--backup-dir make backups into this directory
--suffix=SUFFIX backup suffix (default ~ w/o --backup-dir)
-u, --update update only (don't overwrite newer files)
+ --inplace update the destination file inplace
-K, --keep-dirlinks treat symlinked dir on receiver as dir
-l, --links copy symlinks as symlinks
-L, --copy-links copy the referent of all symlinks
pointing to a directory, it will be treated as matching a directory
from the sender.
+dit(bf(--inplace)) This causes rsync not to create a new copy of the file
+and then move it into place. Instead rsync will overwrite the existing
+file, meaning that the rsync algorithm can't extract the full ammount of
+network reduction it might otherwise.
+
+This option is useful for transfer of large files with block based changes
+and also on systems that are disk bound not network bound.
+
+WARNING: If the transfer is interrupted, you will have an inconsistent file
+and the transfer should be run again.
+
dit(bf(-l, --links)) When symlinks are encountered, recreate the
symlink on the destination.
dit(bf(-W, --whole-file)) With this option the incremental rsync algorithm
is not used and the whole file is sent as-is instead. The transfer may be
faster if this option is used when the bandwidth between the source and
-target machines is higher than the bandwidth to disk (especially when the
+destination machines is higher than the bandwidth to disk (especially when the
"disk" is actually a networked filesystem). This is the default when both
-the source and target are on the local machine.
+the source and destination are specified as local paths.
dit(bf(--no-whole-file)) Turn off --whole-file, for use when it is the
default.