Hi, This is just to document a repeated error I was getting with rdiff-backup in the hope that it will be useful to someone, and to let you know I produced a small patch to correct it. Fix can be found attached to the bug report.
bug #42319: NFS not preserving ownership causes hardlinks to report "Update mirror temp file ... does not match" http://savannah.nongnu.org/bugs/index.php?42319 Description from the bug report ... After an OS upgrade, all changed files with multiple hard links failed to be backed up reporting "Update mirror temp file ... does not match". E.g. UpdateError bin/red Updated mirror temp file /mnt/autofs/backup/bin/rdiff-backup.tmp.1 does not match source UpdateError lib/terminfo/v/vt100-am Updated mirror temp file /mnt/autofs/backup/lib/terminfo/v/rdiff-backup.tmp.341 does not match source UpdateError lib/terminfo/v/vt220 Updated mirror temp file /mnt/autofs/backup/lib/terminfo/v/rdiff-backup.tmp.342 does not match source UpdateError sbin/dmevent_tool Updated mirror temp file /mnt/autofs/backup/sbin/rdiff-backup.tmp.345 does not match source UpdateError sbin/fsck.ext2 Updated mirror temp file /mnt/autofs/backup/sbin/rdiff-backup.tmp.346 does not match source UpdateError sbin/fsck.ext3 Updated mirror temp file /mnt/autofs/backup/sbin/rdiff-backup.tmp.347 does not match source UpdateError sbin/fsck.ext4 Updated mirror temp file /mnt/autofs/backup/sbin/rdiff-backup.tmp.348 does not match source UpdateError sbin/fsck.ext4dev Updated mirror temp file /mnt/autofs/backup/sbin/rdiff-backup.tmp.349 does not match source It is because I was backing up to an NFS share which didn't preserve uid and gids. Instead they were all mapped to nobody. # cd /backup # touch foo # chown bin:bin foo # ls -l foo -rw-r--r--. 1 nobody nobody 0 May 7 20:52 foo Chown reports succcess but, but on querying the uid and gid it always reported 99, 99 (nobody, nobody). For single linked changed files I assume that rdiff-backup gets the uid/gid from the source. However for an updated file with multiple hard links rdiff-backup creates the hard link on the destination and checks the uid/gid match the metadata. This fails resulting in the "Updated mirror temp file" error message. Fix by making rdiff-backup confirm the uid/gid actually changes when testing the backup destination before enabling the ownership changing ability. Thanks, Mike _______________________________________________ rdiff-backup-users mailing list at rdiff-backup-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/rdiff-backup-users Wiki URL: http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki
