virtual machine migration

[suresh moharana]

Sir,

I am new to cloudsim. How to implement virtual machine migration in cloudsim.
Do we need to create two separate host or datacenters for vm
migration. Do we need
to create a entirely new code or is it possible to modify an inbulid
code to implement the vm migration. Kindly help me sir.

[Rodrigo Calheiros]

Dear suresh,

Migration we implemented is only for migrations inside the same data
center. To implement migration across data centers, you have to:

1. Define message tags to be exchanged between data centers to start
and accept the migration;

2. extend data centers to allow them to send and receive such messages; and

3. use the existing methods for migration inside the data center to
stop cloudlets in one side and restart in the other side.

Regards,
Rodrigo

[suresh moharana]

Sir,

 

i also trying to migrate inside a datacenter between two host. Is there any inbulid class or method that I can use directly or I need to create a new class.What are the steps I will follow. If you will provide a sample code for VM migration within datacenter then it will be more helpful.

 

Thanking You

 

Suresh. 

[suresh moharana]

Sir,

I have created two hosts in a datacenter. I have also added a VM in one host and one cloudlet to the VM. I want to migrate the VM from the host having the VM to the other host. What are the steps i need to follow to migrate the VM and measure the total migration time for the VM migration. Plz help.

Suresh.

[Divya]

Anyone can send me vm migration code

[pallavi gupta]

vm migration code is already implemented in cloudsim........in power pacakage.

On Sat, May 18, 2013 at 1:24 AM, Divya <divya....@gmail.com> wrote:

Anyone can send me vm migration code

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[Tapender Singh Yadav]

Hello Suresh Sir,

                         I have been working on the VM Migration algorithm implementation in cloudsim. I wanted to know the steps to follow to migrate the VM from one host to another (similar to the question you asked about 3 years back). Your help in this regard will help me to move forward with my work.

Thanks & Regards,

Tapender Singh Yadav

[Muthu Shanmuga Kannan]

Sir,

I am new to clousim

can you please explain me how to initiate Vm migration inside datacenter by coding .

Please Help me sir. 

[Dixxy Vlad]

I don't know if you still want the answer, since it's two weeks ago.

But you can use VM_MIGRATE tag for migrating VMs within one datacenter

example of using is this,

sendNow(datacenterID, CloudSimTags.VM_MIGRATE, migrationData);

where migrationData is created like this,

HashMap<String, Object> migrationData = new HashMap<String, Object>();
migrationData.put("vm", vmlist.get(0)); //the object of the VM you want to migrate
migrationData.put("host", datacenter.getHostList().get(1)); //the host you want the VM to migrate in

And for some reasons, in my case, I have to comment out this line

host.removeMigratingInVm(vm);

in Datacenter.processVmMigrate(), or it will crash. (I have no idea why)


เมื่อ วันเสาร์ที่ 1 พฤศจิกายน ค.ศ. 2014, 14 นาฬิกา 7 นาที 22 วินาที UTC+7, Muthu Shanmuga Kannan เขียนว่า:

[Anthony H.]

Can you tell me the VM and Cloudlet Scheduler that you chose for the hosts and VMs ?

I managed to migrate one VM from an host to an another, but only with the CloudletSchedulerSpaceShared() scheduler and when the host has a VmSchedulerTimeShared scheduler.

Otherwise, it crashed. I think that the simulator deletes the VM twice with the other schedulers (it can explain why your comment resolves this problem... but it may not work for the other schedulers).

[Muhammad Yousaf]

Hi,

I am also trying vm migration simulations, however, when I run simulation with Power Datacenter, it goes in some infinite loop and simulation is never completed. It happens after following message:

"Trying sending Cloudlet # to Vm #".

Anthony, can you please share that how you managed to migrate the vm?

Thanks.

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[Dixxy Vlad]

Hello Anthony,

With my, code any scheduler is fine. I tried using all of the scheduler, both VM scheduler and Cloudlet scheduler.

