I'm currently writing collected data continuously to Cassandra, having keys starting with a timestamp and a unique identifier (like 2009.01.01.00.00.00.RANDOM) for being able to query in time ranges.
I'm thinking of running periodical mapreduce jobs which will go through a designated time period. I might want to analyze the data only between 2009.01 and 2009.02. I had done this previously with HBase however I thought cassandra would be a better choice for continuously storing data in a safe manner. I guess this briefly explains my designated use case. Best Regards, Utku On Thu, Apr 29, 2010 at 11:32 PM, Jonathan Ellis <jbel...@gmail.com> wrote: > It's technically possible but 0.6 does not support this, no. > > What is the use case you are thinking of? > > On Thu, Apr 29, 2010 at 11:14 AM, Utku Can Topçu <u...@topcu.gen.tr> > wrote: > > Hi, > > > > I've been trying to use Cassandra for some kind of a supplementary input > > source for Hadoop MapReduce jobs. > > > > The default usage of the ColumnFamilyInputFormat does a full columnfamily > > scan for using within the MapReduce framework as map input. > > > > However I believe that, it should be possible to give a keyrange to scan > the > > specified range. > > > > Is it anymeans possible? > > > > Best Regards, > > > > Utku > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of Riptano, the source for professional Cassandra support > http://riptano.com >
