Hi John, On Wed, Feb 18, 2009 at 01:24:16PM -0600, John Goerzen wrote:
> >> So, given that, I don't really understand why there is a distinction > >> between a full and an incremental backup. Shouldn't either one take > >> up the same amount of space? That is, if you've got few changes on > >> the client, then on the server you're mostly just hardlinking things > >> anyway, right? So why is there a choice? > > > > With the tar and smb backup methods, full runs transfer everything from > > the remote, incrementals transfer only files with timestamps newer than > > the last full. 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? No, there is still info missing: The incremental has "holes" - unchanged files are not linked into the directory tree, so you'll lose files. Just don't bother about the fulls - have BackupPC take them once in a while. Bye, Tino. -- "What we nourish flourishes." - "Was wir nähren erblüht." www.lichtkreis-chemnitz.de www.craniosacralzentrum.de ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
