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From Apache Wiki <wikidi...@apache.org>
Subject [Hama Wiki] Update of "SpMV" by Mikalai Parafeniuk
Date Sat, 18 Aug 2012 15:55:48 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hama Wiki" for change notification.

The "SpMV" page has been changed by Mikalai Parafeniuk:
http://wiki.apache.org/hama/SpMV?action=diff&rev1=12&rev2=13

  }}}
  After that you should copy these files to HDFS. If you don't feel comfortable with HDFS
please see [[http://hadoop.apache.org/common/docs/r0.20.0/hdfs_shell.html|this tutorial]].
After you have copied input matrix into `matrix-txt` and input vector into `vector-txt`, we
are ready to start. The following code snippet shows, how you can multiply matrices in this
mode. Explanations will be given below.
  {{{
- 1: jar hama-examples-0.6.0-SNAPSHOT.jar matrixtoseq /user/hduser/spmv/matrix-txt /user/hduser/spmv/matrix-seq
sparse 4
- 2: bin/hama jar hama-examples-0.6.0-SNAPSHOT.jar matrixtoseq /user/hduser/spmv/vector-txt
/user/hduser/spmv/vector-seq dense 4
- 3: bin/hama jar hama-examples-0.6.0-SNAPSHOT.jar spmv /user/hduser/spmv/matrix-seq /user/hduser/spmv/vector-seq
/user/hduser/spmv/result-seq 4
- 4: ../hadoop/bin/hadoop dfs -rmr /user/hduser/spmv/result-seq/part
- 5: bin/hama jar hama-examples-0.6.0-SNAPSHOT.jar matrixtotext /user/hduser/spmv/result-seq
/user/hduser/spmv/result-txt
- 6: ../hadoop/bin/hadoop dfs -cat /user/hduser/spmv/result-txt/part-00000
+ 1: hama jar $HAMA_EXAMPLES matrixtoseq $SPMV/matrix-txt $SPMV/matrix-seq sparse 4
+ 2: hama jar $HAMA_EXAMPLES matrixtoseq $SPMV/vector-txt $SPMV/vector-seq dense 4
+ 3: hama jar $HAMA_EXAMPLES spmv $SPMV/matrix-seq $SPMV/vector-seq $SPMV/result-seq 4
+ 4: hadoop dfs -rmr $SPMV/result-seq/part
+ 5: hama jar $HAMA_EXAMPLES matrixtotext $SPMV/result-seq $SPMV/result-txt
+ 6: hadoop dfs -cat $SPMV/result-txt/*
      0	 4 4 0 38.0 1 12.0 2 24.0 3 6.0
  }}}
  Line 1: Converting input matrix to sequence file format, internally consisting of `SparseVectorWritable`.<<BR>>

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