How to Implement Network Cloud Storage in OMNeT++
To implement the network cloud storage in OMNeT++, we have to simulate a dispersed storage system in which the clients can be able to upload, download and handle data stored on remote servers. It should model the communication amongst clients and cloud storage servers as well as data transmission, storage management, capability imitation and redundancy mechanisms.
Follow the below step-by-step guide to implement a basic network cloud storage system in OMNeT++:
Step-by-Step Implementation:
- Set Up OMNeT++ and INET Framework
- Make certain to install both the OMNeT++ and the INET framework.
- Generate the new project in OMNeT++ and attach the INET framework which offers the necessary network modules.
- Design the Network Topology
- Use .ned file to build the network topology that contains numerous clients, one or more cloud storage servers and network elements like routers or switches.
Example .ned file:
network CloudStorageNetwork {
submodules:
client1: StandardHost {
@display(“p=100,200”);
}
client2: StandardHost {
@display(“p=300,200”);
}
client3: StandardHost {
@display(“p=200,300”);
}
storageServer1: StandardHost {
@display(“p=200,100”);
}
storageServer2: StandardHost {
@display(“p=350,100”);
}
router: Router {
@display(“p=200,150”);
}
connections:
client1.ethg++ <–> Ethernet100M <–> router.pppg++;
client2.ethg++ <–> Ethernet100M <–> router.pppg++;
client3.ethg++ <–> Ethernet100M <–> router.pppg++;
router.pppg++ <–> Ethernet1G <–> storageServer1.ethg++;
router.pppg++ <–> Ethernet1G <–> storageServer2.ethg++;
}
This network has three clients and two cloud storage servers linked through a router.
- Model Cloud Storage Operations
- Execute modules to mimic cloud storage operations like file uploads, downloads, and data management.
3.1 File Upload Simulation
- Execute a module that replicates a client uploading a file to the cloud storage server:
class FileUploadApp : public cSimpleModule {
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void uploadFile();
};
void FileUploadApp::initialize() {
scheduleAt(simTime() + 1, new cMessage(“uploadFile”)); // Start upload after 1 second
}
void FileUploadApp::handleMessage(cMessage *msg) {
if (strcmp(msg->getName(), “uploadFile”) == 0) {
uploadFile();
delete msg;
}
}
void FileUploadApp::uploadFile() {
cPacket *fileChunk = new cPacket(“fileChunk”);
fileChunk->setByteLength(1000000); // Example: 1 MB per chunk
send(fileChunk, “out”);
EV << “Uploaded file chunk at ” << simTime() << endl;
}
3.2 File Download Simulation
- Deploy a module that simulates a client downloading a file from the cloud storage server:
class FileDownloadApp : public cSimpleModule {
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void requestFile();
};
void FileDownloadApp::initialize() {
scheduleAt(simTime() + 2, new cMessage(“requestFile”)); // Start download after 2 seconds
}
void FileDownloadApp::handleMessage(cMessage *msg) {
if (strcmp(msg->getName(), “requestFile”) == 0) {
requestFile();
delete msg;
}
}
void FileDownloadApp::requestFile() {
cPacket *request = new cPacket(“fileRequest”);
send(request, “out”);
EV << “Requested file at ” << simTime() << endl;
}
The server would then manage the file request and send the data back to the client:
class StorageServerApp : public cSimpleModule {
protected:
virtual void handleMessage(cMessage *msg) override;
void sendFile(cMessage *request);
};
void StorageServerApp::handleMessage(cMessage *msg) {
if (strcmp(msg->getName(), “fileRequest”) == 0) {
sendFile(msg);
}
}
void StorageServerApp::sendFile(cMessage *request) {
cPacket *fileChunk = new cPacket(“fileChunk”);
fileChunk->setByteLength(1000000); // Example: 1 MB per chunk
send(fileChunk, “out”);
EV << “Sent file chunk at ” << simTime() << endl;
delete request;
}
3.3 Data Management and Redundancy
- Optionally, Execute data redundancy or replication to simulate more progressive cloud storage features.
Example of simple data replication amongst two storage servers:
class DataReplicationApp : public cSimpleModule {
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void replicateData();
};
void DataReplicationApp::initialize() {
scheduleAt(simTime() + 3, new cMessage(“replicateData”)); // Start replication after 3 seconds
}
void DataReplicationApp::handleMessage(cMessage *msg) {
if (strcmp(msg->getName(), “replicateData”) == 0) {
replicateData();
delete msg;
}
}
void DataReplicationApp::replicateData() {
cPacket *replica = new cPacket(“dataReplica”);
replica->setByteLength(1000000); // Example: 1 MB per replica
send(replica, “out”);
EV << “Replicated data at ” << simTime() << endl;
}
- Configure the Simulation
- Configure the simulation parameters to run the cloud storage simulation in the .ini file.
Example .ini file configuration:
[Config CloudStorageSimulation]
network = CloudStorageNetwork
sim-time-limit = 100s
*.client1.numApps = 2
*.client1.app[0].typename = “FileUploadApp”
*.client1.app[1].typename = “FileDownloadApp”
*.client2.numApps = 2
*.client2.app[0].typename = “FileUploadApp”
*.client2.app[1].typename = “FileDownloadApp”
*.client3.numApps = 2
*.client3.app[0].typename = “FileUploadApp”
*.client3.app[1].typename = “FileDownloadApp”
*.storageServer1.numApps = 1
*.storageServer1.app[0].typename = “StorageServerApp”
*.storageServer2.numApps = 1
*.storageServer2.app[0].typename = “StorageServerApp”
It includes setting up each client to upload and download files, with two storage servers managing these operations.
- Simulate Network Conditions
- Optionally, simulate different network conditions like latency, packet loss, and bandwidth limitations to study their influence on cloud storage performance.
Example of simulating network conditions:
**.delay = 20ms # Simulate 20ms latency on all connections
**.packetLossProbability = 0.01 # 1% packet loss on all connections
- Run the Simulation
- Implement the simulation in OMNeT++ to manage how the cloud storage system operates. Observe the transmission of files amongst clients and servers.
- Visualize the data flows and investigate the performance of file uploads, downloads, and data replication by using OMNeT++’s built-in tools.
- Analyze the Results
- Analyze the performance of the cloud storage system after simulation is done. Focus on metrics like upload/download speed, latency, packet loss, and the efficiency of data replication.
- Verify the records and output files to make certain that data transfers are completed successfully and that the simulation reflects realistic cloud storage behavior.
- Optimize and Extend
- Enhance the cloud storage simulation depends on the analysis. It may include modifying the data transfer rates, packet sizes, or intervals to improve performance.
- Consider extending the simulation to comprise more difficult scenarios like multi-server redundancy, dynamic resource assignment, or client-side caching.
- Execute security features like encryption or authentication to simulate secure cloud storage environments.
Throughout this manual, we offered the necessary steps to implement the Network Cloud Storage in OMNeT++by defining the network topology and we have to model the cloud storage operators include file upload, download and data management. We also include their examples using snippet codes. You can extend their functionalities to optimize the network. To seamlessly integrate Network Cloud Storage within the OMNeT++ framework for your esteemed projects, we stand ready to assist you. Reach out to omnet-manual.com for unparalleled guidance. Our team of researchers can provide you with a plethora of innovative project ideas.