Could you tell me where you insert the migration code (what method and class)?

About the commented line, I think the CloudSim's dev expect the users to call 

host.addMigratingInVm(vm);

before we start the migration for some kinds of temporary resource allocation issues.

So when the migration is almost finished, they call

host.removeMigratingInVm(vm);

to let the VmAllocationPolicy does its job.




เมื่อ วันอังคารที่ 18 พฤศจิกายน ค.ศ. 2014, 3 นาฬิกา 38 นาที 21 วินาที UTC+7, Anthony H. เขียนว่า:

[Anthony H.]

I did the same as Dixxy Vlad said. Create a class which extends the Datacenter class and you override de processOtherEvent() method. Nevertheless, my program goes also into an infinite loop if a extend PowerDatacenter instead of Datacenter...

So, I created a new class (DatacenterMigration) which extends the Datacenter class. I overrode the registerOtherEntity() method (which will be called at the end of startEntity() ) in order to trigger a migration event (maybe it is the problem ? Where did you put that trigger ?) : 

send(this.getId() , this.getInitMigrDelay(), INITIATE_VM_MIGRATION); // INITIATE_VM_MIGRATION is my user tag - it will be recognized in processOtherEvent()

When the entity (itself) will receive the event notification in processOtherEvent(), it will do the same as you wrote before (create a Map and send the MV_MIGRATE event).

The rest of my program is based on the example 8, but here I create only two hosts within the same DatacenterMigration, with one VM that I want to move to an another Host. But I have problems with some schedulers ...

Did you proceed differently ?

[Dixxy Vlad]

Hello Anthony,

The way you initiate the migration may be the problem. I found out that the VMs will be ready to be used (created and allocated to its host) after all entity (datacenter, broker) is started.

So you have to initiate the migration when the VMs are ready, and of course, before all the cloudlet is done sending (CloudSim will be shutdown if there's no cloudlet left for sending).

I don't know where is the proper place to insert the code, but I insert it in the DatacenterBroker.processVmCreate() where Cloudsim starts submitting cloudlets right after all VM is done creating.

To be specific, I insert it at

if (getVmsCreatedList().size() == getVmList().size() - getVmsDestroyed()) {
   sendNow(srcDatacenterID, CloudSimTags.START_VM_MIRGRATE, data) //Initiate the migration here

   submitCloudlets();

}

Note that my research is about migrating VMs across two datacenters, so the objects like cloudlets is not in my interest.

You may need to do it in different way.

เมื่อ วันพุธที่ 19 พฤศจิกายน ค.ศ. 2014, 16 นาฬิกา 50 นาที 47 วินาที UTC+7, Anthony H. เขียนว่า:

[Anthony H.]

It seems weird to me to put this code there. Nevertheless, I tried your solution : it has the same behavior as before, it only works for some specific scheduler...

[Giridharan Venugopal]

hey hi,

I'm trying VM migration in cloudsim example 3, where there're 2 hosts in 1 datacenter. I'm trying to migrate the VM from host 1 to host 0. I've tried inserting your code in datacenterbroker.java class, but migration is not happening.

Can you please tell me how to perform VM migration for the above case.

Thanks,

Giridharan

[Dixxy Vlad]

Hi Giridharan,

My code posted earlier is for doing the cross-datacenter migration, in case of migrating within the same datacetner CloudSim has already had a function for it.

In class "org.cloudbus.cloudsim.Datacenter" in the 493th line:

protected void processVmMigrate(SimEvent ev, boolean ack) {...}

And there's the example of function using in class "org.cloudbus.cloudsim.power.PowerDatacenterNonPowerAware" in the 167th line:

send(getId(),
   vm.getRam() / ((double) vm.getBw() / 8000) + 10,

   CloudSimTags.VM_MIGRATE,

   migrate);

Also, there's similar code in "org.cloudbus.cloudsim.power.PowerDatacenter" in 87th line too:

protected void updateCloudletProcessing() {...}

You can either adapt the code in this power datacenter for a direct use (initiating a power datacenter is a bit complicated, at least in my thought), or you can insert these code into the default datacenter. Be sure that the code you insert will be called when you execute the program.

