gridsim-users — For general queries and feedbacks

[GridSim-users] regarding grid simulation

[sekhar c. <sek...@gm...>]

Dear all
Iam chandra sekhar learing grid computing and  Iam getting
confusion over executing of  GridSim.startGridSimulation();

especially this part of the execution of simsystem.java


public static void run() {
    run_initialise();
    while (incomplete) {
      if (!running) run_start();
      while (check_conditions()) {
        if (run_tick()) {
          break;
        }
      }
      tidy_up_stats();
      apply_variance_reduction();
      end_current_run();
    }
    run_stop();
    generate_report();
    generate_graphs();
  }
please explain breif description of the above code


and how resources are mapped with gridlets in that simulation

Re: [GridSim-users] Contents of Gridsim-users digest

[rajni a. <raj...@gm...>]

On 8/4/10, gri...@li... <
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-- 
Rajni

[GridSim-users] Fwd: Welcome to the "Gridsim-users" mailing list (Digest mode)

[rajni a. <raj...@gm...>]

---------- Forwarded message ----------
From: gri...@li... <
gri...@li...>
Date: Aug 4, 2010 6:59 AM
Subject: Welcome to the "Gridsim-users" mailing list (Digest mode)
To: raj...@gm...

Welcome to the Gri...@li... mailing list!

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-- 
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[GridSim-users] (no subject)

[bala m. <mur...@gm...>]

[GridSim-users] (no subject)

[saju r. <saj...@ya...>]

whether it is possible to analysis errors in gridsim. when the errors are 
generated.
please help

saju

[GridSim-users] resource management algorithm simulation

[NAVEEN K. <nav...@gm...>]

I want to simulate economic based resource management algorithm for
grid computing. Is it possible with gridsim? If possible, please guide
me, i am first time working with gridsim.

Thanks in advance

[GridSim-users] add to post

[NAVEEN K. <nav...@gm...>]

[GridSim-users] add to post

[NAVEEN K. <nav...@gm...>]

[GridSim-users] On Gridsim regarding resource discovery

[Keano.Ppy <kea...@gm...>]

Dear developers and friends,

Being an undergrad student,I'm very new to grid sim and grid computing.
After several readings on gridsim, I do have several big questions I need to
resolve.
This is my understanding of what gridsim is:
"A tool to simulate grid environment"
But, indeed, this definition is very vague to me. I've ran the samples from
gridsim v5, i can see PEs, machines..etc.
Can i say the word simulate above is to state on how components in the
grid/(s) interact with each other?
Even so, how can i analyze a resource discovery method to a grid environment
generated by gridsim?

Your help would be very much appreciated, as i don't really have a solid
tutor regarding grid computing for now.

Thanks and regards.

[GridSim-users] OutOfMemory problem in ResFailure Example03

[Agnieszka Z. <agn...@gm...>]

Hello,

I experience problems running Example 03 of the Resource Failure package. I
run my symulation on 4GB RAM server and occasionally get the 'OutOfMemory
Java heap space' error. The situation gets worse (most or all of the
simulations terminated without success) when I try to increase the number of
gridlets/users in the simulation.  I would like to simulate a custom network
with larger number of gridlets but I could not find solution to this
problem. Could You please help?

The log :

Ex03_User_16: Receiving Gridlet #3 with status Success at time =
1561.3607151999936 from resource Ex03_Res_6
Ex03_User_16: Receiving Gridlet #4 with status Success at time =
1562.030715199993 from resource Ex03_Res_6
Exception in thread "Ex03_Res_6_SpaceShared" java.lang.OutOfMemoryError:
Java heap space
        at java.util.Arrays.copyOf(Unknown Source)
        at java.lang.AbstractStringBuilder.expandCapacity(Unknown Source)
        at java.lang.AbstractStringBuilder.append(Unknown Source)
        at java.lang.StringBuffer.append(Unknown Source)
        at gridsim.Gridlet.write(Unknown Source)
        at gridsim.Gridlet.setGridletStatus(Unknown Source)
        at gridsim.ResGridlet.setGridletStatus(Unknown Source)
        at gridsim.resFailure.SpaceSharedWithFailure.gridletFinish(Unknown
Source)
        at
gridsim.resFailure.SpaceSharedWithFailure.checkGridletCompletion(Unknown
Source)
        at gridsim.resFailure.SpaceSharedWithFailure.body(Unknown Source)
        at eduni.simjava.Sim_entity.run(Sim_entity.java:605)

