----- "Les Mikesell" <[email protected]> wrote: > On 5/27/2010 3:54 PM, Peter Doherty wrote: > > > >> > >> But how can I estimate how long rsync needs to determine which > files > >> to > >> transfer? I'd like to do the whole backup process at night, and I > feel > >> that this could be impossible. > >> > >> Thanks! > > > > > > The biggest factor is how many files this is, which I don't see in > > your message. if it's 1 5GB file, then it might take seconds to > > calculate the changes. > > if it's 5 million files, then it's going to take a lot longer, > perhaps > > hours. > > Basically it is going to transfer the entire directory listing then > walk > through it. On incremental runs it will skip anything where the > length > and timestamp match the copy in your previous full. On fulls it will > > read all data and do a block checkum comparison. This doesn't take a > lot > of bandwidth but it may take too much time for you - but perhaps you > can > schedule the fulls to hit weekends if the target is less busy then. > > Also, if the data is compressible, it may help if you add the -C > option > the the ssh command. > > -- > Les Mikesell > [email protected] >
I have some Windows boxes I converted from smb to rsync. When I did the switch, I forced a full backup. On one system, the backup went from 182 minutes to 108 minutes, on another system, is went from 22 minutes to 8 minutes, on a third box, it went from 886 minutes to who knows what. Almost 20 hours later and it's still running. Go figure. Gerald ------------------------------------------------------------------------------ _______________________________________________ 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/
