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MapR-FS slow performance for FS ops

Question asked by jid1 on Apr 18, 2015
I have tried various file operations in MapR and the performance is very slow.
For example, reading a MapFile using the following command takes 20-30 seconds. As, HBase will be using similar calls, I would assume that maybe something is wrong. (The number of 'parts' is 280, but also tried with 16 parts)

Reader[] readers = MapFileOutputFormat.getReaders(new Path(file), new Configuration());

In the above context, is there a 'cheap' way of combining SequenceFiles/MapFiles in MapR ?
i.e. not by setting the reducers to 1 or doing a Local merge.