How to use MapFile in mapreduce

[Asif Jan]

Hi

any pointers on how to use the MapFile with new mapreduce API.
I did find the correspondinf output format e.g.  
org.apache.hadoop.mapreduce.lib.output.MapFileOutputFormat, but was  
not able to see how I can specify MapFileInputFormat ?  (naively I  
thought that  
org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
 should work for MapFile as well)

will I have to implement RecordReader in order to read from a MapFile ?

Thanks