Hope this will help,
Vlad

[Giridharan Venugopal]

Thanks Vlad.

It'd be of great help if you could tell me how to call the processVmMigrate(SimEvent ev, boolean ack) method in the datacenter class from cloudsim3 example.

What should be passed as arguments?

Thanks,

Giridharan

[Dixxy Vlad]

Hi Giridharan,

1.) about calling function

protected void processVmMigrate(SimEvent ev, boolean ack) {...}

You need not to call it directly. You can just use a CloudSim's static function "send" or "sendNow" and leave the rest jobs to CloudSim, you have to specify the time to do the event for the former and have not to specify for the latter.

And the example of using those two function is existed in "org.cloudbus.cloudsim.power.PowerDatacenterNonPowerAware" in the 167th line:

send(getId(),
   vm.getRam() / ((double) vm.getBw() / 8000) + 10,

  CloudSimTags.VM_MIGRATE,

  migrate);

As you can see, it need 4 args. 

1.1) The destination of the migration, simply the id of the datacenter containing the VM being migrated itself since you want to migrate within one datacenter. 

1.2) The delay of the event, i.e., the second counted from now to start the event you want. 

1.3) The tag used by destination of "send" to specify which type of event is this, of course, you  have to use "CloudSimTags.VM_MIGRATE"

1.4) The data object for being used in the event

For 

protected void processVmMigrate(SimEvent ev, boolean ack) {...}

the object in 1.4) has to be the type "Map<String, Object>" with two keys in it, "vm" and "host" which the former is the VM being migrated and the latter is the destination host of the migration. You have to specify those yourselves.

2.) Where to call "send"?

The problem is , as far as I know, you cannot just simply call it in your main class since CloudSim will be terminated if all cloudlet has been sent (i.e., no cloudlet left).

So if you call "send" like this in your main class (CloudSimExample3)

CloudSim.startSimulation();

   send(dest, delay, CloudSimTags.VM_MIGRATE, data);

CloudSim.stopSimulation();

your program will be crashed, "send" will not be able to find the destination because all entity, such as datacenters, is terminated (no cloudlet left before executing "send" function).

You have to find the other place to call "send" where it is executed by CloudSim before there is no cloudlet left.
For me, I insert the code at DatacenterBroker.processVmCreate()

if (getVmsCreatedList().size() == getVmList().size() - getVmsDestroyed()) {

   send(destDatacenterID, delay, CloudSimTags.VM_MIRGRATE, data) //Initiate the migration here

   submitCloudlets();

}

In this way, "send" will be called right after every VM is created and allocated to hosts (does not start sending cloudlets yet).

I don't know if this is the appropriate way to do it, but it does a trick for me.

Hope this will help,

Vlad

[Giridharan Venugopal]

Thank you so much Vlad.

As I've said earlier, I'm trying to migrate a VM in host 2 to host 1 in a single datacenter, by modifying example 3. This should be simple, right?

But no matter where I insert the code snippet, migration doesn't seem to be happening. I tried inserting it in the main method, then in the datacenterbroker class, and then in datacenter class. But no luck.

Can you please help?

Thanks,

Giridharan

[Dixxy Vlad]

Hi Giridharan,

Do you use JAR file of CloudSim? If yes, you have to build the JAR file first or the modified code won't affect. There's a "build.xml" tag along with CloudSim complete package as you can see in the picture.

And you can read its usage in "readme.txt".

But if you use CloudSim's source code directly, I have no idea.

Regards,

Vlad

[Giridharan Venugopal]

Thanks a lot Vlad. I tried building the jar file, but still no luck. 

Can't we initiate a migration from the main method? I mean how do we tell the program that I'm trying to initiate a migration?

a) We're creating cloudlets b) Then we create VMs c) Then we bind the cloudlets to VMs d) Then we create hosts and datacenters.

