ANNOUNCING allmydata.org "Tahoe", the Least-Authority Filesystem, v1.3

Discussion in 'Python' started by zooko, Feb 14, 2009.

  1. zooko

    zooko Guest

    Folks:

    This "Cloud Storage" system is written entirely in Python except for
    the CPU-intensive parts (cryptography and erasure coding), which are
    provided as Python extension modules. Thanks for making Python such
    a high-quality and effective tool!

    Regards,

    Zooko

    ANNOUNCING allmydata.org "Tahoe", the Least-Authority Filesystem, v1.3

    We are pleased to announce the release of version 1.3.0 of "Tahoe", the
    Least Authority Filesystem.

    Tahoe-LAFS is a secure, decentralized, fault-tolerant filesystem. All
    of the source code is available under a choice of two Free Software,
    Open Source licences.

    This filesystem is encrypted and distributed over multiple peers in
    such a way it continues to function even when some of the peers are
    unavailable, malfunctioning, or malicious.

    Here is the one-page explanation of the security and fault-tolerance
    properties that it offers:

    http://allmydata.org/source/tahoe/trunk/docs/about.html

    This is the successor to v1.2, which was released July 21, 2008 [1].
    This is a major new release, adding a repairer, an efficient backup
    command, support for large files, an (S)FTP server, and much more.

    See the NEWS file [2] and the known_issues.txt file [3] for more
    information.

    In addition to the many new features of Tahoe itself, a crop of related
    projects have sprung up, including Tahoe frontends for Windows and
    Macintosh, two front-ends written in JavaScript, a Tahoe plugin for
    duplicity, a Tahoe plugin for TiddlyWiki, a project to create a new
    backup tool, CIFS/SMB integration, an iPhone app, and three incomplete
    Tahoe frontends for FUSE. See Related Projects on the wiki: [4].


    COMPATIBILITY

    The version 1 branch of Tahoe is the basis of the consumer backup
    product from Allmydata, Inc. -- http://allmydata.com .

    Tahoe v1.3 is fully compatible with the version 1 branch of Tahoe.
    Files written by v1.3 clients can be read by clients of all versions
    back to v1.0 unless the file is too large -- files greater than about
    12 GiB (depending on the configuration) can't be read by older clients.
    v1.3 clients can read files produced by clients of all versions since
    v1.0. v1.3 servers can serve clients of all versions back to v1.0 and
    v1.3 clients can use servers of all versions back to v1.0 (but can't
    upload large files to them).

    This is the fourth release in the version 1 series. We believe that
    this version of Tahoe is stable enough to rely on as a permanent store
    of valuable data. The version 1 branch of Tahoe will be actively
    supported and maintained for the forseeable future, and future versions
    of Tahoe will retain the ability to read files and directories produced
    by Tahoe v1 for the forseeable future.


    WHAT IS IT GOOD FOR?

    With Tahoe, you can distribute your filesystem across a set of
    computers, such that if some of the computers fail or turn out to be
    malicious, the entire filesystem continues to be available, thanks to
    the remaining computers. You can also share your files with other
    users, using a simple and flexible access control scheme.

    Because this software is new, we do not categorically recommend it as
    the sole repository of data which is extremely confidential or
    precious. However, we believe that erasure coding, strong encryption,
    Free/Open Source Software and careful engineering make Tahoe safer than
    common alternatives, such as RAID, removable drive, tape, or "on-line
    storage" or "Cloud storage" systems.

    This software comes with extensive unit tests [5], and there are no
    known security flaws which would compromise confidentiality or data
    integrity. (For all currently known issues please see the
    known_issues.txt file [2].)

    This release of Tahoe is suitable for the "friendnet" use case [6] --
    it is easy to create a filesystem spread over the computers of you and
    your friends so that you can share disk space and files.


    LICENCE

    You may use this package under the GNU General Public License, version
    2 or, at your option, any later version. See the file "COPYING.GPL"
    [7] for the terms of the GNU General Public License, version 2.

    You may use this package under the Transitive Grace Period Public
    Licence, version 1.0. The Transitive Grace Period Public Licence has
    requirements similar to the GPL except that it allows you to wait for
    up to twelve months after you redistribute a derived work before
    releasing the source code of your derived work. See the file
    "COPYING.TGPPL.html" [8] for the terms of the Transitive Grace Period
    Public Licence, version 1.0.

    (You may choose to use this package under the terms of either licence,
    at your option.)


    INSTALLATION

    Tahoe works on Linux, Mac OS X, Windows, Cygwin, and Solaris, and
    probably most other systems. Start with "docs/install.html" [9].


    HACKING AND COMMUNITY

    Please join us on the mailing list [10]. Patches that extend and
    improve Tahoe are gratefully accepted -- the RoadMap page [11] shows
    the next improvements that we plan to make and CREDITS [12] lists the
    names of people who've contributed to the project. The wiki Dev page
    [13] contains resources for hackers.


    SPONSORSHIP

    Tahoe is sponsored by Allmydata, Inc. [14], a provider of commercial
    backup services. Allmydata, Inc. created the Tahoe project, and
    contributes hardware, software, ideas, bug reports, suggestions,
    demands, and money (employing several Tahoe hackers and instructing
    them to spend part of their work time on this Free Software project).
    Also they award customized t-shirts to hackers who find security flaws
    in Tahoe (see http://hacktahoe.org ). Thank you to Allmydata, Inc. for
    their generous and public-spirited support.


    Zooko Wilcox-O'Hearn
    on behalf of the allmydata.org team

    Special acknowledgment goes to Brian Warner, whose superb engineering
    skills and dedication are primarily responsible for the Tahoe
    implementation, and largely responsible for the Tahoe design as well,
    not to mention most of the docs and many other things besides.

    February 13, 2009
    Boulder, Colorado, USA

    [1] http://allmydata.org/trac/tahoe/browser/relnotes.txt?rev=2789
    [2] http://allmydata.org/trac/tahoe/browser/NEWS
    [3] http://allmydata.org/trac/tahoe/browser/docs/known_issues.txt
    [4] http://allmydata.org/trac/tahoe/wiki/RelatedProjects
    [5] http://allmydata.org/trac/tahoe/wiki/Dev
    [6] http://allmydata.org/trac/tahoe/wiki/UseCases
    [7] http://allmydata.org/trac/tahoe/browser/COPYING.GPL
    [8] http://allmydata.org/source/tahoe/trunk/COPYING.TGPPL.html
    [9] http://allmydata.org/source/tahoe/trunk/docs/install.html
    [10] http://allmydata.org/cgi-bin/mailman/listinfo/tahoe-dev
    [11] http://allmydata.org/trac/tahoe/roadmap
    [12] http://allmydata.org/trac/tahoe/browser/CREDITS?rev=2677
    [13] http://allmydata.org/trac/tahoe/wiki/Dev
    [14] http://allmydata.com
     
    zooko, Feb 14, 2009
    #1
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