-*- indented-text -*-
-URGENT ---------------------------------------------------------------
+BUGS ---------------------------------------------------------------
+
+rsync-url barfs on upload
+
+ rsync foo rsync://localhost/transfer/
+
+ Fix the parser.
+
+
+There seems to be a bug with hardlinks
+
+ mbp/2 build$ ls -l /tmp/a /tmp/b -i
+ /tmp/a:
+ total 32
+ 2568307 -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a1
+ 2568307 -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a2
+ 2568307 -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a3
+ 2568310 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 a4
+ 2568310 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 a5
+ 2568310 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b1
+ 2568310 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b2
+ 2568310 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b3
+
+ /tmp/b:
+ total 32
+ 2568309 -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a1
+ 2568309 -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a2
+ 2568309 -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a3
+ 2568311 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 a4
+ 2568311 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 a5
+ 2568311 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b1
+ 2568311 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b2
+ 2568311 -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b3
+ mbp/2 build$ rm -r /tmp/b && ./rsync -avH /tmp/a/ /tmp/b
+ building file list ... done
+ created directory /tmp/b
+ ./
+ a1
+ a4
+ a2 => a1
+ a3 => a2
+ wrote 350 bytes read 52 bytes 804.00 bytes/sec
+ total size is 232 speedup is 0.58
+ mbp/2 build$ rm -r /tmp/b
+ mbp/2 build$ ls -l /tmp/b
+ ls: /tmp/b: No such file or directory
+ mbp/2 build$ rm -r /tmp/b && ./rsync -avH /tmp/a/ /tmp/b
+ rm: cannot remove `/tmp/b': No such file or directory
+ mbp/2 build$ rm -f -r /tmp/b && ./rsync -avH /tmp/a/ /tmp/b
+ building file list ... done
+ created directory /tmp/b
+ ./
+ a1
+ a4
+ a2 => a1
+ a3 => a2
+ wrote 350 bytes read 52 bytes 804.00 bytes/sec
+ total size is 232 speedup is 0.58
+ mbp/2 build$ ls -l /tmp/b
+ total 32
+ -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a1
+ -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a2
+ -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a3
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 a4
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 a5
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b1
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b2
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b3
+ mbp/2 build$ ls -l /tmp/a
+ total 32
+ -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a1
+ -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a2
+ -rw-rw-r-- 3 mbp mbp 29 Mar 25 17:30 a3
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 a4
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 a5
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b1
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b2
+ -rw-rw-r-- 5 mbp mbp 29 Mar 25 17:30 b3
+
+
+Progress indicator can produce corrupt output when transferring directories:
+
+ main/binary-arm/
+ main/binary-arm/admin/
+ main/binary-arm/base/
+ main/binary-arm/comm/8.56kB/s 0:00:52
+ main/binary-arm/devel/
+ main/binary-arm/doc/
+ main/binary-arm/editors/
+ main/binary-arm/electronics/s 0:00:53
+ main/binary-arm/games/
+ main/binary-arm/graphics/
+ main/binary-arm/hamradio/
+ main/binary-arm/interpreters/
+ main/binary-arm/libs/6.61kB/s 0:00:54
+ main/binary-arm/mail/
+ main/binary-arm/math/
+ main/binary-arm/misc/
+
+
+lchmod
+ I don't think we handle this properly on systems that don't have the
+ call. Are there any such?
-IMPORTANT ------------------------------------------------------------
+Cross-test versions
+ Part of the regression suite should be making sure that we don't
+ break backwards compatibility: old clients vs new servers and so
+ on. Ideally we would test the cross product of versions.
+
+ It might be sufficient to test downloads from well-known public
+ rsync servers running different versions of rsync. This will give
+ some testing and also be the most common case for having different
+ versions and not being able to upgrade.
+
+--no-blocking-io might be broken
+
+ in the same way as --no-whole-file; somebody needs to check.
+
+Do not rely on having a group called "nobody"
+
+ http://www.linuxbase.org/spec/refspecs/LSB_1.1.0/gLSB/usernames.html
+
+ On Debian it's "nogroup"
+
+DAEMON --------------------------------------------------------------
+
+server-imposed bandwidth limits
+
+rsyncd over ssh
+
+ There are already some patches to do this.
+
+ BitKeeper uses a server whose login shell is set to bkd. That's
+ probably a reasonable approach.
+
+
+FEATURES ------------------------------------------------------------
+
+
+--dry-run is too dry
+
+ Mark Santcroos points out that -n fails to list files which have
+ only metadata changes, though it probably should.
