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Posted to user@mahout.apache.org by Colum Foley <co...@gmail.com> on 2013/03/01 12:22:53 UTC
Elephant-Bird SequenceFileStorage VectorWritable Producing Empty Vectors
I am trying to store Mahout RandomAccessSparseVector using
elephant-bird and pig. The data is of the form
key(text),value(RandomAccessSparseVector). when I run pig describe it
presents the following:
pair: {key: int,val: (cardinality: int,entries: {entry: (index:
int,value: double)})}
My problem is that when I try to store tuples using elephant-bird's
SequenceFileStorage as follows:
store clusteredOut into 'logsvectors.dat' using
com.twitter.elephantbird.pig.store.SequenceFileStorage (
'-c com.twitter.elephantbird.pig.util.TextConverter',
'-c com.twitter.elephantbird.pig.mahout.VectorWritableConverter -- -sparse'
);
It runs successfully but when I examine the resulting Sequencefile all
the vectors are empty.
On the other hand, if I run the following instead:
store clusteredOut into 'logsvectors.dat' using
com.twitter.elephantbird.pig.store.SequenceFileStorage ();
ie do not specify the types of the key or value.
The vectors are non-empty but are of type text..and this causes my
clustering algorithm to fail(as they are expecting VectorWritable).
So my problem is that I need to output in VectorFileFormat, but when I
do the resulting vectors are empty.
Anyone else have experience with this issue?
Many thanks,
Colum