Les Mikesell wrote: > Evren Yurtesen wrote: > >>> 1.) Rsync checksums are not a feature of BackupPC. They are a feature >>> of the >>> rsync protocol. >> >> >> BackupPC compares files in the pool using the checksum to find if the >> exact same file is in the pool or not. This is not a feature of rsync. > > > I think you are confusing 2 different things here. When backuppc > transfers in a new file, it computes a hash of some portion of the file > to use as the pool filename and a quick check to see if there is already > a match in the pool. However, this is not done during the rsync > comparison. Rsync just follows the links in the per-pc backup directory > of the last full. Any name not matched from there is transferred in > full, then matched or added to the pool with the filename hashing step.
You are right, I was confusing them. > I just thought of one other thing that might make your transfers appear > to be very slow. Do you happen to have any very large sparse files (dbm > type) on the target machines? For example, a 64-bit linux machine that > uses -1 as the nfsnobody uid will have a 1.2TB /var/log/lastlog > containing only a few blocks of data. While backuppc will compress this > to something small in the archive, rsync and tar don't handle the > transfer very well and it is a good idea to exclude it. I dont have very large files, perhaps largest is 200mb or so. But very few and they dont change often. Anyhow, thanks for all the help and patience. I learned a lot in the process. Thanks, Evren ------------------------------------------------------------------------- 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/