+
+ There may be a Debian bug about this as well.
use chroot
http://lists.samba.org/pipermail/rsync/2001-August/thread.html
http://lists.samba.org/pipermail/rsync/2001-September/thread.html
---files-from
- Avoids traversal. Better option than a pile of --include statements
- for people who want to generate the file list using a find(1)
- command or a script.
+supplementary groups
+
+ Perhaps allow supplementary groups to be specified in rsyncd.conf;
+ then make the first one the primary gid and all the rest be
+ supplementary gids.
+
File list structure in memory
Rather than one big array, perhaps have a tree in memory mirroring
- the directory tree.
+ the directory tree.
This might make sorting much faster! (I'm not sure it's a big CPU
- problem, mind you.)
+ problem, mind you.)
It might also reduce memory use in storing repeated directory names
- -- again I'm not sure this is a problem.
+-- again I'm not sure this is a problem.
Performance
through the pipeline at the same time. For example we might have
updated the first occurrence after reading the checksums for the
second. So possibly we just need to make sure that we don't have
- both in the pipeline at the same time.
+ both in the pipeline at the same time.
Possibly if we did one directory at a time that would be sufficient.
Hard-link handling
At the moment hardlink handling is very expensive, so it's off by
- default. It does not need to be so.
+ default. It does not need to be so.
Since most of the solutions are rather intertwined with the file
list it is probably better to fix that first, although fixing
but I have not seen them.
When trying to reproduce hard links, we only need to worry about
- files that have more than one name (nlinks>1 && !S_ISDIR).
+ files that have more than one name (nlinks>1 && !S_ISDIR).
The basic point of this is to discover alternate names that refer to
the same file. All operations, including creating the file and
might need a little program to check whether several names refer to
the same file.
-IPv6
+
+Handling IPv6 on old machines
+
+ The KAME IPv6 patch is nice in theory but has proved a bit of a
+ nightmare in practice. The basic idea of their patch is that rsync
+ is rewritten to use the new getaddrinfo()/getnameinfo() interface,
+ rather than gethostbyname()/gethostbyaddr() as in rsync 2.4.6.
+ Systems that don't have the new interface are handled by providing
+ our own implementation in lib/, which is selectively linked in.
+
+ The problem with this is that it is really hard to get right on
+ platforms that have a half-working implementation, so redefining
+ these functions clashes with system headers, and leaving them out
+ breaks. This affects at least OSF/1, RedHat 5, and Cobalt, which
+ are moderately improtant.
+
+ Perhaps the simplest solution would be to have two different files
+ implementing the same interface, and choose either the new or the
+ old API. This is probably necessary for systems that e.g. have
+ IPv6, but gethostbyaddr() can't handle it. The Linux manpage claims
+ this is currently the case.
+
+ In fact, our internal sockets interface (things like
+ open_socket_out(), etc) is much narrower than the getaddrinfo()
+ interface, and so probably simpler to get right. In addition, the
+ old code is known to work well on old machines.
+
+ We could drop the rather large lib/getaddrinfo files.
+
+
+Other IPv6 stuff:
+
Implement suggestions from http://www.kame.net/newsletter/19980604/
and ftp://ftp.iij.ad.jp/pub/RFC/rfc2553.txt
colons, they tend to break most naming systems, including ours.
Based on the HTTP IPv6 syntax, I think we should use
- rsync://[::1]/foo/bar
- [::1]::bar
+ rsync://[::1]/foo/bar [::1]::bar
which should just take a small change to the parser code.
"The dungeon collapses! You are killed." Rather than "unexpected
eof" give a message that is more detailed if possible and also more
- helpful.
+ helpful.
If we get an error writing to a socket, then we should perhaps
continue trying to read to see if an error message comes across
work, but it would certainly make our messages more helpful.
What happens if a directory is missing -x attributes. Do we lose
- our load? (Debian #28416) Probably fixed now, but a test case
- would be good.
+ our load? (Debian #28416) Probably fixed now, but a test case would
+ be good.
File attributes
zlib
- Perhaps don't use our own zlib.
+ Perhaps don't use our own zlib.
Advantages:
Keep stderr and stdout properly separated (Debian #23626)
+ After we get the @RSYNCD greeting from the server, we know it's
+ version but we have not yet sent the command line, so we could just
+ remove the -z option if the server is too old.
-rsyncd over ssh
+ For ssh invocation it's not so simple, because we actually use the
+ command line to start the remote process. However, we only actually
+ do compression in token.c, and we could therefore once we discover
+ the remote version emit an error if it's too old. I'm not sure if
+ that's a good tradeoff or not.
