Re: [GridSim-users] gridsim simulation

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

I am not testing the code below, but it should work more or less as 
described in this email. In the entity that submits the jobs you 
implement a method that packs the Gridlets in a list and schedules an 
event to be received by the GridResource. The method should contain more 
or less the following:

// Creates the list
LinkedList<Gridlet> jobList = new LinkedList<Gridlet>();

// and adds the Gridlets to it
jobList.add( ... );

// Create the event tag PACK_OF_GRIDLETS somewhere
send(super.output, delay, PACK_OF_GRIDLETS, new IO_data(jobList, 
jobList.size() * size_of_one_job, resourceID, netServiceLevel);

Then extend GridResource class and implement the method 
processOtherEvent(Sim_event ev), which will be more or less as follows:

protected void processOtherEvent(Sim_event ev) {
       
   if(ev.get_tag() ==  PACK_OF_GRIDLETS) {
      // get the list of Gridlets
      LinkedList<Gridlet> jobList = (LinkedList<Gridlet>)ev.get_data();
     
      // for each gridlet, makes a submission to the resource itself
      for (Gridlet gl : jobList) {
           processGridletSubmit(gl, false);
      }
   } else {
       super.processOtherEvent(ev);
   }
}

And the processGridletSubmit() should look like:

private void processGridletSubmit(Gridlet gl, boolean ack) {
         try {

            // checks whether this Gridlet has finished or not
            if (gl.isFinished()) {
                String name = GridSim.getEntityName( gl.getUserID() );
                System.out.println(super.get_name() + ": Warning - 
Gridlet #" +
                        gl.getGridletID() + " owned by " + name +
                        " is already completed/finished.");
                System.out.println("Therefore, it is not being executed 
again");
                System.out.println();

                // NOTE: If a Gridlet has finished, then it won't be 
processed.
                // So, if ack is required, this method sends back a result.
                // If ack is not required, this method don't send back a 
result.
                // Hence, this might cause GridSim to be hanged since 
waiting
                // for this Gridlet back.
                if (ack) {
                    int[] array = new int[2];
                    array[0] = gl.getGridletID();
                    array[1] = GridSimTags.FALSE;

                    // unique tag = operation tag
                    int tag = GridSimTags.GRIDLET_SUBMIT_ACK;
                    super.send(super.output, GridSimTags.SCHEDULE_NOW, tag,
                            new IO_data(array, SIZE, gl.getUserID()) );
                }

                super.send(super.output, 0, GridSimTags.GRIDLET_RETURN,
                    new 
IO_data(gl,gl.getGridletOutputSize(),gl.getUserID()) );

                return;
            }

            // process this Gridlet to this GridResource
            gl.setResourceParameter(super.get_id(), 
resource_.getCostPerSec());
            policy_.gridletSubmit(gl, ack);
        } catch (ClassCastException c) {
            System.out.println(super.get_name() + 
".processGridletSubmit(): " +
                    "ClassCastException error.");
            System.out.println( c.getMessage() );
        } catch (Exception e) {
            System.out.println(super.get_name() + 
".processGridletSubmit(): " +
                    "Exception error.");
            System.out.println( e.getMessage() );
        }
}


Well, the code above may not work exactly like I described here, but you 
can have an idea on how to do it.

Regards,

Marcos


-Sha Fatin wrote:
> Hi,
>  
>  Regarding Vishnu question and Marcos answer, I'm interesting to know 
> more on those technique.
>  
> As , Marcos said, we need to extent the GridResource class, meaning we 
> need to extend some
> feature in gridletSubmit? Can you briefly give some idea on how to 
> adjust this event environment?
>  
> Thank you.
>  
>
>
>  
> On Mon, Feb 15, 2010 at 6:05 AM, Marcos Dias de Assuncao 
> <ass...@ac... <mailto:ass...@ac...>> wrote:
>
>     Dear Vishnu Kant Soni,
>
>     In order to send Gridlets to resources, you can utilise the
>     gridletSubmit() methods implemented in GridSim class. However, they
>     dispatch one job per method call. If you want to dispatch a set of
>     gridlets, you should call that method several times, one per job in
>     the set. Alternatively, you can implement the feature to send a list
>     of jobs to a Grid resource (i.e. schedule a new simulation event type
>     for it). But in that case you need to extend the GridResource class to
>     ensure that it can handle an event whose data contains a list of jobs.
>
>     Regards,
>
>     Marcos
>
>
>     On 10 February 2010 13:15, vishnu soni <vis...@gm...
>     <mailto:vis...@gm...>> wrote:
>     > hi,
>     >      how i set the different baud_rate for different resources.and
>     > how i grouped the jobs according to job MI.means i m comparing
>     the job
>     > MI to resource MIPS and assign the jobs in a groups ,but how i send
>     > the goups jobs to the resource.plz explain me sir and give me some
>     > code for that.
>     >                 thanks,
>     >
>     >                                    vishnu kant soni
>     >                                     kiit, bhubneswar,india
>     >
>     >
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