Rendition for Find Available Resources in Each Host
Description: In CloudSim, finding the available resources for each host involves checking the current usage of various resources such as CPU, RAM, bandwidth, and storage. CloudSim provides methods to retrieve the resources from each host, but you need to track the resource usage as well, because the available resources are the difference between total resources and the resources that are currently being utilized.
Sample Code
import org.cloudbus.cloudsim.*;
import org.cloudbus.cloudsim.provisioners.*;
import java.util.*;
import org.cloudbus.cloudsim.core.CloudSim;
public class MultipleHostsWithDifferentMips {
public static void main(String[] args) {
try {
// Initialize CloudSim
int numUsers = 1; // Number of cloud users
Calendar calendar = Calendar.getInstance();
boolean traceFlag = false; // trace events
CloudSim.init(numUsers, calendar, traceFlag);
// Create a list to hold all hosts
List hostList = new ArrayList<>();
// Define MIPS values for each host
int[] mipsValues = {1000, 2000, 1500}; // Different MIPS values for each host
// Create 3 hosts with different MIPS values
for (int hostId = 0; hostId < 3; hostId++) {
List peList = new ArrayList<>();
// Create PEs with different MIPS values for each host
PeProvisioner peProvisioner = new PeProvisionerSimple(mipsValues[hostId]);
Pe pe = new Pe(0, peProvisioner); // Add a single PE for each host with corresponding MIPS value
peList.add(pe);
// Create a Host with the PE list and other resources
Host host = new Host(
hostId,
new RamProvisionerSimple(8192), // 8 GB RAM
new BwProvisionerSimple(10000), // 10 GB Bandwidth
1000000, // 1 TB Storage
peList, // List of PEs
new VmSchedulerTimeShared(peList) // VM Scheduler
);
hostList.add(host);
}
// Create Datacenter with the list of hosts
DatacenterCharacteristics characteristics = new DatacenterCharacteristics(
"x86", "Linux", "Xen", hostList, 10.0, 3.0, 0.05, 0.001, 0.0);
Datacenter datacenter = new Datacenter("Datacenter_1", characteristics,
new VmAllocationPolicySimple(hostList), new LinkedList<>(), 0);
// Print out the details of each host
for (Host host : hostList) {
System.out.println("Host ID: " + host.getId());
for (Pe pe : host.getPeList()) {
System.out.println(" PE MIPS: " + pe.getMips());
}
System.out.println(" Total RAM: " + host.getRam());
System.out.println(" Total Bandwidth: " + host.getBw());
System.out.println(" Total Storage: " + host.getStorage());
System.out.println("-------------------------------------------------");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
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