Thank You,
Best regards,
Agnieszka Zyguła

[GridSim-users] GridSim or another tool

[s g. <gha...@gm...>]

I'm going to implement my algorithm on a grid simulation tool such as
GridSim, but i really some help to know how to do this.
my algorithm tries to deliver a multimedia file to a demander through some
nodes of grid which contains the file. the nodes calculate some bandwidth
according to some factors, ...
I don't know if Gridsim can do this for me or not? if so how can I
 learn to do this and if not which grid tool is suitable?

I am waiting to get a guid from you.
thanks a lot.
Regards
           sara Ghasemi

[GridSim-users] Help

[said el-z. <elz...@ya...>]

Hi 
 
I'm new user to GRIDSIM. I started to compile example 1. I got three errors.  These errors as follows:
 
D:\Research\Grid_Software_Alea2\gridsim-toolkit\gridsim\examples\gridsim\example01\Example1.java:154: '(' or '[' expected
        LinkedList<Integer> Weekends = new LinkedList<Integer>();
                                                     ^
D:\Research\Grid_Software_Alea2\gridsim-toolkit\gridsim\examples\gridsim\example01\Example1.java:159: '(' or '[' expected
        LinkedList<Integer> Holidays = new LinkedList<Integer>();
                                                     ^
D:\Research\Grid_Software_Alea2\gridsim-toolkit\gridsim\examples\gridsim\example01\Example1.java:93: cannot access gridsim.GridResource
bad class file: C:\j2sdk1.4.1\jre\lib\ext\gridsim.jar(gridsim/GridResource.class)
class file has wrong version 50.0, should be 48.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
    private static GridResource createGridResource()
                   ^
3 errors
Process completed.

Please help me.
 
Regards









--- On Thu, 4/29/10, ye <hua...@gm...> wrote:


From: ye <hua...@gm...>
Subject: Re: [GridSim-users] [GridSim-developers] Regarding GridSim, Alea and MaGate
To: "Mayuri Mehta" <may...@gm...>
Cc: gri...@li..., gri...@li...
Date: Thursday, April 29, 2010, 10:12 AM


Hi Mayuri,

GridSim is of course good to start from scratch to implement your own ecosystem. Alea is based on GridSim and provides a lot of instant available features, such as a centralized meta-scheduler(high-level scheduler), processing capability of multi-CPU request jobs, etc. MaGate is also established on GridSim but work in a different direction. MaGate is using a self-structure P2P approach as its Information System and every node has its own high-level scheduler therefore no centralized point exist in the system. Meanwhile, MaGate integrates a simplified community aware scheduling protocol focus on reactive & dynamic scheduling (the protocol is accepted by IEEE AINA 2010 and IEEE ICDCS 2010, I hope an available version can be accessed soon). However, the MaGate is an ongoing work. The current available version from the website is a little old. If everything is fine, a new version is supposed to be published in May during a workshop in UK.

Cheers, 

Ye


On Thu, Apr 29, 2010 at 8:47 AM, Mayuri Mehta <may...@gm...> wrote:

Hi friends,
I decided to use Gridsim for *evaluating the performance of Dynamic Load
Balancing Algorithm in Distributed Systems *though it seems tough to do the
same because i have to incorporate new dynamic strategy in gridsim.
Meanwhile i came to know about Alea and Magate simulators which i feel will
be better for my purpose. At present all simulators are new for me.

If anybody is aware of all these simulators, then kindly guide me which one
will be best suitable for my purpose and easy to use. Help will be
appreciated.

Thanks.

