Re: [rdiff-backup-users] compare: ignore ctime

[Carsten Lorenz]

Ben Escoto wrote: "Carsten Lorenz" <[EMAIL PROTECTED]> wrote the following on Thu, 17 Nov 2005 11:24:03 +0100 We are now using rdiff-backup on our debian fileserver without any real problems. Our daily backup of ca. 1.2TB starts at 1:00am and lasts for 43 hours. As 43 hours are more than a day, this is our problem. rdiff-backup detects half of the files (395041 files with 567GB) as changed, but rdiff-backups "Increment FileSize" is only 5GB. The only thing that has changed on most of this files is their ctime. So rdiff-backup works fine and correct. Actually rdiff-backup already ignores ctime, so that isn't your problem :-) (The reason it does this is simply because a lot of the existing automatic tests depend on a successful rdiff-backup mirror comparing correctly to the source. This is impossible if ctimes are compared, since rdiff-backup can't set ctimes either.) So anyway, the problem isn't ctimes. How can you figure out why rdiff-backup thinks a file has changed? One way is to find a file you think hasn't changed, and compare its records in two consecutive mirror_metadata files. (Note that there is no ctime information in the mirror_metadata file.) I've got a file which hasn't changed, even the data in the mirror_metadata hasn't changed, but the file_statistic shows that it has changed. The file doesn't appear in rdiff-backup its extended_attributes or access_control_lists files. Since this file has an acl this may be the reason why rdiff-backup detects a difference. I switched of acls and eas to look if this works. Regards, Carsten file_statistic: .../get the look_02.eps 1 15771551 15771551 219 both mirror_metadata files:   Permissions 436 stat: Access: (0664/-rw-rw-r--)  Uid: ( 1032/   mmohr)   Gid: (17000/  beaute) getfacl: # owner: mmohr # group: beaute user::rw- group::rwx                      #effective:rw- group:readonly:r-x              #effective:r-- mask::rw- other::r--

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