On 20/01/07, Holger Parplies <[EMAIL PROTECTED]> wrote: > > I read, that backuppc stores every identical file only one time. > > Basically true, but BackupPC needs to determine that the file is identical to > something and to what. Sparing you the transfer (if possible with reasonable > cost) is rsyncs job. Doing so comes at a cost in terms of CPU usage, so > you've got the option of using tar if bandwidth is cheaper than CPU power. > In your case, it obviously is not. > > > [...] What happens with an unchanged file in a full backup? > > tar and smb will transfer it, rsync will not (presuming you mean > "unchanged" as in "same name, same content"). > > For a changed file, rsync will try to speed up the transfer. If you append a > few bytes to a large file, tar/smb will transfer the whole file (even on an > incremental), while rsync will (basically) transfer some checksums and the > few bytes only (on full and incremental backups). > So...
With tar and smb the file is transfered then it is checked to see if it is the same as a file already in the pool. If it is already in the pool a link is created and the copied file is deleted. Whereas rsync checks if the file is the same as another in the pool before transferring? Have I understood correctly? ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
