To implement network cloud storage in ns3, we need to follow several steps. First, we need to create a network simulation for simulating the file storage and retrieval operations, by involving the components like data centers, client nodes, and servers. Below given steps will guide on how to implement Network Cloud Storage in ns3.
Step-by-step guide to implement Network cloud storage in ns3:
Step 1: Setup ns3 Environment
Make sure ns3 is installed on the system.
Step 2: Include Necessary Modules
Include the necessary ns3 modules in the script:
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/applications-module.h”
#include “ns3/flow-monitor-module.h”
Step 3: Create the Simulation Script
- Setup Nodes and Network:
using namespace ns3;
NS_LOG_COMPONENT_DEFINE (“NetworkCloudStorageExample”);
class CloudStorageApplication : public Application
{
public:
CloudStorageApplication ();
virtual ~CloudStorageApplication ();
void Setup (Ptr<Socket> socket, Address address, uint32_t packetSize, uint32_t nPackets, DataRate dataRate, std::string operation);
private:
virtual void StartApplication (void);
virtual void StopApplication (void);
void ScheduleTx (void);
void SendPacket (void);
Ptr<Socket> m_socket;
Address m_peer;
uint32_t m_packetSize;
uint32_t m_nPackets;
DataRate m_dataRate;
EventId m_sendEvent;
bool m_running;
uint32_t m_packetsSent;
std::string m_operation; // “upload” or “download”
};
CloudStorageApplication::CloudStorageApplication ()
: m_socket (0),
m_peer (),
m_packetSize (0),
m_nPackets (0),
m_dataRate (0),
m_sendEvent (),
m_running (false),
m_packetsSent (0),
m_operation (“upload”)
{
}
CloudStorageApplication::~CloudStorageApplication ()
{
m_socket = 0;
}
void
CloudStorageApplication::Setup (Ptr<Socket> socket, Address address, uint32_t packetSize, uint32_t nPackets, DataRate dataRate, std::string operation)
{
m_socket = socket;
m_peer = address;
m_packetSize = packetSize;
m_nPackets = nPackets;
m_dataRate = dataRate;
m_operation = operation;
}
void
CloudStorageApplication::StartApplication (void)
{
m_running = true;
m_packetsSent = 0;
m_socket->Bind ();
m_socket->Connect (m_peer);
SendPacket ();
}
void
CloudStorageApplication::StopApplication (void)
{
m_running = false;
if (m_sendEvent.IsRunning ())
{
Simulator::Cancel (m_sendEvent);
}
if (m_socket)
{
m_socket->Close ();
}
}
void
CloudStorageApplication::SendPacket (void)
{
Ptr<Packet> packet = Create<Packet> (m_packetSize);
m_socket->Send (packet);
if (++m_packetsSent < m_nPackets)
{
ScheduleTx ();
}
}
void
CloudStorageApplication::ScheduleTx (void)
{
if (m_running)
{
Time tNext (Seconds (m_packetSize * 8 / static_cast<double> (m_dataRate.GetBitRate ())));
m_sendEvent = Simulator::Schedule (tNext, &CloudStorageApplication::SendPacket, this);
}
}
int main (int argc, char *argv[])
{
CommandLine cmd;
cmd.Parse (argc, argv);
// Create nodes
NodeContainer nodes;
nodes.Create (6);
// Create point-to-point links
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“100Mbps”));
pointToPoint.SetChannelAttribute (“Delay”, StringValue (“1ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install (NodeContainer (nodes.Get (0), nodes.Get (1))));
devices.Add (pointToPoint.Install (NodeContainer (nodes.Get (1), nodes.Get (2))));
devices.Add (pointToPoint.Install (NodeContainer (nodes.Get (2), nodes.Get (3))));
devices.Add (pointToPoint.Install (NodeContainer (nodes.Get (3), nodes.Get (4))));
devices.Add (pointToPoint.Install (NodeContainer (nodes.Get (4), nodes.Get (5))));
// Install Internet stack
InternetStackHelper stack;
stack.Install (nodes);
// Assign IP addresses
Ipv4AddressHelper address;
address.SetBase (“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign (devices);
// Set up applications
uint16_t uploadPort = 6000;
uint16_t downloadPort = 7000;
// Server application on node 5
Address uploadServerAddress (InetSocketAddress (Ipv4Address::GetAny (), uploadPort));
Address downloadServerAddress (InetSocketAddress (Ipv4Address::GetAny (), downloadPort));
PacketSinkHelper uploadSinkHelper (“ns3::TcpSocketFactory”, uploadServerAddress);
PacketSinkHelper downloadSinkHelper (“ns3::TcpSocketFactory”, downloadServerAddress);
ApplicationContainer uploadSinkApps = uploadSinkHelper.Install (nodes.Get (5));
ApplicationContainer downloadSinkApps = downloadSinkHelper.Install (nodes.Get (5));
uploadSinkApps.Start (Seconds (1.0));
uploadSinkApps.Stop (Seconds (20.0));
downloadSinkApps.Start (Seconds (1.0));
downloadSinkApps.Stop (Seconds (20.0));
// Client application on node 0 (upload)
