PlanetSim is an object oriented simulation
framework for overlay networks and services. This framework presents
a layered and modular architecture with well defined hotspots
documented using classical design patterns. In PlanetSim, developers
can work at two main levels: creating and testing new overlay
algorithms like Chord or Pastry, or creating and testing new
services (DHT, CAST, DOLR, etc) on top of existing overlays.
PlanetSim also aims to enable a smooth transition
from simulation code to experimentation code running in the
Internet. Because of this, we provide wrapper code that takes care
of network communication and permits us to run the same code in
network testbeds such as PlanetLab. Moreover, distributed services
in the simulator use the Common API for Structured Overlays. This
enables complete transparency to services running either against the
simulator or the network.
PlanetSim has been developed in the Java language
to reduce complexity and smooth the learning curve in our framework.
We however have profiled and optimised the code to enable scalable
simulations in reasonable time. To validate the utility of our
approach, we have implemented two overlays (Chord and Symphony) and
a variety of services like CAST, DHT, and object middleware. We have
proved that PlanetSim reproduces the measures of these environments
and is also efficient in its network implementation.
PlanetSim’s architecture comprises
three main extension layers constructed one atop another. Applications
are built in the upper layer using the standard Common API façade. This
façade is built on the routing services offered by the underlying
overlay layer. Besides, the overlay layer obtains proximity information
to other nodes asking information to the Network layer.
The Simulator dictates the overall life cycle of the framework by
calling the appropriate methods in the overlay's Node and obtaining
routing information to dispatch messages through the Network.

Distribution: Source
and binary code, written and compiled in Java
v1.4.2. License: PlanetSim is available
under a
LGPL-like license.
- March 13, 2005. Release
2.0.
- Release Notes:
This version
mantains the Chord and Symphony overlay
implementations under the simulation
framework.
Also includes GML output generation, fixed
bugs on Id generation, added new methods
as upcalls and downcalls between application
and node layer and more.
The Symphony overlay implementation has been
replaced with another one based on Behaviours.
It also includes the Javadoc html
documentation.
- Download:
planetsim_2.0.zip [source + binaries + javadoc]
- July 09, 2004. Release
1.0.
- Release Notes:
This version
includes the Chord and Symphony overlay
implementations under the simulation
framework.
It also includes the Javadoc html
documentation.
- Download:
planetsim_1_0.zip [source + binaries
]
|
Pedro
García López, full-time professor in the Department of
Computer Science and Mathematics at Universitat Rovira i Virgili in
Tarragona, Catalonia, Spain. Contact
<pgarcia@etse.urv.es>
Carles Pairot Gavaldà, PhD student in the Department of
Computer Science and Mathematics at Universitat Rovira i Virgili in
Tarragona, Catalonia, Spain. Contact
<cpairot@etse.urv.es>
Rubén Mondéjar Andreu, M. Sc. Computer
Science Student in the Department of Computer Science and
Mathematics at Universitat Rovira i Virgili in Tarragona, Catalonia,
Spain. Contact
<ruben.mondejar@estudiants.urv.es>
Jordi Pujol Ahulló, M. Sc. Computer Science
Student in the Department of Computer Science and Mathematics at
Universitat Rovira i Virgili in Tarragona, Catalonia, Spain. Contact
<jordi.pujol@estudiants.urv.es>
Helio Tejedor Navarro, M. Sc. Computer Science
Student in the Department of Computer Science and Mathematics at
Universitat Rovira i Virgili in Tarragona, Catalonia, Spain. Contact
<heliodoro.tejedor@estudiants.urv.es>
Marc Sanchez Artigas, PhD student in the Department
of Computer Science and Mathematics at Universitat Rovira i Virgili in Tarragona, Catalonia, Spain.
Contact
<marc.sanchez@estudiants.urv.es>
Coming Soon
The Chord Project
http://www.pdos.lcs.mit.edu/chord/
Pastry, Scribe, FreePastry
http://freepastry.rice.edu/
P2Psim
http://www.pdos.lcs.mit.edu/p2psim/
MACEDON
http://macedon.kcubes.com/
This framework is an open project, we present the new
features that can be implement by anyone.
Priority messages
Now priority of the all message are the same.
Proximity
In the current version, for the framework the real
distance between the nodes does not have importance.
NetworkWrapper evolution
In this moment, the experimentation part is a alpha
version.
Viewer Tools
It would be interesting that the results be presented
in a 3D model for example.
Distributed simulator
It would be interesting too, that the framework don't
only works in a unique machine, to distributed the load in a machine set
(LAN,cluster, etc).
New overlay protocols
We have said one of the few extension of the framework
is the protocol extension, so can be implement new overlays as Pastry,
Kademlia, etc....
New applications
The same of the previous feature, but in this case the
extension is at the application level.