- - A new incremental-recursion algorithm is now used when rsync is talking
- to another 3.0.0 version. This starts the transfer going more quickly
- (before all the files have been found), and requires much less memory.
- See the --recursive option in the manpage for some restrictions.
-
- - The default --delete algorithm is now --delete-during when talking to a
- 3.x rsync. This is a faster scan than using --delete-before (which is
- the default when talking to older rsync versions), and is compatible
- with the new incremental recursion mode.
-
- - Added the --delete-delay option, which is a more efficient way to
- delete files at the end of the transfer without needing a separate
- delete pass.
-
- - Added the --acls (-A) option to preserve Access Control Lists. This is
- an improved version of the prior patch that was available. (If you need
- to have backward compatibility with old, patched versions, the new
- acls.diff patch that will add that.)
-
- - Added the --xattrs (-X) option to preserver extended attributes. This is
- an improved version of the prior patch that was available. (If you need
- to have backward compatibility with old, patched versions, the new
- xattrs.diff patch that will add that.)
-
- - You may specify --max-delete=0 to a 3.0.0 client as long as the
- receiving side is at least version 3.0.0. This means that you
- can pull from an older rsync with this option, but pushing to an
- older rsync will generate an error. *Be sure to never specify a 0
- value to an older rsync client, or it will be silently ignored.*
-
- - The --hard-link option now uses less memory on both the sending and
- receiving side for all protocol versions. For protocol 30, the use
- of a hashtable on the sending side allows us to more efficiently
- convey to the receiver what files are linked together. This reduces
- the amount of data sent over the socket by a considerable margin
- (rather than adding more data), and limits the in-memory storage of
- the device+inode information to just the sending side for the new
- protocol 30, or to the receiving side when speaking an older protocol
- (note that older rsync versions kept the device+inode information on
- both sides).