Once the VMs are placed in the hosts, i want to migrate the VMs from 1 host to another.

Why can't I insert this block in main method?

HashMap<String, Object> migrationData = new HashMap<String, Object>();

migrationData.put("vm", vmlist.get(1)); //the object of the VM you want to migrate

migrationData.put("host", 0); //the host you want the VM to migrate in

send(datacenterId,(vm1.getRam() / ((double) vm1.getBw() / 8000) + 10),CloudSimTags.VM_MIGRATE,migrationData);

If it cannot be called from main method, should I have to place these lines in Datacenter.java class or DatacenterBroker.java class?

Regards,

Giridharan

[Dixxy Vlad]

Like I posted earlier, CloudSim will be terminated if no cloudlet left to be sent.
To be more specific, if you call a line

CloudSim.startSimulation();

CloudSim will do jobs (send cloudlets) until nothing left and shutdown itself. Yes, it shuts itself down when all cloudlet done sending EVEN IF the line

CloudSim.stopSimulation();

has not been executed yet.

Therefore, putting the migration code between those 2 lines has no meaning since all cloudlet might be done sending before the migration code is called. If you have such a luck the migration code may be called right before all cloudlet done sending, but luck is not an option in the programs, right?. So, you have to find another place that will be called before it starts sending the cloudlets.

DatacenterBroker (the line I told you in earlier post) is perfectly fit to put the migration code for my project because it will be called right after ALL vm is allocated into hosts. If you have no problem with this way to call the migration, I recommend it.

For Datacenter, it's not appropriate to call the migration in this object because it does not know exactly when all vm is already allocated into its hosts. By the way, I'm not sure about this, you can check the flow of CloudSim by debugging the line "CloudSim.startSimulation();" to see if Datacenter knows when all vm is ready or not.

Regards,
Vlad

[Dixxy Vlad]

Oh, and you can just inherit class DatacenterBroker and override its method to modify the code instead of modifying the original one. This way will need not to build the CloudSim's JAR file.

[Giridharan Venugopal]

Thanks Vlad. One more silly doubt. Below are the properties of the cloudlets. If I want to increase the load, which of the below parameters should I have to increase?

long length = 1000;

long fileSize = 300;

long outputSize = 300;

int pesNumber = 1;

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[Amir Borhani]

Hi Giridharan,
The cloudlet load equals (length * pesNumber) with the unit known as MI (Million Instruction). Therefore, In your example the cloudlet has 1000 MI load.
if you bind it to a Vm with 1 core and Mips=500, your cloudlet will be finished in 2 seconds.


I hope that helps you.
Amir

[Mrugesh Master]

Hello everyone,

I've created migration map. Also made necessary changes required to perform the migration inside updateCloudletProcessing() method of Datacenter.java file. The simulator performs the pre-defined part of the method but skips the code I've inserted for the migration. 

Do i need to make any other changes ?

Thank you

[soumya grampurohit]

Respected,

we are trying to migrate virtual machine from one host to another host in same datacenter using cloudsim 3 example.

we are getting error in datacenterbroker line 222.it is as 

 int[]  data= (int[]) ev.getdata();

processvmcreate(simevent ev)

 in this method the above line is used.

As your reply given on this same issue

i.e using 

send(destdatacenterid,0,cloudsimTags,data);

placing it in 

if(getVmscreationlist().size() ==getvmlist().size() - getvmsdestroyed())

{send(destdatacenterid,0,cloudsimTags,data);

submitcloudlets();

}

the sending data in the send line is in the form of int[] 

how to convert it to HashMap<string,object> 

we are getting error there .

please do help its very urgent ....

[Atyaf]

Hello

for load balancing based task how can I CALCULATE the load on  each vm how I startT  AND IF I use bee colony algorithm for scheduling where use or write it

pls can anyone help

Thank you

[Meenakshi Dahiya]

Hey vlad I want to do Task Migration, will it be done using the same procedure which is used for the VM migration or some other procedure is need to be follow? Please help me.

