Re: Using rsync to sync to NTFS: permission issues
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Warren Young wrote: If you don't compress the tar file, there's a nonzero chance that rsync can still save some I/O when synchronizing after the first copy. There's a quite high chance that it would transfer only the modified bytes with some margin up to the next block boundary... Maybe not optimal such as bsdiff, but at least it's on-the-fly and doesn't require 17 times the file size in RAM amount ;-) Lapo - -- L a p o L u c h i n i l a p o @ l a p o . i t w w w . l a p o . i t / -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (Cygwin) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iEYEARECAAYFAkHv6IYACgkQaJiCLMjyUvthyACfbLvMjUtgP06hxp8l9L9dZB6b czEAoJ4pYC6YfDWtED/gIqt4lZz44ExP =163c -END PGP SIGNATURE- -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Using rsync to sync to NTFS: permission issues
Hi, I (want to) use rsync under cygwin to sync files from a Linux box to a WinXP box. I want to maintain a full backup, including the file permissions. First, this is how far I got: - the XP box uses an NTFS partition to write the back-up on. - rsync runs on the XP box (as it is by far the muscle of the two and can't have a listening port open) and uses the -e ssh option. - cygwin ntea is on, ntsec is left on too. - I am administrator on the WinXP box and attached those credentials to UID 0 undercygwin. rsync is indeed able to set file credentials. - I made all accounts needed on the XP box, as XP doesn't accept use of account / group numbers that aren't tied to an account Now the problem: - rsync locks itself out sometimes: when I sync a file my way with permissions like this: rwxrwx--- user1:user1 rsync will make it just fine. But: when it wishes to update that file next time, it has no access. Likewise it makes folders with such permissions and then can't access them to write the files into them. - rsync handles this rather badly btw: it goes to 100% CPU use and stays there forever and ever, not getting any further - this non-access is consistent with NTFS file permissions: even an administrator can't normally browse through folders to which he has no access, but: he should be able to make backups of them / place those back, which is what we are doing here. - WinXP info tell me that to get this special access the application must use the NTFS back-ups API. Apperently cygwin+rsync does not.. how can I change that? Thanks for any help you can provide! -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Using rsync to sync to NTFS: permission issues
Wim Heemskerk Lists wrote: I (want to) use rsync under cygwin to sync files from a Linux box to a WinXP box. I want to maintain a full backup, including the file permissions. Without something like NIS or LDAP to synchronize the user and group databases between the machines, I think you will have problems with that goal. - rsync locks itself out sometimes: when I sync a file my way with permissions like this: rwxrwx--- user1:user1 rsync will make it just fine. But: when it wishes to update that file next time, it has no access. Are you running rsync as the SYSTEM user? - rsync handles this rather badly btw: it goes to 100% CPU use and stays there forever and ever, not getting any further I've seen this before, but only on a Win98 box, where it would freeze the machine, hard. I have no more information on the problem beyond that, and won't be able to investigate it because that box has since been replaced by a WinXP box. - WinXP info tell me that to get this special access the application must use the NTFS back-ups API. Apperently cygwin+rsync does not.. how can I change that? Such an effort would be best done with a native port of rsync, I'd think. Adding Win32-specific calls to Cygwin rsync would be missing the whole point of Cygwin, I think. Bottom line, I think if I had a hard requirement to back up files with permissions from a Linux box to a Win32 box, I'd just tar them up and send the tar file to the PC. If you don't compress the tar file, there's a nonzero chance that rsync can still save some I/O when synchronizing after the first copy. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
