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Unison 2.45 beta-release now available

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  • Pierce Benjamin C.
    [This release is mainly small fixes and GUI improvements. Users that are happy with their current Unison installation probably don t need to bother updating.]
    Message 1 of 1 , Apr 5, 2012
      [This release is mainly small fixes and GUI improvements. Users that are happy with their current Unison installation probably don't need to bother updating.]

      Download address:

      Changes since 2.40.63:
      * New preference fastercheckUNSAFE, which can be used (with care!)
      to achieve much faster update detection when all the common files
      in the two replicas are known to be identical. See the manual for
      more information.
      This feature should still be considered experimental, but it's
      ready for other people to try out.
      * Added option clientHostName. If specified, it will be used to as
      the client host name, overriding UNISONLOCALHOSTNAME and the
      actual host name.
      * OS X GUI:
      + fix crash under Lion, because of problems with the toolbar,
      using the fix suggested in
      + uimacnew09 is now the standard graphical interface on OSX
      + A small improvement to the uimacnew09 interface from Alan
      Schmitt and Steve Kalkwarf: when Unison is run with the
      -batch flag, the interface will now automatically propagate
      changes and terminate, without waiting for user interaction.
      + Show a modal warning window if there is no archive for the
      hosts. The user can then choose to exit or proceed (proceed
      is the default). The window is not shown if the batch
      preference is true.
      + file details panel selectable
      * GTK GUI:
      + New version of uigtk2.ml from Matt Zagrabelny that
      reorganizes the icons in a slightly more intuitive way.
      * Minor fixes:
      + Setting the prefer preference to older or newer now
      propagates deletions when there is no conflict.
      + Correctly quote the path when running merge commands.
      + Add quotes to paths when calling external file watcher
      + Incorporate a patch to fsmonitor.py (the external filewatcher
      utility) from Tomasz Zernicki to make it work better under
      + Incorporated new version of fsmonitor.py from Christophe
      + Fixed incompatibility with OpenSSH 5.6.
      + Fixed fingerprint cache: do not cache file properties
      + Some spelling corrections in documentation and comments from
      Stephane Glondu
      + Fixed O_APPEND mode for open under Windows
      + Fixed String.sub invalid argument error when an AppleDouble
      file does not contain a finder information field
      + Trim duplicate paths when using "-repeat watch"
      + Unison now passes path arguments and -follow directives to
      fsmonitor.py. This seems to work except for one small issue
      with how fsmonitor.py treats -follow directives for
      directories that don't exist (or maybe this is an issue with
      how it treats any kind of monitoring when the thing being
      monitored doesn't exist?). If we create a symlink to a
      nonexistant directory, give Unison (hence fsmonitor.py) a
      'follow' directive for the symlink, start unison, and then
      create the directory, fsmonitor.py misses the change.
      + Lines added in profile files by unison always start at a new

      Changes since 2.40.1:
      * Added "BelowPath" patterns, that match a path as well as all paths
      below (convenient to use with nodeletion,update,creationpartial
      * Added a "fat" preference that makes Unison use the right options
      when one of the replica is on a FAT filesystem.
      * Allow "prefer/force=newer" even when not synchronizing
      modification times. (The reconciler will not be aware of the
      modification time of unchanged files, so the synchronization
      choices of Unison can be different from when "times=true", but the
      behavior remains sane: changed files with the most recent
      modification time will be propagated.)
      * Minor fixes and improvements:
      + Compare filenames up to decomposition in case sensitive mode
      when one host is running MacOSX and the unicode preference is
      set to true.
      + Rsync: somewhat faster compressor
      + Make Unicode the default on all architectures (it was only
      the default when a Mac OS X or Windows machine was involved).

