From: Jonathan M. <jon...@bs...> - 2009-03-04 17:47:36
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi good afternoon, I'm working on the datagrid package of GridSim and I wanted to execute a very simple simulation with a simple network topology (up to 6 routers) that form a complete graph of links among them. But I have a problem with total time execution of the simulation...here you have some results: #routers total exec. time (milliseconds) 2 (1 link) 340 3 (3 links) 380 4 (6 links) 3000 (3 seconds) 5 (10 links) 600000 (10 minutes) Extrapolating, with 6 routers would be 6 hours, ... with 8 routers (28 links) 52 years! :-S There is only 1 user, that sends 1 gridlet with a file of 1MB (very simple) And I'm using a laptop with an Intel Core 2 Duo 2,4GHz processor, and 4GB of RAM. Could anybody tell if this is normal, and why is it happening?...or better, does anbydoy know a solution for this, or has any idea? Thank you very much - -- - ----------------------------------------------------------------------- Jonathan Martí Fraiz Storage Systems Research Group - Computer Sciences Department Barcelona Supercomputing Center - Centro Nacional de Supercomputación www : http://www.bsc.es/StorageSystems email : jonathan(dot)marti(at)bsc(dot)es phone : (0034) 934054281 - ----------------------------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkmuvrgACgkQ4cH1a6R2mCsnCQCbBrqigUdFy+WTS/iFkOGFweHk FKIAoN7bvTyhmFLo9+7vn3RxVi5U5tNe =Uri+ -----END PGP SIGNATURE----- |
From: Srikumar V. <sri...@gm...> - 2009-03-04 23:11:13
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Hi Jonathan, You are probably using the packet network in which each file is divided into packets of, AFAIK, 64KB each. Each of the packets is an entity so the number of objects exponentially increases. You could use the latest GridSim (4.2) which is supposed to have flow networking in which each data transfer is represented as a flow or you can make the packet size equal to the file size. Another choice is to hack in a flow transfer by making the recipient get only 2 packets ,one at the start of a file and one at the end sent after a delay equal to size of file divide by bandwidth. HTH Srikumar. On Thu, Mar 5, 2009 at 4:47 AM, Jonathan Marti <jon...@bs...> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi good afternoon, > > I'm working on the datagrid package of GridSim and I wanted to execute a very > simple simulation with a simple network topology (up to 6 routers) that form a > complete graph of links among them. > > But I have a problem with total time execution of the simulation...here you have > some results: > > #routers total exec. time (milliseconds) > 2 (1 link) 340 > 3 (3 links) 380 > 4 (6 links) 3000 (3 seconds) > 5 (10 links) 600000 (10 minutes) > > Extrapolating, with 6 routers would be 6 hours, ... with 8 routers (28 links) 52 > years! :-S > > There is only 1 user, that sends 1 gridlet with a file of 1MB (very simple) > > And I'm using a laptop with an Intel Core 2 Duo 2,4GHz processor, and 4GB of RAM. > > Could anybody tell if this is normal, and why is it happening?...or better, does > anbydoy know a solution for this, or has any idea? > > Thank you very much > > - -- > - ----------------------------------------------------------------------- > Jonathan Martí Fraiz > Storage Systems Research Group - Computer Sciences Department > Barcelona Supercomputing Center - Centro Nacional de Supercomputación > www : http://www.bsc.es/StorageSystems > email : jonathan(dot)marti(at)bsc(dot)es > phone : (0034) 934054281 > - ----------------------------------------------------------------------- > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iEYEARECAAYFAkmuvrgACgkQ4cH1a6R2mCsnCQCbBrqigUdFy+WTS/iFkOGFweHk > FKIAoN7bvTyhmFLo9+7vn3RxVi5U5tNe > =Uri+ > -----END PGP SIGNATURE----- > > ------------------------------------------------------------------------------ > Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA > -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise > -Strategies to boost innovation and cut costs with open source participation > -Receive a $600 discount off the registration fee with the source code: SFAD > http://p.sf.net/sfu/XcvMzF8H > _______________________________________________ > Gridsim-users mailing list > Gri...@li... > https://lists.sourceforge.net/lists/listinfo/gridsim-users > |
From: Jonathan M. <jon...@bs...> - 2009-03-12 12:39:32
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ok, then using FlowLinks instead of SimpleLinks I get this error: Exception in thread "Thread-15" java.lang.ClassCastException: gridsim.net.NetPacket cannot be cast to gridsim.net.flow.FlowPacket at gridsim.net.flow.FlowLink.registerFlow(FlowLink.java:419) at gridsim.net.flow.FlowLink.enque(FlowLink.java:316) at gridsim.net.flow.FlowLink.processEvent(FlowLink.java:230) at gridsim.net.flow.FlowLink.body(FlowLink.java:202) at eduni.simjava.Sim_entity.run(Sim_entity.java:603) Any ideas? Thanks Srikumar Venugopal escribió: > Hi Jonathan, > You are probably using the packet network in which each file is > divided into packets of, AFAIK, 64KB each. Each of the packets is an > entity so the number of objects exponentially increases. You could use > the latest GridSim (4.2) which is supposed to have flow networking in > which each data transfer is represented as a flow or you can make the > packet size equal to the file size. > Another choice is to hack in a flow transfer by making the > recipient get only 2 packets ,one at the start of a file and one at > the end sent after a delay equal to size of file divide by bandwidth. > > HTH > > Srikumar. > > On Thu, Mar 5, 2009 at 4:47 AM, Jonathan Marti <jon...@bs...> wrote: > Hi good afternoon, > > I'm working on the datagrid package of GridSim and I wanted to execute a very > simple simulation with a simple network topology (up to 6 routers) that form a > complete graph of links among them. > > But I have a problem with total time execution of the simulation...here you have > some results: > > #routers total exec. time (milliseconds) > 2 (1 link) 340 > 3 (3 links) 380 > 4 (6 links) 3000 (3 seconds) > 5 (10 links) 600000 (10 minutes) > > Extrapolating, with 6 routers would be 6 hours, ... with 8 routers (28 links) 52 > years! :-S > > There is only 1 user, that sends 1 gridlet with a file of 1MB (very simple) > > And I'm using a laptop with an Intel Core 2 Duo 2,4GHz processor, and 4GB of RAM. > > Could anybody tell if this is normal, and why is it happening?...or better, does > anbydoy know a solution for this, or has any idea? > > Thank you very much > >> - ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA - -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise - -Strategies to boost innovation and cut costs with open source participation - -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Gridsim-users mailing list Gri...@li... https://lists.sourceforge.net/lists/listinfo/gridsim-users >> - -- - ----------------------------------------------------------------------- Jonathan Martí Fraiz Storage Systems Research Group - Computer Sciences Department Barcelona Supercomputing Center - Centro Nacional de Supercomputación www : http://www.bsc.es/StorageSystems email : jonathan(dot)marti(at)bsc(dot)es phone : (0034) 934054281 - ----------------------------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkm5AogACgkQ4cH1a6R2mCuzTwCfbKuRVto7ZUPtnSxozrYiFRJX WjQAoO8T80Oz3D0Ff0KUF62eivbLPNkB =bra1 -----END PGP SIGNATURE----- |