[Dixxy Vlad]

Hi Dahiya,

CloudSim has a variable names "cloudlets" that represents the data or tasks for VM to process. It also already has had the examples for cloudlet migration (not sure which example, and of course, it is the migration within the same data center). I am not sure if that variable will satisfy your objective. 

You may use what CloudSim provides or just inherit CloudSim's classes, define some other variables and create your own functions to do your jobs. Hope this will help :). 

[Dixxy Vlad]

Dear Grampurohit,

Don't know if you still want this help. 

HashMap hashData = new HashMap<String, Object>{"dataName",data};

The code above would satisfy your need (probably with a little better syntax). It simply just has to initialize the HashMap object and put "data" within it. Please note that "dataName" can be anything in the String form since it will be used to retrieve the "data" when you want to read this HashMap with hash name (it is not necessary if you have only one data within this HashMap).

[Hetal Bhadja]

On Friday, February 25, 2011 at 4:06:20 AM UTC+5:30, Rodrigo Calheiros wrote:

Dear suresh,

Migration we implemented is only for migrations inside the same data
center. To implement migration across data centers, you have to:

1. Define message tags to be exchanged between data centers to start
and accept the migration;

2. extend data centers to allow them to send and receive such messages; and

3. use the existing methods for migration inside the data center to
stop cloudlets in one side and restart in the other side.

Regards,
Rodrigo

[Binal Parekh]

how to migrate vm from one host to another ?

plz help me 

[Manoel Campos]

You can start by studying the PowerVmAllocationPolicyMigrationStaticThreshold class.

It extends (not directly) the VmAllocationPolicy class. When you create a datacenter,  you have

to inform what VmAllocationPolicy will be used to place VM. Using the PowerVmAllocationPolicyMigrationStaticThreshold, for instance, it will perform VM migrations based on CPU utilisation threshold of hosts.

But it is supposed to use this class with PowerDatacenter, PowerHost and PowerVm classes instead of the traditional ones.

You can see a complete examples in the package org.cloudbus.cloudsim.examples.power.planetlab. There are lots of examples using this policy, for instance the ThrMc one.

Manoel Campos da Silva Filho Professor and Software Engineer
manoel...@gmail.com | www.manoelcampos.com

Professor at Federal Institute of Education, Science and Technology of Tocantins - Brazil
Computer Science and Engineering PhD Student at University of Beira Interior - Portugal

 about.me

On Mon, Mar 14, 2016 at 2:34 PM, Binal Parekh <binalp...@gmail.com> wrote:

how to migrate vm from one host to another ?

plz help me 

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[Binal Parekh]

thank you sir

i did the migration but after migration there is no change in host utilization and no change in power. i destroyed vms from the old host but old host utilization is still same no change 

so whats problem there ? why i get same utilization and power after migration ??

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Thank you  

Binal Parekh

[Manoel Campos]

See the previous message I just posted. I included a simple example to perform VM migration.

You can study the example to try figure out what is wrong with your code.

After that, if you cannot find out the problem, I may try to help you.

Manoel Campos da Silva Filho Software Engineer

Computer Science and Engineering PhD Student at University of Beira Interior (Portugal)

Professor at Federal Institute of Education, Science and Technology of Tocantins (Brazil)

http://manoelcampos.com

 about.me

[Muhammad Zakarya]

see my recent post

[Binal Parekh]

sorry sir where you posted message related to VM migration?

[Manoel Campos]

You have to search in the forum for "VM migration" or "virtual machine migration". You can also filter for posts started by me.

