Rsync - detects changes on chmod and chown

Question

I have some backup processes using rsnaphson, himself using rsync. Some big data files have changed the owner / permissions and are detected as file changes by rsync.

I would like to disable this feature, so for example a file that changed the permissions from 755 to 775 is not recognized as changed by rsync and stays as is in the destination dir.

My rsync call has this options at the moment:

-a --delete --numeric-ids --relative --delete-excluded --compress-level=5 --stats

Answer 1

Your problem is:

-a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)

You are explicitly telling rsync to check the permissions. e.g.:

-p, --perms                 preserve permissions

Get rid of -a and tailor your options as needed.