JGroups 2.11 final released

FYI,

2.11.0.final can be downloaded here. Its main features, optimizations and bug fixes are listed below.

I hope that 2.12 will be the last release before finally going to 3.0 !

2.12 should be very small, currently it contains only 8 issues (mainly optimizations).

However, I also moved RELAY from 3.x to 2.12.

RELAY allows for connecting geographically separate clusters into a large virtual cluster. This will be interesting to apps which need to provide geographic failover. More on this in the next couple of weeks...

Meanwhile ... enjoy 2.11 !

Bela, Vladimir & Richard



Release Notes JGroups 2.11
==========================


Version: $Id: ReleaseNotes-2.11.txt,v 1.2 2010/10/29 11:45:35 belaban Exp $
Author: Bela Ban

JGroups 2.11 is API-backwards compatible with previous versions (down to 2.2.7).

Below is a summary (with links to the detailed description) of the major new features.


New features
============



AUTH: pattern matching to prevent unauthorized joiners
------------------------------------------------------
[https://jira.jboss.org/browse/JGRP-996]

New plugin for AUTH which can use pattern matching against regular expressions to prevent unauthorized
IP addresses to join a cluster.

Blog: http://belaban.blogspot.com/2010/09/cluster-authentication-with-pattern.html



DAISYCHAIN: implementation of daisy chaining
--------------------------------------------
[https://jira.jboss.org/browse/JGRP-1021]

Daisy chaining sends messages around in a ring, improving throughput for non IP multicast networks.

Blog: http://belaban.blogspot.com/2010/08/daisychaining-in-clouds.html



New flow control protocols for unicast (UFC) and multicast (MFC) messages
-------------------------------------------------------------------------
[https://jira.jboss.org/browse/JGRP-1154]

MFC and UFC replace FC. They can be used independently, and performance is faster than that of FC only.


API for programmatic creation of channel
----------------------------------------
[https://jira.jboss.org/browse/JGRP-1245]

Allows for programmatic creation of a JChannel, no need for XML config file.

Blog: http://belaban.blogspot.com/2010/10/programmatic-creation-of-channel.html


S3: new features
----------------
[https://jira.jboss.org/browse/JGRP-1234] Allow use of public buckets (no credentials need to be sent)
[https://jira.jboss.org/browse/JGRP-1235] Pre-signed URLs



STOMP: new protocol to allows STOMP clients to talk to a JGroups node
---------------------------------------------------------------------
[https://jira.jboss.org/browse/JGRP-1248]

Blog: http://belaban.blogspot.com/2010/10/stomp-for-jgroups.html







Optimizations
=============


NAKACK: simplify and optimize handling of OOB messages
------------------------------------------------------
[https://jira.jboss.org/browse/JGRP-1104]


Discovery: reduce number of discovery responses sent in a large cluster
-----------------------------------------------------------------------
[https://jira.jboss.org/browse/JGRP-1181]

A new propery (max_rank) determines who will and who won't send discovery responses.


New timer implementations
-------------------------
[https://jira.jboss.org/browse/JGRP-1051]

Way more effecient implementations of the timer (TimeScheduler).




Bug fixes
=========

ENCRYPT: encrypt entire message when length=0
---------------------------------------------
[https://jira.jboss.org/browse/JGRP-1242]

ENCRYPT would not encrypt messages whose length = 0


FD_ALL: reduce number of messages sent on suspicion
---------------------------------------------------
[https://jira.jboss.org/browse/JGRP-1241]


FILE_PING: empty files stop discovery
-------------------------------------
[https://jira.jboss.org/browse/JGRP-1246]




Manual
======

The manual is online at http://www.jgroups.org/manual/html/index.html



The complete list of features and bug fixes can be found at http://jira.jboss.com/jira/browse/JGRP.


Bela Ban, Kreuzlingen, Switzerland
Vladimir Blagojevic, Toronto, Canada
Richard Achmatowicz, Toronto, Canada

Nov 2010