Manoel Campos da Silva Filho Software Engineer

Computer Science and Engineering PhD Student at University of Beira Interior (Portugal)

Professor at Federal Institute of Education, Science and Technology of Tocantins (Brazil)

http://manoelcampos.com

 about.me

[samar e]

plz Dr Manoel Campos where's the example which perform VM migration.

i can't found it

[gopi krishnan]

Hi Giridharan

      I am new to  cloudsim and the clousim group. I am doing my research in VM migration using cloudsim and as per the previous conversations in this group I can see that you tried with CloudExample3 (for VM migration). When I tried to do the same  process using CloudExample3 in cloudsim for verification (I followed the same instructions as mentioned in this group) , I got stuck a little bit in the step after the  insertion of  'Send' [send(destDatacenterID, delay, CloudSimTags.VM_MIRGRATE, data)] command in DatacenterBroker.processVmCreate() method. Please help me how to call this method in Main program (Example3)...??

       Awaiting for your reply...

Thanks,

Gopi

[samar e]

i have same problem with (send )
and i need to migrate vm with pre-copy and post copy 

can any one help me plz 

[gopi krishnan]

Hi Samar

      Did you try to implement the changes using pre-copy/post-copy migration approach in cloudsim before?? Because I need to migrate VM using pre-copy approach in cloudsim and it will be very helpful for me to proceed further. 

Thanks 

[Simar Preet Singh]

Hi All,

Anyone has the final code of migrating vm with pre-copy and post copy from one host to another?

can any one help me in this.

Thanks,

Simar Preet

09815816740 

[Amir Borhani]

The general form of precopy migration is already implemented. Do you need to implement the actual precopy mechanism including dirty page etc?

Regards
Amir

Sent from BlueMail

On Jan 12, 2017, at 3:08 PM, Simar Preet Singh <er.simarp...@gmail.com> wrote:

Hi All,

Anyone has the final code of migrating vm with  pre-copy and  post copy from one host to another?

can any one help me in this.

Thanks,

Simar Preet

09815816740 

On Sunday, November 6, 2016 at 8:28:24 PM UTC+5:30, gopi krishnan wrote:

Hi Samar

      Did you try to implement the changes using pre-copy/post-copy migration approach in cloudsim before?? Because I need to migrate VM using pre-copy approach in cloudsim and it will be very helpful for me to proceed further. 

Thanks 

On Thursday, November 3, 2016 at 7:33:38 PM UTC, samar e wrote:

i have same problem with (send )
and i need to migrate vm with pre-copy and post copy 

can any one help me plz 

On Thursday, November 3, 2016 at 1:56:41 PM UTC+2, gopi krishnan wrote:

Hi Giridharan

      I am new to  cloudsim and the clousim group. I am doing my research in VM migration using cloudsim and as per the previous conversations in this group I can see that you tried with CloudExample3 (for VM migration). When I tried to do the same  process using CloudExample3 in cloudsim for verification (I followed the same instructions as mentioned in this group) , I got stuck a little bit in the step after the  insertion of  'Send' [ send(destDatacenterID, delay, CloudSimTags.VM_MIRGRATE, data)] command in DatacenterBroker. processVmCreate() method. Please help me how to call this method in Main program (Example3)...??

For 

protected void processVmMigrate ( SimEvent ev , boolean ack ) {...}

In class "org.cloudbus.cloudsim. Datacenter" in the 493th line:

protected void processVmMigrate(SimEvent ev, boolean ack) {...}

And there's the example of function using in class "org.cloudbus.cloudsim.power. PowerDatacenterNonPowerAware" in the 167th line:

send( getId(),
   vm.getRam() / ((double) vm.getBw() / 8000) + 10,

   CloudSimTags.VM_MIGRATE,

   migrate);

Also, there's similar code in "org.cloudbus.cloudsim.power. PowerDatacenter" in 87th line too:

protected void updateCloudletProcessing() {...}

You can either adapt the code in this power datacenter for a direct use (initiating a power datacenter is a bit complicated, at least in my thought), or you can insert these code into the default datacenter. Be sure that the code you insert will be called when you execute the program.

