Joe, Even I tried with reducing the number of countries in the country.txt. That didn't help. And in my case, I was monitoring the disk space and at no time did it reach 0%. So, I am not sure if that is the case. To remove the dependency on the number of countries, I even tried with the subjects.txt as the classification - that also did not help. I think this problem is due to the type of the data being processed, but what I am not sure of is what I need to change to get the data to be processed successfully.
The experienced folks on Mahout will be able to tell us what is missing I guess. Thank you Gangadhar On Sun, Sep 19, 2010 at 8:06 AM, Joe Kumar <[email protected]> wrote: > Gangadhar, > > I modified $MAHOUT_HOME/examples/src/test/resources/country.txt to just have > 1 entry (spain) and used WikipediaDatasetCreatorDriver to create the > wikipediainput data set and then ran TrainClassifier and it worked. when I > ran TestClassifier as below, I got blank results in the output. > > $MAHOUT_HOME/examples/target/mahout-examples-0.4-SNAPSHOT.job > org.apache.mahout.classifier.bayes.TestClassifier -m wikipediamodel -d > wikipediainput -ng 3 -type bayes -source hdfs > > Summary > ------------------------------------------------------- > Correctly Classified Instances : 0 ?% > Incorrectly Classified Instances : 0 ?% > Total Classified Instances : 0 > > ======================================================= > Confusion Matrix > ------------------------------------------------------- > a <--Classified as > 0 | 0 a = spain > Default Category: unknown: 1 > > I am not sure if I am doing something wrong.. have to figure out why my o/p > is so blank. > I'll document these steps and mention about country.txt in the wiki. > > Question to all > Should we have 2 country.txt > > 1. country_full_list.txt - this is the existing list > 2. country_sample_list.txt - a list with 2 or 3 countries > > To get a flavor of the wikipedia bayes example, we can use > country_sample.txt. When new people want to just try out the example, they > can reference this txt file as a parameter. > To run the example in a robust scalable infrastructure, we could use > country_full_list.txt. > any thots ? > > regards > Joe. > > On Sat, Sep 18, 2010 at 8:57 PM, Joe Kumar <[email protected]> wrote: > >> Gangadhar, >> >> After running TrainClassifier again, the map task just failed with the same >> exception and I am pretty sure it is an issue with disk space. >> As the map was progressing, I was monitoring my free disk space dropping >> from 81GB. It came down to 0 after almost 66% through the map task and then >> the exception happened. After the exception, another map task was resuming >> at 33% and I got close to 15GB free space (i guess the first map task freed >> up some space) and I am sure they would drop down to zero again and throw >> the same exception. >> I am going to modify the country.txt to just 1 country and recreate >> wikipediainput and run TrainClassifier. Will let you know how it goes.. >> >> Do we have any benchmarks / system requirements for running this example ? >> Has anyone else had success running this example anytime. Would appreciate >> your inputs / thots. >> >> Should we look at tuning the code for handling these situations ? Any quick >> suggestions on where to start looking at ? >> >> regards, >> Joe. >> >> >> >> >
