BriteNetworkTopology

public final class BriteNetworkTopology implements NetworkTopology

Implements a network layer by reading the topology from a file in the BRITE format, the Boston university Representative Topology gEnerator, and generates a topological network from it. Information of this network is used to simulate latency in network traffic of CloudSim.

The topology file may contain more nodes than the number of entities in the simulation. It allows users to increase the scale of the simulation without changing the topology file. Nevertheless, each CloudSim entity must be mapped to one (and only one) BRITE node to allow proper work of the network simulation. Each BRITE node can be mapped to only one entity at a time.

Author:Rodrigo N. Calheiros, Anton Beloglazov

See also: .getInstance(String)

Constructors

BriteNetworkTopology

public BriteNetworkTopology()

Instantiates a Network Topology.

See also: .BriteNetworkTopology(String), .BriteNetworkTopology(InputStreamReader), .getInstance(String)

BriteNetworkTopology

public BriteNetworkTopology(String filePath)

Instantiates a Network Topology if a given file exists and can be successfully parsed. File is written in the BRITE format and contains topological information on simulation entities.

Parameters:

• filePath – the path of the BRITE file

See also: .BriteNetworkTopology(), .BriteNetworkTopology(InputStreamReader), .getInstance(String)

Methods

addLink

public void addLink(long srcId, long destId, double bandwidth, double latency)

getBwMatrix

public double[][] getBwMatrix()

Gets acopy of the matrix containing the bandwidth between every pair of nodes in the network.

getDelay

public double getDelay(long srcID, long destID)

getInstance

public static BriteNetworkTopology getInstance(String fileName)

Instantiates a Network Topology from a file inside the application’s resource directory.

Parameters:

• fileName – the relative name of the BRITE file

Returns:

the BriteNetworkTopology instance.

getTopologycalGraph

public TopologicalGraph getTopologycalGraph()

isNetworkEnabled

public boolean isNetworkEnabled()

mapNode

public void mapNode(long cloudSimEntityID, int briteID)

unmapNode

public void unmapNode(long cloudSimEntityID)