> Have your tried it ?
yes, with a modified word count example a month or so ago. On Oct 20, 2010, at 3:27 AM, aaron morton wrote: > 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 >> >
