Re: [GridSim-users] Simulating Grid Resources with Failures

[Agustín C. H. <ag...@ds...>]

Hi Eran,

On 12/05/2010 07:12 AM, Eran Chinthaka Withana wrote:
> Hi,
>
> I increased the number of gridlets to 50 and ran the first two example 
> programs found under ResourceFailure examples. But all the gridlets 
> were marked as success, after the simulation. How can I make some of 
> the gridlets to fail?
Just modify the parameters of the distributions that define the failure 
pattern. In ResFailureEx01.java u have a brief explanation of this:

             // HyperExponential: mean, standard deviation, stream
             // how many resources will fail
             HyperExponential failureNumResPattern =
                     new HyperExponential(totalMachines / 2, 
totalMachines, 4);

             // when they will fail
             HyperExponential failureTimePattern =
                     new HyperExponential(25, 100, 4);

             // how long the failure will be
             HyperExponential failureLengthPattern =
                     new HyperExponential(20, 25, 4); // big test: (20, 
100, 4);

             // creates a new Regional GIS entity that generates a resource
             // failure message according to these patterns.
             RegionalGISWithFailure gis = new 
RegionalGISWithFailure(gisName,
                               link, failureNumResPattern, 
failureTimePattern,
                               failureLengthPattern);

Regards,

Agustin

>
> I assume these examples help to simulate a grid with resource 
> failures. Also it will be nice if you can help me to understand how I 
> can control the parameters to control resource failures in the 
> simulations.
>
> Thanks,
> Eran Chinthaka Withana
>
>
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-- 
Dr. Agustin Caminero
Assistant Professor
Dept. of Communication and Control Systems
The National University of Distance Education
Madrid. Spain
E-Mail:acc...@sc...
Phone: +34 913 989 468
http://www.uned.es