Mayuri Mehta
Research Scholar
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[GridSim-users] Mahdi Nasseri has invited you to Dropbox

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We're excited to let you know that Mahdi Nasseri has invited you to Dropbox!

Mahdi Nasseri has been using Dropbox to sync and share files online and across computers, and thought you might want it too.

Visit http://www.dropbox.com/link/20._OCP7HUOSd/NjIxMDI5MzUzNw to get started.

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Re: [GridSim-users] question

[Marcos D. de A. <mar...@gm...>]

Dear Marziye,

the rating provided in the constructor of the workload is the number
of MIPS used to compute the number of millions of instructions that
the gridlets read from a job trace file will have.

Please note that the workload class is used to read information from a
file and create gridlets accordingly. The information that a job trace
file contains is usually the time in seconds at which the jobs were
submitted, number of CPUs required and for how long they executed.
This last period is given in seconds as well. So, when you create a
workload you must provide the number of MIPS of the resource from
which the job trace file was extracted. In this way, if a job
described in the file took 60 seconds to execute on that resource, and
you specify the rating as 1000, then the number of MIs of the gridlet
created by the workload will be 60*1000. If you assign the same rating
to the Grid resource you create, then the gridlet will take the same
time to execute as specified in the trace file.

The way the wokload class works is by submitting all the jobs read
from the file to an individual resource. If you want to submit jobs to
different resources, there are a few options:

+ Create various Workloads, each submitting jobs to a different resource.
+ Modify or extend the Workload class to submit jobs to different resources.
+ Create a broker, which behaves as a resource receiving the jobs from
the workload and then forwarding them to the respective Grid
resources.

Cheers,

Marcos


On 14 May 2010 15:04, marziye inanloo <mar...@gm...> wrote:
> Hello
>
> I read the conservative example in gridsim.parallel again.
>
> I have two questions and I hope you to help me.
>
>
>
> a-
>
> WorkloadFileReader model = new WorkloadFileReader(fileName, rating);
>
> In this line I know that you have used rating parameter to calculate the
> length of gridlets.
>
> Have you used this parameter for another purpose?
>
> And if we want to use more than one resource with different rating (not one
> resource with several partitions), which resource rating should we write in
> this line?
>
>
>
> b-
>
> Workload workload = new Workload("Load_1", resource.get_name(), model);
>
> Why have you used resource.get_name() in this function and when we want to
> use more than one resource which resource name should we write in this
> function?
>
>
>
> Could you please introduce me an article about my questions?
>
> Thanks a lot
>
> Bye



-- 
Marcos DIAS DE ASSUNCAO - Postdoctoral researcher
INRIA RESO - LIP Bureau 337, Ecole Normale Superieure
46, allee d'Italie - 69364 - Lyon Cedex 07 - France
Phone: +33 4 72 72 82 28

Re: [GridSim-users] [GridSim-developers] Regarding GridSim, Alea and MaGate

[ye <hua...@gm...>]

Hi Mayuri,

GridSim is of course good to start from scratch to implement your own
ecosystem. Alea is based on GridSim and provides a lot of instant available
features, such as a centralized meta-scheduler(high-level scheduler),
processing capability of multi-CPU request jobs, etc. MaGate is also
established on GridSim but work in a different direction. MaGate is using a
self-structure P2P approach as its Information System and every node has its
own high-level scheduler therefore no centralized point exist in the system.
Meanwhile, MaGate integrates a simplified community aware scheduling
protocol focus on reactive & dynamic scheduling (the protocol is accepted by
IEEE AINA 2010 and IEEE ICDCS 2010, I hope an available version can be
accessed soon). However, the MaGate is an ongoing work. The current
available version from the website is a little old. If everything is fine, a
new version is supposed to be published in May during a workshop in UK.