Hope this will help,
Vlad

On Monday, June 1, 2015 at 5:58:09 PM UTC+7, Giridharan Venugopal wrote:

hey hi,

I'm trying VM migration in cloudsim example 3, where there're 2 hosts in 1 datacenter. I'm trying to migrate the VM from host 1 to host 0. I've tried inserting your code in datacenterbroker.java class, but migration is not happening.

Can you please tell me how to perform VM migration for the above case.

Thanks,

Giridharan

On Saturday, 15 November 2014 16:30:06 UTC+8, Dixxy Vlad wrote:

I don't know if you still want the answer, since it's two weeks ago.

But you can use VM_MIGRATE tag for migrating VMs within one datacenter

example of using is this,

sendNow ( datacenterID , CloudSimTags . VM_MIGRATE , migrationData );

where migrationData is created like this,

HashMap < String , Object > migrationData = new HashMap < String , Object >();
migrationData . put ( "vm" , vmlist . get ( 0 )); //the object of the VM you want to migrate
migrationData . put ( "host" , datacenter . getHostList (). get ( 1 )); //the host you want the VM to migrate in

And for some reasons, in my case, I have to comment out this line

host . removeMigratingInVm ( vm );

in Datacenter.processVmMigrate(), or it will crash. (I have no idea why)


เมื่อ วันเสาร์ที่ 1 พฤศจิกายน ค.ศ. 2014, 14 นาฬิกา 7 นาที 22 วินาที UTC+7, Muthu Shanmuga Kannan เขียนว่า:

Sir,

I am new to clousim

can you please explain me how to initiate Vm migration inside datacenter by coding .

Please Help me sir. 

On Thursday, February 24, 2011 3:31:39 PM UTC+5:30, suresh moharana wrote:

Sir,

I am new to cloudsim. How to implement virtual machine migration in cloudsim.
Do we need to create two separate host or datacenters for vm
migration. Do we need
to create a entirely new code or is it possible to modify an inbulid
code to implement the vm migration. Kindly help me sir.

--

[aya.a...@gmail.com]

Hello all

 can anyone help me please, I'm trying VM  migration in cloudsim example 8,where there're 3 hosts in 1 datacenter ,I implemented the algorithm in a class  which is extended from 

VmAllocationPolicySimple class.  

my problem is when I run the code the  data center is starting and  the broker is starting then it fails in creating the VMs.    

[aaina arora]

Hey!

Can you tell me how to implement vm migration in workflow sim?

[muzzamm...@gmail.com]

hi, suresh, please how can I migrate cloudlet from one VM to another Vm in cloudsim

thank you

On Tuesday, March 1, 2011 at 11:08:01 AM UTC+8, suresh moharana wrote:

Sir,

I have created two hosts in a datacenter. I have also added a VM in one host and one cloudlet to the VM. I want to migrate the VM from the host having the VM to the other host. What are the steps i need to follow to migrate the VM and measure the total migration time for the VM migration. Plz help.

Suresh.

[Mohammed Alanzy]

I think you have to make your simulation run based on a period of time then every several mins you should check the utilization for the VMs then you select a specific cloudlet to migrate it, 

you can see the examples in the power or PlanetLab packages, it may help if you follow the same process 

Yours faithfully,

M. Alanzy 

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[Muzzammil Mansur]

Thank you for the information.

Really appreciate it

[Saira Manzoor]

sir could u please specify example name  in  PlanetLab ?

thanks 

[Mohammed Alanzy]

for instance "IqrMmt" the 3rd example which implementing minimum migration time 

class "PowerVmAllocationPolicyMigrationAbstract" in the sources>power

Class "HostDynamicWorkload " in source/cloudsim/HostDynamicWorkload.java

you can see them and try to understand the concepts 

Yours faithfully,

M. Alanzy 

[Saira Manzoor]

sir is it task migration example or VM migration example?

[Mohammed Alanzy]

VM migration example

read the previous emails, I told him/her to see the structure of migration, as far as I know, there's no "task migration" example in cloudsim

Thanks

M. Alanzy 

[Saira Manzoor]

yup, that's wt I was asking. 

thanks