Mogilefs-client 3.0.0-rc1 released

A MogileFS client library for Ruby. MogileFS is an open source
distributed filesystem, see: http://mogilefs.org for more details. This
library allows any Ruby application to read, write and delete files in a
MogileFS instance.

To install this prerelease: gem install --pre mogilefs-client

mogilefs :: http://mogilefs.org/
list :: mailto:[email protected]
email :: mailto:[email protected]
repo :: git://bogomips.org/mogilefs-client.git
cgit :: http://bogomips.org/mogilefs-client.git
gitweb :: http://repo.or.cz/w/ruby-mogilefs-client.git

There’s a fair amount of internal changes and cleanups, but
most user-visible things should be relatively untouched.

=== client changes

  • “store_file” now accepts any IO object capable of streaming
    data (e.g. pipes and sockets). This uses chunked
    Transfer-Encoding for PUTs, so backend storage nodes
    will need to support this (latest mogstored does).

  • “store_file” no longer uses an infinite timeout when
    awaiting a response after a PUT, the new timeout for the
    response is now calculated based on the time and size of
    the PUT request.

  • new commands: “file_debug” and “file_info” (new commands
    in mogilefsd, be sure you have the latest version)

  • “get_paths” takes optional “:pathcount” parameter
    to control the number of returned paths.

  • “get_file_data” supports offset and count for partial
    transfer (requires support from storage node for
    Range: requests, most HTTP servers are capable of this)

  • IO.copy_stream is enabled by default under Ruby 1.9.3.
    Expect performance improvements.

  • “list_keys” with a passed block (for additional info) is
    faster due to internal pipelining implementation and the
    addition of “file_info” support.

  • fixed handling of “+” in key/domain names (old bug)

  • rare, truncated partial responses due to network/server
    failure now raise MogileFS::InvalidResponseError

=== admin changes

Admin support is still a work-in-progress,
I usually just find myself using “mogadm” anyways.

  • new admin commands: “replicate_now”

  • “get_stats” no longer works on new mogilefsd versions

  • get_domains handles “repl_policy” field correctly for classes
    in MogileFS 2.x

  • admin commands should convert all numeric fields to either
    Integer or Float objects and not String representations
    of numerics. Affected methods include:
    get_hosts, get_devices, list_fids, each_fids, get_domains

=== miscellany

  • we no longer add methods to standard Ruby classes
    (at least we never /changed/ existing methods :P)

  • {kgio}[http://bogomips.org/kgio] automatically used
    if available, but not required to avoid exceptions
    with non-blocking I/O

  • dropped Ruby 1.8.6 support, 1.8.7 or later is required.

  • Tested with MRI 1.8.7, 1.9.3 and Rubinius 1.2.4

  • MogileFS::Mysql - deprecated, to be removed in 2012

  • improved test suite

  • some optional experimental features/changes,
    see “git log” for details

  • Added internal pipelining implementation, this is
    not easy-to-use since the server can respond-out-of-order,
    but still useful for things like a list_keys+file_info
    loop.

Feedback (bug reports, user/development dicussion, patches, pull
requests) are greatly appreciated and handled via email. We currently
piggy-back onto the public MogileFS
{mailing list}[mailto:[email protected]] for feedback.

If you do not want to deal with the corporate host of the MogileFS
mailing list, or if you wish to keep your issue secret, feel free to
email {Eric W. at}[mailto:[email protected]].

Do not expect Eric W. to read HTML mail under any circumstances.

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