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README
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README
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A 5 Minute Guide to Orcehstra
-----------------------------
What is it?
===========
Orchestra is a series of tools for Getting Shit Run.
It consists of a Conductor, which is the coordinating process, and
Players, which are the actual daemons running on nodes to do the work.
To prevent arbitrary execution of code, Players can only execute
predefined scores which have to be installed on them seperately. You
can use puppet, cfengine or other configuration management system to
do this.
Canonically, entities requesting work to be done are known as the
Audience.
Please read the Orchestra paper (in doc/) for more information.
License
=======
Copyright (c) 2011, Anchor Systems Pty Ltd
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Anchor Systems Pty Ltd nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Building
========
Install the Go Release 59 compiler.
From the top level directory, run make. It will use goinstall to
build the binaries in bin/
Source Layout
=============
src/ -- All the go sources for the conductor, player, and the
submitjob and getstatus sample implementations.
doc/ -- Documentation about Orchestra and it's implementation.
samples/ -- Sample configuration files.
clientlibs/ -- Sample client libraries for communicating with the
Conductor as the Audience.
New In This Release
===================
v0.2.0:
* First public release.
Known Issues
============
* There is no clean up of job data, or persistance of results at this
time. This is intended to be implemented as soon as time permits.
* getstatus gets back a lot more information than it displays.
* No efficient 'wait for job' interface yet. You have to poll the
audience interface for completion results for now. (The polls are,
however, stupidly cheap)
* Disconnect/Reconnect behaviour for players is not particualrly well
tested. Annecdotal evidence suggests that this is relatively
robust however.
* Jobs will be left dangling if a player is removed from the
conductor's configuration and the conductor HUP'd whilst there is
still work pending for that player.
* Some of the more advanced score scheduling ideas that we've had
remain unimplemented, resulting in Orchestra looking a lot blander
than it really is meant to be.
* There is no support for CRLs yet.