I forgot to set --tempDir parameter.
Issue Solved, thanks Pavel 15.11.12 15:43 пользователь "Abramov Pavel" <[email protected]> написал: >Hello! > >Trying to compute reduced rank matrix for recommendation system over >users (20*10^6) and their ratings (~150 000 items). > >How to avoid the exception with Q job? : >======================= >Exception in thread "main" java.io.IOException: Q job unsuccessful. >at org.apache.mahout.math.hadoop.stochasticsvd.QJob.run(QJob.java:230) >at >org.apache.mahout.math.hadoop.stochasticsvd.SSVDSolver.run(SSVDSolver.java >:377) >at >org.apache.mahout.math.hadoop.stochasticsvd.SSVDCli.run(SSVDCli.java:141) >======================= > >CLI parameters are: >======================= >mahout ssvd \ >-i /rec/sparse/tfidf-vectors/ \ >-o /rec/ssvd \ >-k 100 \ >--reduceTasks 100 \ >-ow >======================= >Using Mahout 0.7 on Hadoop with ~50 nodes (400 Mappers/300 reducers). > >My Input for SSVD is seq2sparse output, and there are 200 "Key class: >class org.apache.hadoop.io.Text Value Class: class >org.apache.mahout.math.VectorWritable" sequence files. 8GB total. > >Many thanks in advance, any suggestion is highly appreciated. I Don't >know what to do, CF produces inaccurate results for my tasks, SVD is the >only hope )) > >Regards, >Pavel > > > >
