I suspect I've probably misunderstood one or more key backuppc principles, especially re: what the "levels" really mean. > In default configuration (IIRC), your backups with weekly full would > look like this: [ snip description ] > The second level-1 incremental will transfer all changes since the > full backup. Thanks for the clarification - that was how I thought it worked, but it's good to make sure. My key issue is that if I'm interested in bandwidth minimisation above all else, why would I want to do anything other than incremental-since-the-most-recent-previous-incremental, regardless of the "level" concept? As I understand Holger's earlier response, the major (only?) downside is the cost of building the backup view - and I can certainly see how that'd become significant after a while. I suspect I've got my brain too hooked into the rsnapshot model (http://www.rsnapshot.org/) and I'm not quite understanding the different philosophy of backuppc. > Tino. Pete. -- "But now I've taken my leave of that whole sick, navel-gazing mess we called the software industry. Now I'm in a more honest line of work: now I sell beer." -- jwz ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
