/*
 * Copyrights     : CNRS
 * Author         : Oleg Lodygensky
 * Acknowledgment : XtremWeb-HEP is based on XtremWeb 1.8.0 by inria : http://www.xtremweb.net/
 * Web            : http://www.xtremweb-hep.org
 * 
 *      This file is part of XtremWeb-HEP.
 *
 *    XtremWeb-HEP is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    XtremWeb-HEP is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with XtremWeb-HEP.  If not, see <http://www.gnu.org/licenses/>.
 *
 */


********************************************
*                XWHEP-7.6.3               *
*------------------------------------------*
* Release date : Oct 23rd, 2011            *
* Author : Oleg Lodygensky                 *
*          lodygens@lal.in2p3.fr           *
* Trac   : https://trac.lal.in2p3.fr/DGHEP *
********************************************


Developments are tracked on our trac server referred above.



-A- Corrections

-A.1- usage of Zipper.java modified so that we now use file name only for entries having a path starting with a '/' or containing "../"
      (e.g. "/var/log/dummy.log" is compressed as "dummy.log"; "/home../var/log/dummy.log" too)
-A.2- a bug corrected in Zipper.java so that compressed results by the worker don't start with '/' any more
-A.3- to avoid misbehavior, a worker not presenting a version equaling the server one receives no job
 
-B- New features

- none -

-C- Known Bugs

-C.1- Result download errors reported using 'xwdownload', but not with 'xwresult'
  We have not been able to reproduce them
  If you encounter these, please send us log file in DEBUG mode
-C.2- xtremweb.gmond.pl does not scale
-C.3- the scheduler is not fair
-C.4- there may be some concurrent access problems leading to some errors
      There may be two concurrent accesses problems
        - on server side, DB access may lead to inconsistency between works and tasks tables
	  This could certainly be solved using SQL transactions
	  But we would then need MySQL >=5
	  There are sime issues withe transactions with hsqldb
	- on worker side, file access if a worker is configured to run jobs in parallel (default one thread per CPU core)

	We have observed that these concurrent access problems may lead to up to 6% erroneous jobs.
	Until further notification, we consider this rate acceptable.


- Versionning -

Versionning is as follow
	- X is a major part of the version
	- Y is a minor part of the version
	- Z is the micro part of the version

(*) X reports a very important change : for example the communication protocol changes or a major new feature is modified/introduced/removed
When X changes, backward compatibility is not ensured

(*) Y reports a important but not critical change : backward compatibility is ensured

(*) Z reports a minor change : bug correction, documentation changes etc.