Would that be the only difference in sync operations between full and incremental backup ? I have not measured the actual bandwidth difference between a full (over a previous one) and incremental...
I will look through it. Thanks Francis -----Message d'origine----- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Les Mikesell Envoyé : 13 juin 2007 23:46 À : Thomas Nygreen Cc : [email protected]; David Rees Objet : Re: [BackupPC-users] Using Backup PC in "online backup" model Thomas Nygreen wrote: > David Rees skrev: >> On 6/13/07, Francis Lessard <[EMAIL PROTECTED]> wrote: >>> I currently use BackupPC 3.0.0 to backup 2 www servers. As bandwidth cost a >>> lot, I would like to use BackupPC similar to a commercial online backup >>> service we use. This service does a full backup only once, then do only >>> incremental backups afterward. Am I correct if I set FullPeriod to 0, start >>> a manual full backup, then let run incremental backup all the rest of the >>> time ? >> If you're using one of the rsync data transfer methods, rsync always >> transfers only data that has changed since the last backup, whether >> it's a "full" or "incremental" backup. > > I don't think that's correct. That is the default setting for rsync, but > BackupPC uses the --ignore-times option for full backups, which means > "dont skip files that match size and time". If you run the > BackupPC_dump in a shell, you'll see that it uses a long time even for > files already in the pool. By "don't skip" it means "use the rsync block comparison algorithm on the file contents". That means both ends have to read all the data which takes a long time but little bandwidth other than changed contents. -- Les Mikesell [EMAIL PROTECTED] ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ BackupPC-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/ ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ BackupPC-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