      Changes since 2.32:
      * Major enhancement: Unicode support.
      + Unison should now handle unicode filenames correctly on all
      + This functionality is controlled by a new preference unicode.
      + Unicode mode is now the default when one of the hosts is
      under Windows or MacOS. This may make upgrades a bit more
      painful (the archives cannot be reused), but this is a much
      saner default.
      * Partial transfer of directories. If an error occurs while
      transferring a directory, the part transferred so far is copied
      into place (and the archives are updated accordingly). The
      "maxerrors" preference controls how many transfer error Unison
      will accept before stopping the transfer of a directory (by
      default, only one). This makes it possible to transfer most of a
      directory even if there are some errors. Currently, only the first
      error is reported by the GUIs.
      Also, allow partial transfer of a directory when there was an
      error deep inside this directory during update detection. At the
      moment, this is only activated with the text and GTK UIs, which
      have been modified so that they show that the transfer is going to
      be partial and so that they can display all errors.
      * Improvement to the code for resuming directory transfers:
      + if a file was not correctly transferred (or the source has
      been modified since, with unchanged size), Unison performs a
      new transfer rather than failing
      + spurious files are deleted (this can happen if a file is
      deleted on the source replica before resuming the transfer;
      not deleting the file would result in it reappearing on the
      target replica)
      * Experimental streaming protocol for transferring file contents
      (can be disabled by setting the directive "stream" to false): file
      contents is transfered asynchronously (without waiting for a
      response from the destination after each chunk sent) rather than
      using the synchronous RPC mechanism. As a consequence:
      + Unison now transfers the contents of a single file at a time
      (Unison used to transfer several contents simultaneously in
      order to hide the connection latency.)
      + the transfer of large files uses the full available bandwidth
      and is not slowed done due to the connection latency anymore
      + we get performance improvement for small files as well by
      scheduling many files simultaneously (as scheduling a file
      for transfer consume little ressource: it does not mean
      allocating a large buffer anymore)
      * Changes to the internal implementation of the rsync algorithm:
      + use longer blocks for large files (the size of a block is the
      square root of the size of the file for large files);
      + transmit less checksum information per block (we still have
      less than one chance in a hundred million of transferring a
      file incorrectly, and Unison will catch any transfer error
      when fingerprinting the whole file)
      + avoid transfer overhead (which was 4 bytes per block)
      For a 1G file, the first optimization saves a factor 50 on the
      amount of data transferred from the target to the source (blocks
      are 32768 bytes rather than just 700 bytes). The two other
      optimizations save another factor of 2 (from 24 bytes per block
      down to 10).
      * Implemented an on-disk file fingerprint cache to speed-up update
      detection after a crash: this way, Unison does not have do
      recompute all the file fingerprints from scratch.
      + When Unison detects that the archive case-sensitivity mode
      does not match the current settings, it populates the
      fingerprint cache using the archive contents. This way,
      changing the case-sensitivity mode should be reasonably fast.
      * New preferences "noupdate=root", "nodeletion=root",
      "nocreation=root" that prevent Unison from performing files
      updates, deletions or creations on the given root. Also 'partial'
      versions of 'noupdate', 'nodeletion' and 'nocreation'
      * Limit the number of simultaneous external copy program ("copymax"
      * New "links" preference. When set to false, Unison will report an
      error on symlinks during update detection. (This is the default
      when one host is running Windows but not Cygwin.) This is better
      than failing during propagation.
      * Added a preference "halfduplex" to force half-duplex communication
      with the server. This may be useful on unreliable links (as a more
      efficient alternative to "maxthreads = 1").
      * Renamed preference "pretendwin" to "ignoreinodenumbers" (an alias
      is kept for backwards compatibility).
      * Ignore one-second differences when synchronizing modification
      time. (Technically, this is an incompatible archive format change,
      but it is backward compatible. To trigger a problem, a user would
      have to synchronize modification times on a filesystem with a
      two-second granularity and then downgrade to a previous version of
      Unison, which does not work well in such a case. Thus, it does not
