CloudSim is a framework for modeling and simulation of Cloud Computing Infrastructures and Services.
Questions tagged [cloudsim]
94 questions
0
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how does (int)exp.sample() work in the code?
ExponentialDistribution exp = new ExponentialDistribution(4.0);
for(int i = 1; i < 20; i++){
timestamp[i] = (int)exp.sample() + 1+timestamp[i-1];
Here timestamp is an array of integers and a random value is assigned to it with…
Sarabjeet Singh
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1 answer
how to change scheduling policy in cloudsim?
I want to change the default scheduling policy of cloudsim which is FCFS. To update the default policy, i need to make changes in submitCloudlets() method of DatacenterBroker class or also need to update few other methods ??
geeky
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cloudsim: How to compile source classes?
how i should compile and build classes of the sources folder!! (example datacenter.java or cloudlet.java .... )
To test ANT, I just extracted cloudsim from .zip and try to build without making any changes in any file.
I followed the instructions of…
geeky
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1 answer
CloudSim: need way to introduce performance degradation in VMs at certain simulation time
In Cloudsim, I need to introduce SLA violation at a particular time of the simulation e.g. from 600 to 1200 and from 2400 to 4000 (just an example). Such SLA violation needs to show a shortfall of mips from 600-1200 and 2400-4000 simulation times so…
Minhaz Chowdhury
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1 answer
Cloudsim: Update VM
I am working on an algorithm to select the VM for deploying the Cloudlet(task).
Now, I need to update the VM's current allocated ram whenever a cloudlet finished it's execution.
I don't know where I need to do this.
I tried this in…
Gokul
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java profiling for cloudsim
I am simulating a very large trace file from Google data using CloudSim. The simulations takes very very long time to complete (Simulating one day data needs 2 days to complete and simulation 3 days data takes more than 15 days). I profiled my code…
Muhammad Zakarya
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1 answer
CloudSim: Adding components
All!
Now, I'm designing a cloud storage simulation using CloudSim, but wondering that CloudSim provides a function to write data on a physical disk. If not, where do I add the component?
Sangmun Kim
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1 answer
CloudSim: Monitoring Vm Cpu Utilization and BW Utilization in constant intervals
In CloudSim package, I want to monitor Cpu utilization and bandwidth utilization of each vm in constant intervals (for example every 5 min) when vms are running cloudlets.
How can I do it?
Thanks
M_R
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1 answer
Cloudsim Physical Machine Creation
Is it possible to create a new physical machine in the VmAllocationPolicy file? Usually it is done while creating datacenter.But i wanted to add one during VM Allocation if none of the existing Physical machine can accommodate the VM.
user3753682
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-1
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1 answer
How can I fix the following problem regarding the variable?
I have a class and inside it there is a baseDir variable which has been defined as follows:
public class experiment {
for (int exp = 0; exp < experimentCnt; exp++) {
String dirString = config.getClass().getSimpleName() + "_" +…
Hami
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-1
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1 answer
How to fix - Exception in thread "main" java.lang.NullPointerException - in Eclipse
I wanted to create Cloudsim simulation in Eclipse IDE. I have make sure there is no significant error that should gives problem to the program. But when I run the program, this issue appear.
Exception in thread "main"…
Akura Ega Shiro
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-1
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1 answer
Elasticity with cloudsim
I'm working on a task scheduling method for cloud computing, the problem is l wanna create VMs during the run time in order to have elasticity and decrease the task rejection rate, but I dont know how to do this and where should I put the code for…
-1
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1 answer
How to implement retry FTT in cloudsim using No optimization algorithm?
Please help me in modifying algorithm for retry? is this algorithm makes sense ? Is it ok our need changes ? plz guide ?
Fahad Khan
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1 answer
CloudReports (Cloudsim Extension) on Cloudlet migrations gives error Null Exception
I'm Kind new in Cloudsim and CloudReports Extension so i don't know why
when running the CloudReports simulator it gives this Error:
nullpointerexception at org.cloudbus.cloudsim.power.powerdatacenter.processcloudletsubmit(powerdatacenter.java:269)…
appy
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-1
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1 answer
how to call optimizeAllocation to migrate vms in cloudsim
i m working on cloudsim to implement an genetic algorithm to find the optimal placement of vms in hosts.
in the begening i need to put vms randomly ( i created a class that extends from VmAllocationPolicy )
then i need to optimize vm allocation by…
Imed Eddine BOUDRAA
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