gridsim-users

[GridSim-users] Delaying the shutdown of grid enities

[innocent d. <dib...@ya...>]

 Hi Marcos,
I am simulating a failure environment and I want to delay the GIS entity from sending a grid shutdown message until all users in the various GIS network has received their jobs back please how can I achieve this urgently, please help 


thanks


      

Re: [GridSim-users] Delaying the shutdown of grid enities

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

Hi Innocent,

please note that the GIS entity will not shutdown the simulation until 
all user entities have called:

super.shutdownUserEntity();
super.terminateIOEntities();

Hence, the solution is to prevent user entities from invoking these 
methods before all jobs are received. You can have a loop in you user 
entities testing if all jobs have been received or not, and breaking 
from that loop and finally calling the methods above only if all jobs 
have been received. In other words, the body of your user entities 
should contain something more or less like:

Sim_event ev = new Sim_event();
while (Sim_system.running()) {
    sim_get_next(ev);

    // process the received event here, if it is a job
    // increment a counter for the jobs received
    ...
               
    // if all the Gridlets have been collected. Note that
    // nCompletedJobs is the counter with number of jobs received
    // and nSubmittedJobs is a counter with the number of jobs
    // dispatched to resources
   
    if (nCompletedJobs == nSubmittedJobs) {
        break;
    }
}

// shut down all the entities, including GridStatistics entity since
// we used it to record certain events.
shutdownGridStatisticsEntity();
shutdownUserEntity();
terminateIOEntities();

I hope the example helps.

Kind regards,

Marcos

innocent dibia wrote:
>
>  Hi Marcos,
> I am simulating a failure environment and I want to delay the GIS 
> entity from sending a grid shutdown message until all users in the 
> various GIS network has received their jobs back please how can I 
> achieve this urgently, please help
>
> thanks
>
>

Re: [GridSim-users] Delaying the shutdown of grid enities

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

> Please how do I schedule the internal event to prevent the resources 
> from sutting down.
>  

Extend the GridResource class and its body method. In the body you 
trigger an internal event. The body of your extended resource should 
look like:

public void body() {
    // schedule an internal event with a the tag INTERNAL_EVENT_TAG
    super.sim_schedule(super.get_id(), 10.0, INTERNAL_EVENT_TAG);

    super.body();
}


Then, you implement the method processOtherEvent(Sim_event) to handle 
that internal event and dispatch a new one. The method should look like:

protected void processOtherEvent(Sim_event ev) {
        if (ev.get_tag() == INTERNAL_EVENT_TAG) {
               // schedule the new internal event with a delay of 10 
seconds with a the tag INTERNAL_EVENT_TAG
                super.sim_schedule(super.get_id(), 10.0, 
INTERNAL_EVENT_TAG);
        } else {
              super.processOtherEvent(ev);
        }
}

Regards,

Marcos