My understanding of the Hadoop integration is not great but from what I can see. The code in o.a.c.hadoop.ColumnFamilyRecordReader does not use a super_column in the ColumnParent struct when making the get_range_slices() call. It's just using the ColumnFamily.
So I would guess it would include super columns if they were present. And that the IColumns passed to your map function will be instances of o.a.c.db.SuperColumn. Have your tried it ? Aaron On 20 Oct 2010, at 04:44, Jeremy Hanna wrote: > It's relatively straightforward, the current mapper gets a map of column > names to IColumns. The SuperColumn implements the IColumn interface. So you > would probably need both the super column name and the subcolumn name to get > at it, but you just need to cast the IColumn to a super column and handle it > from there. > > On Oct 19, 2010, at 10:31 AM, Frank LoVecchio wrote: > >> I have a Hadoop installation working with a cluster of 0.7 Beta 2 Nodes, and >> got the WordCount example to work using the standard configuration. I have >> been inserting data into a Super Column (Sensor) with TimeUUID as the >> compare type, it looks like this: >> >> get Sensor['DeviceID:Sensor'] >> => (super_column=795a4da0-d8ac-11df-9a2c-12313d06187c, >> (column=sub_sensor1, value=39.742538, timestamp=1287182112633000) >> (column=sub_sensor2, value=-104.912474, timestamp=1287182112633000) >> (column=mac_address, value=DEADBEEFFEED, timestamp=1287182112633000)) >> >> Is there a Word Count example for super columns? I am trying to count the >> number of occurrences of "DEADBEEFFEED", much like "word1" in the column >> example. >> >> Thanks, >> >> Frank LoVecchio >> Software Engineer, Isidorey LLC >> isidorey.com >> >> franklovecchio.com >> rodsandricers.com >
