You may want to look into CQL3 as I hear there may be a way to specify the query so only those rows are map/reduced. I am not sure if that is out yet or not but I remember someone from datastax telling me about it.
Dean On 12/11/12 9:46 AM, "Ayush V." <ayushv...@gmail.com> wrote: >I'm working on Cassandra Hadoop intergration (MapReduce). We have used >Random >Partioner to insert data to gain faster write. Now we have to read that >data >from cassandra in MapReduce and perform some calculation on it. > >From the lots of data we have in cassandra we wan't to fetch data only for >particular ROW-KEYs but we are unable to do it due to RandomPartioner - >assertion is there in code. > >Can anyone please guide me how should I filter data based on RowKey on >Cassandra level itself (I know data is distributed across regions using >Hash >of the RowKey)? > >Does using secondary indexes (still trying to understand how it works) >will >solve my problem or is there some other way around? > >I will be really appreciated if someone could answer my queries. > >Thanks >AV > > > >-- >View this message in context: >http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Filter-da >ta-on-row-key-in-Cassandra-Hadoop-s-Random-Partitioner-tp7584212.html >Sent from the cassandra-u...@incubator.apache.org mailing list archive at >Nabble.com.