Cheers,

Ye

On Thu, Apr 29, 2010 at 8:47 AM, Mayuri Mehta <may...@gm...>wrote:

> Hi friends,
> I decided to use Gridsim for *evaluating the performance of Dynamic Load
> Balancing Algorithm in Distributed Systems *though it seems tough to do the
> same because i have to incorporate new dynamic strategy in gridsim.
> Meanwhile i came to know about Alea and Magate simulators which i feel will
> be better for my purpose. At present all simulators are new for me.
>
> If anybody is aware of all these simulators, then kindly guide me which one
> will be best suitable for my purpose and easy to use. Help will be
> appreciated.
>
> Thanks.
>
> Mayuri Mehta
> Research Scholar
>
> ------------------------------------------------------------------------------
> _______________________________________________
> Gridsim-developers mailing list
> Gri...@li...
> https://lists.sourceforge.net/lists/listinfo/gridsim-developers
>

[GridSim-users] Regarding GridSim, Alea and MaGate

[Mayuri M. <may...@gm...>]

Hi friends,
I decided to use Gridsim for *evaluating the performance of Dynamic Load
Balancing Algorithm in Distributed Systems *though it seems tough to do the
same because i have to incorporate new dynamic strategy in gridsim.
Meanwhile i came to know about Alea and Magate simulators which i feel will
be better for my purpose. At present all simulators are new for me.

If anybody is aware of all these simulators, then kindly guide me which one
will be best suitable for my purpose and easy to use. Help will be
appreciated.

Thanks.

Mayuri Mehta
Research Scholar

[GridSim-users] RIPRouter Exception on RegionalGIS Example

[Alex G. <fro...@ya...>]

I posted this before and no one answered. If anyone has any clue please help solve this.

"when running the RegionalGIS example
(example.regionalGIS) from the package examples if i change the number
of Regional GIS to 1 (i.e only one RegionalGIS) i get the following
exceptions:

///////////////////////////////////
Sim_system: No more future events
Gathering simulation data.
User_0: number of Global Resource = 0.
///////////////////////////////////
User_0: number of Global AR Resource = 0.
///////////////////////////////////
User_0: trying to ping Regional_GIS_0

-------- User_0 ----------------
null
-------- User_0 ----------------

User_0:%%%% Exiting body() at time 31.620026666666696
Exception in thread "router3" java.lang.NullPointerException
    at gridsim.net.RIPRouter.dequeue(Unknown Source)
    at gridsim.net.RIPRouter.processInternalEvent(Unknown
 Source)
    at gridsim.net.RIPRouter.processEvent(Unknown Source)
    at gridsim.net.Router.body(Unknown Source)
    at eduni.simjava.Sim_entity.run(Sim_entity.java:605)
Exception in thread "router1" java.lang.NullPointerException
    at gridsim.net.RIPRouter.dequeue(Unknown Source)
    at gridsim.net.RIPRouter.processInternalEvent(Unknown Source)
    at gridsim.net.RIPRouter.processEvent(Unknown Source)
    at gridsim.net.Router.body(Unknown Source)
    at eduni.simjava.Sim_entity.run(Sim_entity.java:605)
Exception in thread "router2" java.lang.NullPointerException
    at gridsim.net.RIPRouter.dequeue(Unknown Source)
    at gridsim.net.RIPRouter.processInternalEvent(Unknown Source)
    at gridsim.net.RIPRouter.processEvent(Unknown
 Source)
    at gridsim.net.Router.body(Unknown Source)
    at eduni.simjava.Sim_entity.run(Sim_entity.java:605)
"

Thanks,
Alex




      

[GridSim-users] question

[marziye i. <mar...@gm...>]

 hello
I have read conservative example in gridsim.parallel.
As you know this example uses only one resource, I want to ask, can we use
more than one resource in this example that each resource has own profile,
and when we want to send a gridlet to a resource, at first program searches
all profiles and find the best range of PEs for us, for example
which resource rang is less expensive or which is faster than the
others?then we send gridlet to chosen range of best resource? is it
possible?
excuse me if I ask many questios
I have understood that how profile works but I do not know what is the
essence of profile?is it tree?is it text file or array? and what is entry?
please help me
thanks

[GridSim-users] Defining External Load for GridSim experiments.

