Corinna Vinschen schrieb: > On Sep 23 13:34, Andreas Heinlein wrote: > >> Hello, >> >> no, I do *not* want to transfer ADS with rsync, that would be an FAQ ;-) >> >> But I have setup rsyncd on a windows host using cygwin. This machine >> hosts files with ADS which are created by Antivirus software and change >> frequently. I do not need to save these ADS, but somehow they seem to >> lead rsync to believe the file has changed and transfer it again. Since >> we are doing multi-generation backups with rsync and hard links (using >> the --link-dest option), this greatly increases space requirements. I >> compared old and new files, and they are exactly identical in size, >> name, path, permissions (as UNIX/cygwin sees them), they have the same >> md5sum. >> >> I have not yet tried running rsync with the checksum option, but since >> we are backing up > 200.000 files, that would likely take much too long. >> Do you have any ideas how to change this behaviour? >> > > Look for the rsync --size-only option. Probably the Antivirus stuff > changes the modification date, which is usually used by rsync for a > quick decision what has changed. > > Alternatively use another Antivirus software which does not modify the > files on disk. > > > Corinna Hello,
thanks for your reply. It turned out I had not checked closely enough. I found out it has nothing to do with ADS, but with file ownership. Some of the files in question have UID and GID 4294967295 (aka 2^32-1), though they are owned by a valid Domain User. Rsync on the UNIX side sets the UID to 0 for these files, I overlooked this. I can work around this now by not preserving owner and group, which is not necessary in this case. But I still wonder where this comes from. Bye, Andreas -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
