- - Added the --append option that makes rsync append data onto files
- that are longer on the source than the destination (this includes new
- files).
-
- - Added the --min-size=SIZE option.
-
- - Enhanced the parsing of the SIZE value for --min-size and --max-size.
-
- - If lutimes() and/or lchmod() are around, use them to allow the
- preservation of attributes on symlinks.
-
- - Added two config items to the rsyncd.conf parsing: "pre-xfer exec"
- and "post-xfer exec". These allow a command to be specified on a
- per-module basis that will be run before and/or after a daemon-mode
- transfer.
+ - 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.
+
+ - 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, and
+ moves the in-memory storage of the device+inode information from the
+ receiving side (for protocols < 30) to the sending side (note that
+ older rsync versions kept the device+inode information on both
+ sides).