Re: [GridSim-users] question about Simulation with failure

[Agustín C. H. <ag...@ds...>]

Hi Jiang,

lijiang wrote:
> hello, everyone,
>
> I have read the example code of simulation with failure. In the
> example,  class "HyperExponential" is used to produce the random of
> failure-number,failure-begin-time and failure-length. And it seems
> that the failure on a  resource happens only one time.
Yes, u r right.
> In my Project I want to do this job: On a certain resource the
> failures should be produced many times with a certain percent. For
> example: On a resource "Res1" the failures should be stochastic
> produced many times during 100 minutes. And the sum of
> failure-intervals should be 5% of the whole time-interval. It means
> that the sum of the failures on "Res1" should be 5 minutes.
>
> Question1:
> In GridSim can we let many failures produced on a certain resource?
> When yes, how?
On RegionalGISWithFailure class, check what is done on the event of a
failure. Just do the same everytime u want a failure. Essentially, the
regGisWithFailure class sends an GridSimTags.GRIDRESOURCE_FAILURE event
to itself in order to start failing resources. On the reception of this
event, it is decided which resource will fail, when and how long the
failure will be. If u want each res to fail multiple times, u have to
modify the way how RegionalGISWithFailure behaves on the reception of
this event.
>
> Question2:
> Can class "HyperExponential" produce this kind of radom failures? When
> not, is there any other java-class that can do it?
"HyperExponential" is only a way to generate random numbers, what u use
them for is up to u. ut I'd say u'll have to implement it yourself.

Regards,

Agustin
>
> Thanks
>
> regards
>
> Jiang Li
>
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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