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

[Agustín C. H. <ag...@ds...>]

Hi Eran,

I've just run the first example of the resource failure functionality
and there are resources failing, and gridlets got failed because of that.

For instance, among the output I get:
Ex01_User0: Receiving Gridlet #0 with status Failed at time =
31.88541776882028 from resource Ex01_Res_1

This means that the gridlet 0 of user 0 is failed. then, user 0 will
resubmit the gridlet to another resource.

In the end of the experiment, all the gridlets will be executed, no
matter if they failed in the mean time.

Regards,

Agustin

On 12/10/2010 04:02 PM, Eran Chinthaka Withana wrote:
> Hi Augustin,
>
> Thanks for the reply. I played a little bit with these params, but was
> not successful. Since this is an example to demo resource failures, I
> thought the given numbers will make some resources to fail
> automatically in this test. 
>
> Thanks,
> Eran Chinthaka Withana
>
>
> 2010/12/10 Agustín Caminero Herráez <ag...@ds...
> <mailto: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... <mailto:E-Mail:acc...@sc...>
>     Phone: +34 913 989 468
>     http://www.uned.es
>
>

-- 
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