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Re: [GridSim-users] help on GridSim
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From: <ag...@ds...> - 2007-10-23 09:40:46
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Hi Chao,
Chao JIN escribió:
> Hi, Agustin
>
> My entities are created as following:
>
> 1) I changed the RegionalGISWithFailure class to make it can replay failures
> for GridResourceWithFailure from log.
>
> 2) I create a RegionalGISWithFailure and a SimpleLink as following
> Link link = new SimpleLink("rc_link", baud_rate, propDelay, mtu)
> RegionalGISWithFailure gis = new RegionalGISWithFailure("GIS", link,
> logFile);
>
> 3) I create GridResourceWithFailure, and call setRegionalGIS(gis)
>
> Do you think above details are enough?
>
> BTW: I read the examples for GridSimWithFailure, where no Gridsim.setGIS()
> is invoked. So I am not sure how I can let GridSim know which is GIS?
>
You don't have to call Gridsim.setGIS(), I don't know when it is needed,
but it's not needed for the resource faulure functionality.
You can ask Anthony when that function is needed.
Gridsim will always have a system GIS, and apart from that, we have
another GIS.
This second GIS is a regional GIS, and there may be several of them in
each topology.
I think that the function Gridsim.setGIS() is to modify the system GIS,
so not needed for us.
I still don't know what is happening. So, could you send me the file
where you create entities?
Regards,
Agustin
> Regards,
> Chao
> On Tue, 23 Oct 2007 09:30:05 +0200, Agustín Caminero Herraez wrote
>
>> Hi Chao,
>>
>> By now, I have no idea on what is happening.
>>
>> So, could you tell me how you create your entities? There may be
>> something wrong whit it.
>>
>> BTW, could you please include the mailing list in your emails? This
>> way, emails will be recorded, and anybody can use them in the future.
>>
>> Regards,
>>
>> Agustin
>>
>> Chao JIN escribió:
>>
>>> Thanks for your response.
>>>
>>> Now I got an exception as follows:
>>>
>>> Exception in thread "Thread-1"
>>>
> java.lang.ArrayIndexOutOfBoundsException: -1
>
>>> at java.util.ArrayList.get(Unknown Source)
>>> at eduni.simjava.Sim_system.send(Sim_system.java:600)
>>> at eduni.simjava.Sim_entity.sim_schedule(Sim_entity.java:342)
>>> at gridsim.net.SimpleLink.body(SimpleLink.java:204)
>>> at eduni.simjava.Sim_entity.run(Sim_entity.java:603)
>>>
>>> I think the reason is in the body() of SimpleLink, it tries
>>> GridSim.getGridInfoServiceEntityId().
>>>
>>> Could you plz tell me if I need to specify the GridInfoService for
>>> GridSimWithFailure? or how can I solve above exception?
>>>
>>> Best,
>>> Chao
>>> On Fri, 19 Oct 2007 09:38:09 +0200, Agustín Caminero Herraez wrote
>>>
>>>
>>>> Hi Chao Jin,
>>>>
>>>> Chao JIN escribió:
>>>>
>>>>
>>>>> Hi,
>>>>>
>>>>> I have a question. RegionalGISWithFailure needs a parameter of Link.
>>>>>
> How
>
>>>>> could I specify this parameter?
>>>>>
>>>>>
>>>>>
>>>> When you build the network topology, you must connect each entity
>>>> with a router via a link. This link is the parameter that you need
>>>> to create a RegionalGISWithFailure. If you take a look at the
>>>> resource failure examples, you will see that prior to the creation
>>>> of any entity, a link is created, and this link is used as a
>>>> parameter to create the entity. For example:
>>>>
>>>> Link link = new SimpleLink(gisName + "_link", baud_rate,
>>>> propDelay, mtu);
>>>> ...
>>>> RegionalGISWithFailure gis = new RegionalGISWithFailure(gisName,
>>>> link, failureNumResPattern,
>>>> failureTimePattern,
>>>> failureLengthPattern);
>>>>
>>>> In order to create the link, you just need the propagation delay,
>>>> MTU and speed of the link (in bits per second).
>>>>
>>>>
>>>>
>>>>> I'd like to simulate a environemnt consisting one GridResourceIndex
>>>>>
>>>>>
>>> server
>>>
>>>
>>>>> and lots of machines, where machines may have frequent failures. The
>>>>>
>>>>>
>>> user
>>>
>>>
>>>>> query the GridResourceIndex server to get the current available
>>>>>
>>>>>
>>> machines,
>>>
>>>
>>>>> and then send tasks to machines.
