I think we are getting close now, However now I have runtime exception: Exception in thread "main" java.lang.RuntimeException: interface org.apache.hama.graph.VerticesInfo not org.apache.hama.graph.ListVerticesInfo at org.apache.hadoop.conf.Configuration.setClass(Configuration.java:858)
On Friday, January 17, 2014 2:30 PM, Tommaso Teofili <[email protected]> wrote: ah yes, sorry, you also have to specify the interface, I don't have the code in front of me but it should be : conf.setClass("hama.graph.vertices.info", org.apache.hama.graph.VerticesInfo.class, org.apache. hama.graph.ListVerticesInfo.class); Tommaso 2014/1/17 Ammar Sahib <[email protected]> > Hi > > Thanks for your reply. I used now: > > conf.setClass("hama.graph.vertices.info > ",org.apache.hama.graph.ListVerticesInfo.class); > > Now I get this error: > The method setClass(String, Class<?>, Class<?>) in the type Configuration > is not applicable for the arguments (String, Class<ListVerticesInfo>) > > I am using HAMA 0.6.3 > > > > > > On Friday, January 17, 2014 12:59 PM, Tommaso Teofili < > [email protected]> wrote: > > you're passing the fully qualified name of the Class as a String to a > method setClass(String, Class) while you should pass the Class itself, > e.g.: > HamaConfiguration conf = new HamaConfiguration(); > conf.setClass("hama.graph.vertices.info",org.apache. > hama.graph.ListVerticesInfo.class); > > Hope this helps, > Tommaso > > > > > 2014/1/17 Ammar Sahib <[email protected]> > > > Hi > > > > I am trying to evaluate the different implementation below: > > > > > > - ListVerticesinfo: loads vertices into array list. > > - MapVerticesinfo: loads vertices into tree map. > > - DiskVerticesInfo: loads vertices into a local file. > > > > When using the conf.setClass method I got an error. Below is sample of my > > code: > > HamaConfiguration conf = new HamaConfiguration(); > > conf.setClass("hama.graph.vertices.info > > ","org.apache.hama.graph.ListVerticesInfo"); > > > > The error I am getting is: > > The method setClass(String, Class<?>, Class<?>) in the type Configuration > > is not applicable for the arguments (String, String). > > > > However I found that I can use conf.set method. > > > > > > Can someone tell me what is I am doing wrong? > > > > > > > > > > > > On Wednesday, January 15, 2014 8:01 AM, Tommaso Teofili < > > [email protected]> wrote: > > > > and OffHeapVerticesInfo for loading vertices off heap, which is available > > with 0.6.3 as well if I recall correctly. > > Tommaso > > > > > > > > 2014/1/15 Edward J. Yoon <[email protected]> > > > > > There are few implementations. > > > > > > - ListVerticesinfo: loads vertices into array list. > > > - MapVerticesinfo: loads vertices into tree map. > > > - DiskVerticesInfo: loads vertices into a local file. > > > > > > You can choose one of them by setting the "hama.graph.vertices.info" > > > in job configuration. > > > > > > > conf.setClass("hama.graph.vertices.info", > > > "org.apache.hama.graph.ListVerticesInfo". > > > > > > With the latest 0.6.3 version, you can use only ListVerticesInfo. > > > Please use the TRUNK. > > > > > > > > > On Tue, Jan 14, 2014 at 11:18 PM, Ammar Sahib <[email protected]> > > > wrote: > > > > Hi > > > > > > > > According to the BSP model, the data is processed in the RAM and that > > is > > > the reason why Pregel model is faster than the MapReduce (MapReduce > > > writedown to disk). Can someone explains to me how to be sure that all > > the > > > graph vertices are actually been loaded in RAM? > > > > > > > > > > > > How would HAMA behave if the vertices values are so big such that the > > > available RAM memory is not enough to contains all of the vertices? > > > > > > > > Regards > > > > > > > > > > > > -- > > > Best Regards, Edward J. Yoon > > > @eddieyoon > > > > > >
