it() The file's data will be in an inconsistent state during the transfer
and will be left that way if the transfer is interrupted or if an update
fails.
- it() A file that does not have write permissions cannot be updated.
+ it() A file that rsync cannot write to cannot be updated. While a super user
+ can update any file, a normal user needs to be granted write permission for
+ the open of the file for writing to be successful.
it() The efficiency of rsync's delta-transfer algorithm may be reduced if
some data in the destination file is overwritten before it can be copied to
a position later in the file. This does not apply if you use bf(--backup),
This option is useful for transferring large files with block-based changes
or appended data, and also on systems that are disk bound, not network
-bound.
+bound. It can also help keep a copy-on-write filesystem snapshot from
+diverging the entire contents of a file that only has minor changes.
The option implies bf(--partial) (since an interrupted transfer does not delete
the file), but conflicts with bf(--partial-dir) and bf(--delay-updates).
destination may end up with extra hard links include the following:
quote(itemization(
- it() If the destination already contains hard links, rsync will not break
- them explicitly. However, if one or more of the paths have content
- differences, the normal file-update process will break those links, unless
- you are using the bf(--inplace) option.
+ it() If the destination contains extraneous hard-linked files, rsync will not
+ break them explicitly. However, if one or more of the paths have content
+ differences, the normal file-update process will break those extra links
+ (unless you are using the bf(--inplace) option).
it() If you specify a bf(--link-dest) directory that contains hard links,
- rsync may use the same bf(--link-dest) file multiple times via several of
- its paths.
+ the linking of the destination files against the bf(--link-dest) files can
+ cause some paths in the destination to become linked together due to the
+ bf(--link-dest) associations.
))
Note that rsync can only detect hard links between files that are inside
If incremental recursion is active (see bf(--recursive)), rsync may transfer
a missing hard-linked file before it finds that another link for that contents
exists elsewhere in the hierarchy. This does not affect the accuracy of
-the transfer, just its efficiency. One way to avoid this is to disable
+the transfer (i.e. which files are hard-linked together), just its efficiency
+(i.e. copying the data for a new, early copy of a hard-linked file that could
+have been found later in the transfer in another member of the hard-linked
+set of files). One way to avoid this inefficiency is to disable
incremental recursion using the bf(--no-inc-recursive) option.
dit(bf(-p, --perms)) This option causes the receiving rsync to set the
up less space on the destination. Conflicts with bf(--inplace) because it's
not possible to overwrite data in a sparse fashion.
-NOTE: Don't use this option when the destination is a Solaris "tmpfs"
-filesystem. It seems to have problems seeking over null regions,
-and ends up corrupting the files.
-
dit(bf(-n, --dry-run)) This makes rsync perform a trial run that doesn't
make any changes (and produces mostly the same output as a real run). It
is most commonly used in combination with the bf(-v, --verbose) and/or
quote(quote(tt(RCS SCCS CVS CVS.adm RCSLOG cvslog.* tags TAGS .make.state
.nse_depinfo *~ #* .#* ,* _$* *$ *.old *.bak *.BAK *.orig *.rej .del-*
-*.a *.olb *.o *.obj *.so *.exe *.Z *.elc *.ln core .svn/ .git/ .bzr/)))
+*.a *.olb *.o *.obj *.so *.exe *.Z *.elc *.ln core .svn/ .git/ .hg/ .bzr/)))
then, files listed in a $HOME/.cvsignore are added to the list and any
files listed in the CVSIGNORE environment variable (all cvsignore names
filenames will be translated from the sending host's charset to the
receiving host's charset.
+NOTE: sorting the list of files in the --files-from input helps rsync to be
+more efficient, as it will avoid re-visiting the path elements that are shared
+between adjacent entries. If the input is not sorted, some path elements
+(implied directories) may end up being scanned multiple times, and rsync will
+eventually unduplicate them after they get turned into file-list elements.
+
dit(bf(-0, --from0)) This tells rsync that the rules/filenames it reads from a
file are terminated by a null ('\0') character, not a NL, CR, or CR+LF.
This affects bf(--exclude-from), bf(--include-from), bf(--files-from), and any
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