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Re: [GridSim-users] how create machines during the simulation
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From: Gilberto C. <gil...@gm...> - 2008-06-23 13:16:16
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Thanks Agustín, I'm looking at them carefully. On Mon, Jun 23, 2008 at 4:34 AM, Agustín Caminero Herráez < ag...@ds...> wrote: > Hi Gilberto, > > Gilberto Cunha escribió: > >> Hi! Agustín and Marcos. >> >> Thank you for your suggestions. >> >> I'm looking at them carefully. Initially i would' like use the resource >> failure functionality and set resources initially as failed as you wrote. >> >> But i' don't understand very well what's means some parameters about the >> constructor parameters of class HyperExponential. >> >> |*HyperExponential < >> http://www.gridbus.org/gridsim/doc/api/gridsim/util/HyperExponential.html#HyperExponential%28double,%20double,%20int%29>*(double >> mu, double sigma, int i)| >> >> * What's means the parameter "i" ? >> >> >> * and If I want simulate 40% (80 resources) of resources intially >> failed, and during the simulation join 2,5% (5 resources is the >> same of one machine with one PE) following the distribuition and >> fail more 2,5% of resources available. I have a set of 200 >> GridResources, where each resource is just one machine with one >> PE. For example, what's values I should use. >> >> The hyperexponential distribution is used just to make a randomized > selection of failed resources, failure length, and failure start time. So, > if u want to make such a concrete simulation (without randomized stuff > regarding the number of failed resources), what u should do is remove the > use of that distribution for that purpose, and manually set the number of > failed resources, failures times and so on. > > In order to do this, u have to modify the code of the > RegionalGISWithFailure class, so that u set 80 resources initially failed. > Then, u set the recovery of 5 of those resources (the time of the recovery > can be chosen by a distribution). Later, u must set another 5 resources as > failed (when they fail can be chosen at random). > > To do this, u have to modify processGridResource_Failure function: > > 1- Set 80 resources initially as failed: Step 4 in Fig 3 in the first > document mentioned below. Send a GRIDRESOIURCE_FAILURE event to those 80 > resources. The getNextFailureLengthSample() function should return a finite > duration for 5 of those resources (since they will recover during sims), so > u may probably need to modify this function. For the other 75 resources that > will not recover, the duration of the failure should be infinite. > > 2- For the 5 resources initially working that fail during sims, u must > manually set the number of resources that fail, and choose the moment and > length of the failure. > > U will find an explanation of the way how the failure functionality works > here: > > > http://www.dsi.uclm.es/descargas/thecnicalreports/DIAB-07-01-1/DIAB-07-01-1.pdf > http://www.gridbus.org/papers/gridsim-failure-detection-icpads2007.pdf > > Take a look into the processGridResource_Failure function and tell em if u > keep having doubts. > > All the best, > > Agustin > > Thanks and Regards, >> >> Gilberto Cunha >> >> >> >> >> >> On Wed, Jun 11, 2008 at 7:16 AM, Marcos Dias de Assuncao < >> ma...@cs... <mailto:ma...@cs...>> wrote: >> >> >> Dear Gilberto, >> >> In theory you could create a GridResource dynamically during the >> simulation in the same way that you create GridResources before >> the simulation starts. One entity could, for example, create a >> resource with the required characteristics. The constructors of >> the Sim_entity class call Sim_system.add(this) to include the just >> created entity to the list of entities created. The method add of >> sim_system is as follows: >> >> /** >> * Add a new entity to the simulation. This is present for >> compatibility with existing >> * simulations since entities are automatically added to the >> simulation upon instantiation. >> * @param e The new entity >> */ >> public static void add(Sim_entity e) { >> Sim_event evt; >> if (running) { >> // Post an event to make this entity >> evt = new >> Sim_event(Sim_event.CREATE,clock,current_ent().get_id(),0,0, e); >> future.add_event(evt); >> } else { >> if (e.get_id()==-1) { // Only add once! >> e.set_id(entities.size()); >> entities.add(e); >> } >> } >> } >> >> Basically, if the simulation is running, it will schedule one >> event, which is handled by Sim_system itself in a private method. >> >> Everything looks fine. However, in practice SimJava has a bug >> because future.add_event(evt); may raise an exception as it is not >> synchronised and the list called future (containing the future >> simulation events) may be changed simultaneously by two entities. >> I had concurrent modification problems with the auction framework >> when adding entities at runtime. It is actually simple to solve >> it, but it requires one to change SimJava. >> >> Regards, >> >> Marcos >> >> >> >> On 11/06/2008, at 5:28 PM, Agustín Caminero Herráez wrote: >> >> Hello, >> >> I don't think u can create gridResources dynamically during >> simulations. >> >> What u can do instead is use the resource failure >> functionality and set resources initially as failed, then make >> them available as sim progresses. >> >> This way u would simulate the dynamic creation of GridResources. >> >> Regards, >> >> Agustin >> >> >> Gilberto Cunha escribió: >> >> >> Hello, >> >> I have a question regarding GridResource. >> My doubt is as follows: >> >> How can i create GridResources during the simulation, in a >> dynamic way? >> >> Regards, >> -- Gilberto Cunha Filho >> gil...@gm... <mailto:gil...@gm...> >> <mailto:gil...@gm... >> <mailto:gil...@gm...>> >> SISMO - Laboratório de Sistemas e Mobilidade >> UFMA >> >> ------------------------------------------------------------------------ >> >> >> ------------------------------------------------------------------------- >> Check out the new SourceForge.net Marketplace. >> It's the best place to buy or sell services for >> just about anything Open Source. >> http://sourceforge.net/services/buy/index.php >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Gridsim-users mailing list >> Gri...@li... >> <mailto:Gri...@li...> >> https://lists.sourceforge.net/lists/listinfo/gridsim-users >> >> >> -- =============================================== >> Agustin Caminero >> PhD Student >> Computing Systems Department >> The University of Castilla La Mancha, Albacete. Spain. >> Phone: +34 967 599 200 Ext. 2693. Fax: +34 967 599 343 >> http://www.i3a.uclm.es/ >> =============================================== >> >> >> <agustin.vcf>------------------------------------------------------------------------- >> >> >> Check out the new SourceForge.net Marketplace. >> It's the best place to buy or sell services for >> just about anything Open Source. >> >> http://sourceforge.net/services/buy/index.php_______________________________________________ >> Gridsim-users mailing list >> Gri...@li... >> <mailto:Gri...@li...> >> https://lists.sourceforge.net/lists/listinfo/gridsim-users >> >> >> >> >> >> -- >> Gilberto Cunha Filho >> gil...@gm... <mailto:gil...@gm...> >> SISMO - Laboratório de Sistemas e Mobilidade >> UFMA >> > > -- > =============================================== > Agustin Caminero > PhD Student > Computing Systems Department > The University of Castilla La Mancha, Albacete. Spain. > Phone: +34 967 599 200 Ext. 2693. Fax: +34 967 599 343 > http://www.i3a.uclm.es/ > =============================================== > > -- Gilberto Cunha Filho gil...@gm... SISMO - Laboratório de Sistemas e Mobilidade UFMA |