[Muhammad J. <ma...@dp...>]

Hi all,
I am not very well experienced with GridSim. I am trying to create a 
grid environment using Gridsim to replay a real Grid condition/environment.
For that i want to know how can i implement the external load that was 
receorded during a real execution on a real Grid.

thanks in advance,

Malik

[GridSim-users] IT DOESN'T FUNCTION - Implementing a packet scheduler requires extending from class PacketScheduler.

[Patrícia B. F. <pat...@ya...>]

I read the article: Anthony
Sulistio, Gokul Poduval, Rajkumar Buyya, Chen-Khong Tham. On incorporating
differentiated levels of network service into GridSim. Future Generation
Computer Systems 23 (2007) 606–615.

".....A packet scheduler is responsible for deciding the order in
which one or more packets will be sent downlink. Implementing a packet
scheduler requires extending from class PacketScheduler. In Gridsim, three
implementations of the packet scheduler are provided i.e. class FIFOScheduler,
SCFQScheduler and RateControlledScheduler."



I
followed the directions and created a class LIFOScheduler for tests. The
LIFOScheduler class is equal the FIFOScheduler class only with an alteration, as below.

public
synchronized Packet deque()

   
{

       
if (pktList.size() == 0) {

           
return null;

       
}

 

    
//   Packet p = (Packet) pktList.remove(0); // original

    
       Packet p = (Packet)
pktList.remove(pktList.size()-1); // my test

     
      return p;

   
}



When
I executed it didn’t function, enter into the loop.

Please can someone help me?

Regards,Patrícia





      

Re: [GridSim-users] Packet Scheduler - Help me please.

[Marcos D. de A. <mar...@gm...>]

Patricia,

I don't use the network support of GridSim, but I am wondering why you would
like to get always the last packet in the queue?

Marcos

2010/3/29 Patrícia Batista Franco <pat...@ya...>

> I'm trying to implement another packet scheduler, but before I decided to
> do some tests.
>
> I created a classe FIFOModifyScheduler with the following changes. Then I ran
> the example: Network - example03, but it didn't function.
>
> FIFOModifyScheduler.java
>
> public synchronized Packet deque()
>
>     {
>
>         if (pktList.size() == 0) {
>
>             return null;
>
>         }
>
>
>
>      //   Packet p = (Packet) pktList.remove(0); // original
>
>             Packet p = (Packet) pktList.remove(pktList.size()-1); // my
> test
>
>             return p;
>
>     }
>
> How do I implement the modified algorithm?
>
> Regards,
> Patrícia
>
>
>
> ------------------------------
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-- 
Marcos DIAS DE ASSUNCAO - Postdoctoral researcher
INRIA RESO - LIP Bureau 337, Ecole Normale Superieure
46, allee d'Italie - 69364 - Lyon Cedex 07 - France
Phone: +33 4 72 72 82 28

[GridSim-users] Resume and Pause functions in allocation policies

[Srishti S. <sri...@gm...>]

Hello,

I recently realized that in order to run multiple jobs on one processor, I
may also implement space shared policy along with its pause and resume
functions rather than implementing the time shared policy. Has anyone ever
used these functions? Where exactly are they called. Is there an example in
gridsim which uses these functions or which uses time shared policy?

Thank you
Srishti
Graduate student,
Mississippi State University

[GridSim-users] is that normal enlarged job size will prolong simulation time

[ye <hua...@gm...>]

Hi Dear all,

This is a recent problem that I didn't notice before. I m running Grid5000
grid archive data (1% load of original submitted jobs) on my simulation,
which means I have more than 10'000 jobs scheduled by my scheduler and
submitted to 26 simulated resources. So far, the simulation can finish in
reasonable time. (I am still working on GridSim 4.1)

Now, I wanna increase the job load by simply increasing job estimated time
(because it seems increasing job amount consumes a lot memory in my case),
then the job size can be enlarged due to: jobSize = Math.round(estimatedSec
* estimatedMachine);

However, when I increase the estimate time of each job from 1000 to 100'000,
the simulation took rather a long time to get finished. Is that normal in
GridSim? There is no events happening in my meta-scheduler but the gridsim
simulation-clock still ticks.

