A very minor optimization was made to read_sbuf(), read_byte(),

[rsync/rsync.git] / rsync.yo

diff --git a/rsync.yo b/rsync.yo
index ec1b2dd..43ca31b 100644 (file)
--- a/rsync.yo
+++ b/rsync.yo
@@ -289,6 +289,7 @@ verb(
      --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
@@ -484,6 +485,20 @@ dit(bf(-K, --keep-dirlinks)) On the receiving side, if a symlink is
 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: The file's data will be in an inconsistent state during the
+transfer (and possibly afterwards if the transfer gets interrupted), so you
+should not use this option to update files that are in use.  Also note that
+rsync will not update a file inplace that is not writable by the receiving
+user.
+
 dit(bf(-l, --links)) When symlinks are encountered, recreate the
 symlink on the destination.
 
@@ -512,9 +527,9 @@ This option can be quite slow, so only use it if you need it.
 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.
@@ -903,7 +918,7 @@ section for details.
 
 dit(bf(--read-batch=FILE)) Apply all of the changes stored in FILE, a
 file previously generated by --write-batch.
-If em(FILE) is "-" the list will be read from standard input.
+If em(FILE) is "-" the batch data will be read from standard input.
 See the "BATCH MODE" section for details.
 
 dit(bf(-4, --ipv4) or bf(-6, --ipv6)) Tells rsync to prefer IPv4/IPv6