- - Rsync now supports popt's option aliases, which means that you can
- use /etc/popt and/or ~/.popt to create your own option aliases.
-
- - Added the --delete-during (--del) option which will delete files
- from on the receiving side incrementally as each directory in the
- transfer is being processed (which makes it more efficient than the
- default, before-the-transfer behavior of --delete). Note that the
- --del option is implemented as an internally-defined popt alias, so
- an rsync daemon that refuses "delete" (which, for safety's sake,
- really matches "delete*") will still refuse all delete options. The
- default --delete behavior is also explicitly selectable via
- --delete-before.
-
- - All the --delete-WHEN options are now more memory efficient:
- Previously an entire duplicate set of file-list objects was created
- on the receiving side for the entire destination hierarchy. The new
- algorithm only creates a single directory of objects at a time.
-
- - Added the --copy-dest option, which works like --link-dest except
- that it includes copies of identical files.
-
- - Added support for specifying multiple --compare-dest, --copy-dest, or
- --link-dest options, but only of a single type. (Promoted from the
- patches dir and enhanced.)
-
- - Added the --max-size option. (Promoted from the patches dir.)
-
- - The daemon-mode options were separated from the normal rsync options
- so that they can't be mixed together. This makes it impossible to
- start a daemon that had improper default option values that could
- cause problems (such as a hang or an abort) when a client connects.
-
- - The --bwlimit option may now be used in combination with --daemon
- to specify both a default value for the daemon side and a value
- that cannot be exceeded by a user-specified --bwlimit option.
-
- - Added the "port" parameter to the rsyncd.conf file. (Promoted from
- the patches dir.) Also added "address".
-
- - In _exit_cleanup(): when we are exiting with a partially-received
- file, we now flush any data in the write-cache before closing the
- partial file.
-
- - The --inplace support was enhanced to work with --compare-dest,
- --link-dest, and (the new) --copy-dest options.
-
- - Added the --dirs (-d) option for an easier way to copy directories
- without recursion.
-
- - Added the --list-only option which is mainly a way for the client to
- put the server into listing mode without needing to resort to any
- option kluges (e.g. the age-old use of "-r --exclude="/*/*" for a
- non-recursive listing). This option is used automatically when a
- modern rsync speaks to a modern daemon, but may also be specified
- manually if you want to force the use of the --list-only option over
- a remote-shell connection.
-
- - Added the --omit-dir-times (-O) option which will avoid updating the
- modified time for directories when --times was specified. This
- option will avoid an extra pass through the file-list at the end of
- the transfer (to tweak all the directory times), which can result in
- an appreciable speedup for a really large transfer.
-
- - Added the --filter (-f) option and its helper option, -F. Filter
- rules are an extension to the existing include/exclude handling
- that also supports nested filter files as well as per-directory
- filter files (like .cvsignore, but with full filter-rule parsing).
- This new option was chosen in order to ensure that all existing
- include/exclude processing remained 100% compatible with older
- versions.
-
- - Added the --delay-updates option that puts all updated files into
- a temporary directory (by default ".~tmp~", but settable via the
- --partial-dir=DIR option) until the end of the transfer. This
- makes the updates a little more atomic for a large transfer.
-
- - If rsync is put into the background, any output from --progress is
- reduced.
-
- - Documented the "max verbosity" setting for rsyncd.conf. (This
- setting was added a couple releases ago, but left undocumented.)
-
- SUPPORT FILES:
-
- - Added support/atomic-rsync -- a perl script that will transfer some
- files using rsync, and then move the updated files into place all at
- once at the end of the transfer. Only works when pulling, and uses
- --link-dest and a parallel hierarchy of files to effect its update.
-
- - Added support/mnt-excl that takes the /proc/mounts file and
- translates it into a set of excludes that will exclude all mount
- points (even mapped mounts to the same disk). The excludes are made
- relative to the specified source dir and properly anchored.
-
- - Added support/savetransfer.c -- a C program that can make a copy of
- all the data that flows over the wire. This lets you test for data
- corruption (by saving the data on both the sending side and the
- receiving side) or provides a way to help debug a protocol error.
-
- - Added support/rrsync -- my version of Joe Smith's restricted rsync
- perl script. This helps to ensure that only certain rsync commands
- can be run by an ssh invocation.
-
- - Improved the option descriptions in the --help text.
+ - 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).