Ptr<Socket> uploadSource = Socket::CreateSocket (nodes.Get (0), TcpSocketFactory::GetTypeId ());
Address uploadRemoteAddress (InetSocketAddress (interfaces.GetAddress (5), uploadPort));
Ptr<CloudStorageApplication> uploadApp = CreateObject<CloudStorageApplication> ();
uploadApp->Setup (uploadSource, uploadRemoteAddress, 4096, 5000, DataRate (“50Mbps”), “upload”);
nodes.Get (0)->AddApplication (uploadApp);
uploadApp->SetStartTime (Seconds (2.0));
uploadApp->SetStopTime (Seconds (20.0));
// Client application on node 2 (download)
Ptr<Socket> downloadSource = Socket::CreateSocket (nodes.Get (2), TcpSocketFactory::GetTypeId ());
Address downloadRemoteAddress (InetSocketAddress (interfaces.GetAddress (5), downloadPort));
Ptr<CloudStorageApplication> downloadApp = CreateObject<CloudStorageApplication> ();
downloadApp->Setup (downloadSource, downloadRemoteAddress, 4096, 5000, DataRate (“50Mbps”), “download”);
nodes.Get (2)->AddApplication (downloadApp);
downloadApp->SetStartTime (Seconds (3.0));
downloadApp->SetStopTime (Seconds (20.0));
// Set up a second client to simulate more upload traffic
Ptr<Socket> uploadSource2 = Socket::CreateSocket (nodes.Get (1), TcpSocketFactory::GetTypeId ());
Ptr<CloudStorageApplication> uploadApp2 = CreateObject<CloudStorageApplication> ();
uploadApp2->Setup (uploadSource2, uploadRemoteAddress, 4096, 5000, DataRate (“50Mbps”), “upload”);
nodes.Get (1)->AddApplication (uploadApp2);
uploadApp2->SetStartTime (Seconds (4.0));
uploadApp2->SetStopTime (Seconds (20.0));
Simulator::Stop (Seconds (20.0));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
Step 4: Run the Simulation
Compile and run the simulation script:
sh
./waf configure
./waf build
./waf –run NetworkCloudStorageExample
Explanation
- Node Creation: Create nodes representing different devices in the network.
- Point-to-Point Links: Configure point-to-point links between nodes with high data rates and low latency to simulate a cloud storage environment.
- Internet Stack: Install the Internet stack on all nodes.
- IP Configuration: Assign IP addresses to the interfaces.
- Applications: Implement a custom application (CloudStorageApplication) that simulates cloud storage operations by sending packets over TCP. The application supports both upload and download operations.
- Traffic Generation: Use the custom application to generate upload and download traffic from client nodes to a server node, simulating cloud storage operations.
Advanced Cloud Storage Techniques
- Simulating Different File Sizes:
Adjust the packetSize and nPackets to simulate different file sizes.
uploadApp->Setup (uploadSource, uploadRemoteAddress, 8192, 10000, DataRate (“50Mbps”), “upload”);
- Quality of Service (QoS):
Implement QoS mechanisms to prioritize cloud storage traffic.
TrafficControlHelper tch;
tch.SetRootQueueDisc (“ns3::FqCoDelQueueDisc”);
tch.Install (devices);
- Monitoring Performance:
Use the FlowMonitor module to analyze the performance of cloud storage traffic.
FlowMonitorHelper flowmon;
Ptr<FlowMonitor> monitor = flowmon.InstallAll ();
// At the end of the simulation
monitor->SerializeToXmlFile (“cloud-storage-flowmon-results.xml”, true, true);
- Simulating Packet Loss and Delay:
Introduce packet loss and delay to simulate real-world network conditions.
Ptr<RateErrorModel> em = CreateObject<RateErrorModel> ();
em->SetAttribute (“ErrorRate”, DoubleValue (0.01)); // 1% packet loss
devices.Get (1)->SetReceiveErrorModel (em);
// Introduce delay
Config::SetDefault (“ns3::PointToPointChannel::Delay”, StringValue (“10ms”));
- Simulating Multiple Clients:
Add multiple client applications to simulate a more complex cloud storage environment.
Ptr<Socket> uploadSource3 = Socket::CreateSocket (nodes.Get (3), TcpSocketFactory::GetTypeId ());
Ptr<CloudStorageApplication> uploadApp3 = CreateObject<CloudStorageApplication> ();
uploadApp3->Setup (uploadSource3, uploadRemoteAddress, 4096, 5000, DataRate (“50Mbps”), “upload”);
nodes.Get (3)->AddApplication (uploadApp3);
uploadApp3->SetStartTime (Seconds (5.0));
uploadApp3->SetStopTime (Seconds (20.0));
At last, we all get to know how to implement network cloud storage in ns3. It involves data centers, client nodes, and servers to simulate the file storage and retrieval operations. We also have explained the different advanced cloud storage techniques for simulating the network.
Involve with our experts for assistance in your implementation of Network Cloud Storage within the ns3 program, as we provide you with a comparative analysis pertinent to your project.