>>>>>
>>>>>
>>>>>
>>>> That's how the RegionalGISWithFailure works. So, your
>>>> GridResourceIndex can be implemented as a RegionalGISWithFailure entity.
>>>>
>>>>
>>>>> Could you plz tell me how to specify the link for above target
>>>>>
>>>>>
>>> simulation?
>>>
>>>
>>>>> One router is enough?
>>>>>
>>>>>
>>>>>
>>>> Sure, network topology does not affect your functionality.
>>>> You can have a network topology with one router, or with many of
>>>> them, it doesn't matter.
>>>>
>>>>
>>>>>
>>>>>
>>>>> Thanks,
>>>>>
>>>>>
>>>>>
>>>> Anytime,
>>>>
>>>> Agustin
>>>>
>>>>
>>>>> Chao Jin
>>>>>
>>>>> On Mon, 15 Oct 2007 11:41:25 +0200, Agustín Caminero Herraez wrote
>>>>>
>>>>>
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> Yes, you will have to modify RegionalGISWithFailure.java.
>>>>>> In this class, you must read the log files, and schedule the
>>>>>> fail/alive events based on them.
>>>>>>
>>>>>> Agustin
>>>>>>
>>>>>> Anthony Sulistio escribió:
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Agustin may tell you more about this.
>>>>>>> But, if you insist on reading from a trace file,
>>>>>>> then perhaps you need to modify the RegionalGISWithFailure.java,
>>>>>>> since this class is responsible for sending messages to
>>>>>>> resources for fail/alive.
>>>>>>>
>>>>>>>
>>>>>>> anthony
>>>>>>>
>>>>>>>
>>>>>>> On Mon, 15 Oct 2007, Chao JIN wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> hi, Anthony
>>>>>>>>
>>>>>>>> I am using GridSim to simulate a distributed environment with
>>>>>>>>
> frequent
>
>>>>>>>> failures. I have the failure logs of some machines in a cluster,
>>>>>>>>
> and
>
>>>>>>>>
>>>>>>>>
>>> I'd
>>>
>>>
>>>>>>>> like to simulate failures according to these log files.
>>>>>>>>
>>>>>>>> I have found GridSim can simulate failures through some functions,
>>>>>>>> such as
>>>>>>>> HyperExponential, etc. However, this is not what I need.
>>>>>>>>
>>>>>>>> Do I have to add new modules over GridSim? or How could I do it in
>>>>>>>>
> a
>
>>>>>>>> quicker
>>>>>>>> way?
>>>>>>>>
>>>>>>>> I am looking forward to your answers.
>>>>>>>>
>>>>>>>> BTW: I just went to your seat, but you were not there.
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>> Chao
>>>>>>>> --
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>> --
>>>>>> ========================================================
>>>>>> Agustin Caminero-Herraez
>>>>>> PhD Student
>>>>>> Computing Systems Department
>>>>>> The University of Castilla La Mancha, Albacete. Spain.
>>>>>> Phone: +34 967 599200 Ext. 2693. Fax : +34 967 599224
>>>>>> http://www.i3a.uclm.es/
>>>>>> ========================================================
>>>>>>
>>>>>>
>>>>>>
>>>>> --
>>>>>
>>>>>
>>>>>
>>>>>
>>>> --
>>>> ========================================================
>>>> Agustin Caminero-Herraez
>>>> PhD Student
>>>> Computing Systems Department
>>>> The University of Castilla La Mancha, Albacete. Spain.
>>>> Phone: +34 967 599200 Ext. 2693. Fax : +34 967 599224
>>>> http://www.i3a.uclm.es/
>>>> ========================================================
>>>>
>>>>
>>> --
>>>
>>>
>>>
>> --
>> ========================================================
>> Agustin Caminero-Herraez
>> PhD Student
>> Computing Systems Department
>> The University of Castilla La Mancha, Albacete. Spain.
>> Phone: +34 967 599200 Ext. 2693. Fax : +34 967 599224
>> http://www.i3a.uclm.es/
>> ========================================================
>>
>
>
> --
>
>
--
========================================================
Agustin Caminero-Herraez
PhD Student
Computing Systems Department
The University of Castilla La Mancha, Albacete. Spain.
Phone: +34 967 599200 Ext. 2693. Fax : +34 967 599224
http://www.i3a.uclm.es/
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