- There are already some patches to do this.
proxy authentication
Allow RSYNC_PROXY to be http://user:pass@proxy.foo:3128/, and do
- HTTP Basic Proxy-Authentication.
+ HTTP Basic Proxy-Authentication.
Multiple schemes are possible, up to and including the insanity that
is NTLM, but Basic probably covers most cases.
Add --with-socks, and then perhaps a command-line option to put them
on or off. This might be more reliable than LD_PRELOAD hacks.
+FAT support
+
+ rsync to a FAT partition on a Unix machine doesn't work very well at
+ the moment. I think we get errors about invalid filenames and
+ perhaps also trying to do atomic renames.
+
+ I guess the code to do this is currently #ifdef'd on Windows;
+ perhaps we ought to intelligently fall back to it on Unix too.
+
+
Better statistics:
<Rasmus> mbp: hey, how about an rsync option that just gives you the
summary without the list of files? And perhaps gives more
information like the number of new files, number of changed,
- deleted, etc. ?
- <mbp> Rasmus: nice idea
- <mbp> there is --stats
- <mbp> but at the moment it's very tridge-oriented
- <mbp> rather than user-friendly
- <mbp> it would be nice to improve it
- <mbp> that would also work well with --dryrun
+ deleted, etc. ? <mbp> Rasmus: nice idea <mbp> there is --stats
+ <mbp> but at the moment it's very tridge-oriented <mbp> rather than
+ user-friendly <mbp> it would be nice to improve it <mbp> that would
+ also work well with --dryrun
TDB:
chmod:
- On 12 Mar 2002, Dave Dykstra <dwd@bell-labs.com> wrote:
- > If we would add an option to do that functionality, I would vote for one
- > that was more general which could mask off any set of permission bits and
- > possibly add any set of bits. Perhaps a chmod-like syntax if it could be
- > implemented simply.
+ On 12 Mar 2002, Dave Dykstra <dwd@bell-labs.com> wrote: > If we
+would add an option to do that functionality, I would vote for one >
+that was more general which could mask off any set of permission bits
+and > possibly add any set of bits. Perhaps a chmod-like syntax if it
+could be > implemented simply.
- I think that would be good too. For example, people uploading files
+ I think that would be good too. For example, people uploading files
to a web server might like to say
rsync -avzP --chmod a+rX ./ sourcefrog.net:/home/www/sourcefrog/
Ideally the patch would implement as many of the gnu chmod semantics
as possible. I think the mode parser should be a separate function
- that passes back something like (mask,set) description to the rest of
- the program. For bonus points there would be a test case for the
+ that passes back something like (mask,set) description to the rest
+ of the program. For bonus points there would be a test case for the
parser.
+ Possibly also --chown
+
(Debian #23628)
(Suggestion from david.e.sewell)
+Incorrect timestamps (Debian #100295)
+
+ A bit hard to believe, but apparently it happens.
+
+
+Check "refuse options works"
+
+ We need a test case for this...
+
+ Was this broken when we changed to popt?
+
+
+PERFORMANCE ----------------------------------------------------------
+
+MD4 file_sum
+
+ If we're doing a local transfer, or using -W, then perhaps don't
+ send the file checksum. If we're doing a local transfer, then
+ calculating MD4 checksums uses 90% of CPU and is unlikely to be
+ useful.
+
+ Indeed for transfers over zlib or ssh we can also rely on the
+ transport to have quite strong protection against corruption.
+
+ Perhaps we should have an option to disable this, analogous to
+--whole-file, although it would default to disabled. The file
+checksum takes up a definite space in the protocol -- we can either
+set it to 0, or perhaps just leave it out.
+
+MD4
+
+ Perhaps borrow an assembler MD4 from someone?
+
+ Make sure we call MD4 with properly-sized blocks whenever possible
+ to avoid copying into the residue region?
+
+String area code
+
+ Test whether this is actually faster than just using malloc(). If
+ it's not (anymore), throw it out.
+
+
PLATFORMS ------------------------------------------------------------
Win32
http://sources.redhat.com/ml/cygwin/2001-08/msg00234.html
- According to "Effective TCP/IP Programming" (??) close() on a socket
- has incorrect behaviour on Windows -- it sends a RST packet to the
- other side, which gives a "connection reset by peer" error. On that
- platform we should probably do shutdown() instead. However, on Unix
- we are correct to call close(), because shutdown() discards
- untransmitted data.
DEVELOPMENT ----------------------------------------------------------
http://devel-home.kde.org/~sewardj/
+Release script
+
+ Update spec files
+
+ Build tar file; upload
+
+ Send announcement to mailing list and c.o.l.a.