      seem worthwhile to increment the archive format number, which
      would impact all users.)
      * Do not keep many files simultaneously opened anymore when the
      rsync algorithm is in use.
      * Add "ignorearchives" preference to ignore existing archives (to
      avoid forcing users to delete them manually, in situations where
      one archive has gotten deleted or corrupted).
      * Mac OS
      + fixed rsync bug which could result in an "index out of
      bounds" error when transferring resource forks.
      + Fixed bug which made Unison ignore finder information and
      resource fork when compiled to 64bit on Mac OSX.
      + should now be 64 bit clean (the Growl framework is not up to
      date, though)
      + Made the bridge between Objective C and Ocaml code GC
      friendly (it was allocating ML values and putting them in an
      array which was not registered with the GC)
      + use darker grey arrows (patch contributed by Eric Y. Kow)
      * GTK user interface
      + assistant for creating profiles
      + profile editor
      + pop up a summary window when the replicas are not fully
      synchronized after transport
      + display estimated remaining time and transfer rate on the
      progress bar
      + allow simultaneous selection of several items
      + Do not reload the preference file before a new update
      detection if it is unchanged
      + disabled scrolling to the first unfinished item during
      transport. It goes way too fast when lot of small files are
      synchronized, and it makes it impossible to browse the file
      list during transport.
      + take into account the "height" preference again
      + the internal list of selected reconciler item was not always
      in sync with what was displayed (GTK bug?); workaround
      + Do not display "Looking for change" messages during
      propagation (when checking the targe is unchanged) but only
      during update detection
      + Apply patch to fix some crashes in the OSX GUI, thanks to
      Onne Gorter.
      * Text UI
      + During update detection, display status by updating a single
      line rather than generating a new line of output every so
      often. Should be less confusing.
      * Windows
      + Fastcheck is now the default under Windows. People mostly use
      NTFS nowadays and the Unicode API provides an equivalent to
      inode numbers for this filesystem.
      + Only use long UNC path for accessing replicas (as '..' is not
      handled with this format of paths, but can be useful)
      + Windows text UI: now put the console into UTF-8 output mode.
      This is the right thing to do when in Unicode mode, and is no
      worse than what we had previously otherwise (the console use
      some esoteric encoding by default). This only works when
      using a Unicode font instead of the default raster font.
      + Don't get the home directory from environment variable HOME
      under Windows (except for Cygwin binaries): we don't want the
      behavior of Unison to depends on whether it is run from a
      Cygwin shell (where HOME is set) or in any other way (where
      HOME is usually not set).
      * Miscellaneous fixes and improvements
      + Made a server waiting on a socket more resilient to
      unexpected lost connections from the client.
      + Small patch to property setting code suggested by Ulrich
      + Several fixes to the change transfer functions (both the
      internal ones and external transfers using rsync). In
      particular, limit the number of simultaneous transfer using
      an rsync (as the rsync algorithm can use a large amount of
      memory when processing huge files)
      + Keep track of which file contents are being transferred, and
      delay the transfer of a file when another file with the same
      contents is currently being transferred. This way, the second
      transfer can be skipped and replaced by a local copy.
      + Experimental update detection optimization: do not read the
      contents of unchanged directories
      + When a file transfer fails, turn off fastcheck for this file
      on the next sync.
      + Fixed bug with case insensitive mode on a case sensitive
      o if file "a/a" is created on one replica and directory
      "A" is created on the other, the file failed to be
      synchronized the first time Unison is run afterwards, as
      Unison uses the wrong path "a/a" (if Unison is run
      again, the directories are in the archive, so the right
      path is used);
      o if file "a" appears on one replica and file "A" appears
      on the other with different contents, Unison was unable
      to synchronize them.
      + Improved error reporting when the destination is updated
      during synchronization: Unison now tells which file has been
      updated, and how.
      + Limit the length of temporary file names
      + Case sensitivity information put in the archive (in a
      backward compatible way) and checked when the archive is
      + Got rid of the 16mb marshalling limit by marshalling to a
      + Resume copy of partially transferred files.
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