----

The following is a simple demonstration of the code, each node(cluster)
meta-scheduler has a class "S" extended from GridSim to deal with
scheduling, job submission and job return events in its "run()" method.

In the following code, the LOOP "while (Sim_system.running())" is seldom
visited but the simulation is somehow suspending. Is it waiting for
information from GridResource to get the job done? Is it the reason why
large job size takes more execution time because the GridResource needs more
time to get the job done? I thought it should not matter.

Help is highly appreciated!

Best Regards,

Ye

-----

public void body() {

        // some work to prepare resource

       // The loop to handler gridsim events
        while (Sim_system.running()) {

            // scheduler approach

            super.sim_get_next(ev);


            if (ev.get_tag() == Message.JobToMatchMaker) {

                continue;
            }

            ...

            if (ev.get_tag() == Message.ScheduleMadeByMatchMaker) {
               Job receivedJob = (Job) getData;

              // get target resource ID
              resourceID = ....

               super.send(resourceID, 0.0, GridSimTags.GRIDLET_SUBMIT,
receivedJob);

                continue;
            }

            if (ev.get_tag() == GridSimTags.GRIDLET_RETURN){
                this.onJobReturnFromResource(ev.get_data());

                continue;
            }



            // ye: if the simulation finishes then exit the loop
            if (ev.get_tag() == GridSimTags.END_OF_SIMULATION) {

                // if a continuous envrionment, the simulation may never be
halted.
                break;
            }

        }

        this.terminateMaGate();

        // CHECK for ANY INTERNAL EVENTS WAITING TO BE PROCESSED
        while (super.sim_waiting() > 0) {
            // wait for event
            super.sim_get_next(ev);
            log.warn("unexpected internal events received.");
        }

        // system monitoring
        this.maGateMonitor.routineCheck();
    }

[GridSim-users] Help me please - scheduler algorithm

[Patrícia B. F. <pat...@ya...>]

I'm trying to 
implement another packet scheduler, but before I decided to do 
some tests.

 I created a 
classe 
FIFOModifyScheduler with the following changes. 
Then I ran the example: Network - 
example03, but it didn't function.

FIFOModifyScheduler.java

 

public
synchronized Packet deque()

    {

        if (pktList.size() == 0) {

            return null;

        }

 

     //  
Packet p = (Packet) pktList.remove(0); // original

            Packet p = (Packet)
pktList.remove(pktList.size()-1); // my test



            return p;

    }
How do I implement the modified algorithm?

Regards,
Patrícia




      

Re: [GridSim-users] FW: questions regarding GridSim

[Marcos D. de A. <ma...@cs...>]

Hi Sana,

First, you don't need to call me sir; please use only my first name, Marcos.

Second, regarding you question, GridSim does not provide features to
simulate the distributed checkpointing you need. It is possible to
implement that, but I believe it would not be trivial. Some allocation
policies allow you to pause the execution of Gridlets. For example,
please have a loot at the SpaceShared policy. The pause method can
provide the basic framework you need to implement the more
sophisticated features you require.

About your code, you can post excerpts of it in the GridSim mailing
list along with your questions. In this way, the current GridSim
developers would be able to help you.

Regards,

Marcos


On 2 April 2010 10:14, SANA MALIK <dua...@ho...> wrote:
> Hello Sir,
>
> i found you to be very helpful on sourceForge. so sending you my problem
> with great hope for help.
>
> i am a research student and have some pproblems regarding GridSim, will you
> please help me?
>
> my objective is to store checkpoint on multiple storage devices that reside
> in different places in Grid. by checkpoint i mean the executed portion of
> the job that is taken after some time the job has been started. now the
> confussion is, whether there is any specific method to replicate checkpoints
> in gridsim or should i define my own method to do so. i am studying data
> grid examples where file replication is done but still i am confused about
> the problem because i want to replicate executed portion of the job not a
> file.
>
> should i send you my code for analysis?
>
> looking forward for your quick response.
>
> best regards
>
> Sana Malik
>
>
>
>
>
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