+
+ Make freshmeat announcement
+
+ Update web site
+
+
+
TESTING --------------------------------------------------------------
Cross-test versions
Part of the regression suite should be making sure that we don't
- break backwards compatibility: old clients vs new servers and so
- on. Ideally we would test the cross product of versions.
+ break backwards compatibility: old clients vs new servers and so on.
+ Ideally we would test both up and down from the current release to
+ all old versions.
+
+ We might need to omit broken old versions, or versions in which
+ particular functionality is broken
It might be sufficient to test downloads from well-known public
rsync servers running different versions of rsync. This will give
some testing and also be the most common case for having different
versions and not being able to upgrade.
+
+Test on kernel source
+
+ Download all versions of kernel; unpack, sync between them. Also
+ sync between uncompressed tarballs. Compare directories after
+ transfer.
+
+ Use local mode; ssh; daemon; --whole-file and --no-whole-file.
+
+ Use awk to pull out the 'speedup' number for each transfer. Make
+ sure it is >= x.
+
+
Test large files
Sparse and non-sparse
Test daemon feature to disallow particular options.
+Pipe program that makes slow/jerky connections.
+
+Versions of read() and write() that corrupt the stream, or abruptly
+fail
+
+Separate makefile target to run rough tests -- or perhaps just run
+them every time?
+
+Test "refuse options" works
+
+ What about for --recursive?
+
+ If you specify an unrecognized option here, you should get an error.
+
DOCUMENTATION --------------------------------------------------------
Update web site from CVS
+
+Perhaps redo manual as SGML
+
+ The man page is getting rather large, and there is more information
+ that ought to be added.
+
+ TexInfo source is probably a dying format.
+
+ Linuxdoc looks like the most likely contender. I know DocBook is
+ favoured by some people, but it's so bloody verbose, even with emacs
+ support.
+
+
BUILD FARM -----------------------------------------------------------
Add machines
- AMDAHL UTS (Dave Dykstra)
-
Cygwin (on different versions of Win32?)
HP-UX variants (via HP?)
SCO
-NICE -----------------------------------------------------------------
---no-detach and --no-fork options
+LOGGING --------------------------------------------------------------
- Very useful for debugging. Also good when running under a
- daemon-monitoring process that tries to restart the service when the
- parent exits.
+ Perhaps flush stdout after each filename, so that people trying to
+ monitor progress in a log file can do so more easily. See
+ http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=48108
-hang/timeout friendliness
+ At the connections that just get a list of modules are not logged,
+ but they should be.
+
+ If a child of the rsync daemon dies with a signal, we should notice
+ that when we reap it and log a message.
+
+ Keep stderr and stdout properly separated (Debian #23626)
+
+ Use a separate function for reporting errors; prefix it with
+ "rsync:" or "rsync(remote)", or perhaps even "rsync(local
+ generator): ".
verbose output
At end of transfer, show how many files were or were not transferred
correctly.
+-vv
+
+ Explain *why* every file is transferred or not (e.g. "local mtime
+ 123123 newer than 1283198")
+
+
+debugging of daemon
+
+ Add an rsyncd.conf parameter to turn on debugging on the server.
+
+
+
+NICE -----------------------------------------------------------------
+
+--no-detach and --no-fork options
+
+ Very useful for debugging. Also good when running under a
+ daemon-monitoring process that tries to restart the service when the
+ parent exits.
+
+hang/timeout friendliness
+
internationalization
Change to using gettext(). Probably need to ship this for platforms
- that don't have it.
+ that don't have it.
Solicit translations.
- Does anyone care?
+ Does anyone care? Before we bother modifying the code, we ought to
+ get the manual translated first, because that's possibly more useful
+ and at any rate demonstrates desire.
-rsyncsh
+rsyncsh
Write a small emulation of interactive ftp as a Pythonn program
that calls rsync. Commands such as "cd", "ls", "ls *.c" etc map
fairly directly into rsync commands: it just needs to remember the
current host, directory and so on. We can probably even do
completion of remote filenames.
+
+
+RELATED PROJECTS -----------------------------------------------------
+
+http://rsync.samba.org/rsync-and-debian/
+
+rsyncable gzip patch
+
+ Exhaustive, tortuous testing
+
+ Cleanups?
+
+rsyncsplit as alternative to real integration with gzip?
+
+reverse rsync over HTTP Range
+
+ Goswin Brederlow suggested this on Debian; I think tridge and I
+ talked about it previous in relation to rproxy.
+
+
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff