D5.9: Extended Simulation Environment - Phosphorus

D5.6 - Extended Simulation Environment
Figure 2 Node simulation cycle.
4 Optical Grid simulator
4.1 Introduction
The Phosphorus project addresses several key technical issues to enable on-demand, end to end network
services in an optical grid environment. In WP5 innovative architectures and algorithms have been proposed,
which are not, however, easy to test in a real life test bed. Therefore, in [1] we developed a simulator that
implements an optical grid network and a detailed job model that corresponds to a wide range of applications.
In the context of the present deliverable, we have extended the simulator, by implementing an additional key
feature and by optimizing important operations of it, so as to reach a certain performance level.
4.2 Overview
The simulator is written in Java and its base classes make up a discrete-event simulator, which models a
chronological sequence of events, each marking a change in the state of the system. The basic flow of the
simulator is as follows:
1. The various entities (switches, resources, clients …) are initialized.
2. System variables and the main clock are initialized.
3. An initial event is scheduled, i.e. an initial event is put into the event list from which a chain reaction of
other events will occur.
4. While the simulator does not reach its ending condition
a. Set clock to next event time.
b. Execute the next event and remove it from the event queue.
Project:
Phosphorus
Deliverable Number:
Date of Issue: 2009-03-31
EC Contract No.: 034115
Document Code:
19