This is a thin wrapper of HFile.Writer. It only calls HFile.Writer#append(byte, byte)
when records are emitted. It only supports writing data into a single column family. Records MUST be sorted
by their column qualifier, then timestamp reversely. All data are written into a single HFile.
HBase's official HFileOutputFormat is not used, because it shuffles on row-key only and
does in-memory sort at reducer side (so the size of output HFile is limited to reducer's memory).
As crunch supports more complex and flexible MapReduce pipeline, we would prefer thin and pure
Nested Class Summary
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat