Thank you very much Ellis, I heard about Brisk two weeks ago and I'm already checking DataStax web site twice a day waiting for Brisk to come. It seems that it will be a good solution for us.
Once more question please: the Brisk way of operation need to transfer intermediate data from Cassandra storage to some sort of Hadoop storage? Or it's just like that: [ Cassandra data ] --> [ Hadoop Job Tracker ] --> [ Parallel N-nodes MapReduce Task ] --> [ Cassandra storage for temporary results ] --> [ Final 1-Node ReReduce Task ] --> [ Cassandra storage for final results ] Thank you for your time, Teo On Thu, Apr 21, 2011 at 5:38 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > You want to run map/reduce jobs for your use case. You can already do > this with Cassandra (http://wiki.apache.org/cassandra/HadoopSupport), > and DataStax is introducing Brisk soon to make it easier: > http://www.datastax.com/products/brisk > > On Wed, Apr 20, 2011 at 9:36 PM, Jonathan Ellis <jbel...@gmail.com> wrote: > > CQL changes the API, that is all. > > > > On Wed, Apr 20, 2011 at 5:40 PM, Constantin Teodorescu > > <braila...@gmail.com> wrote: > >> My use case is as follows: we are using in 70% of the jobs information > >> retrieval using keys, column names and ranges and up to now, what we > have > >> tested suits our need. > >> However, the rest of 30% of the jobs involve full sequential scan of all > >> records in the database. > >> I found some web pages describing the next good thing for cassandra 0.8 > >> release, CQL, and I'm wondering: the CQL execution will involve separate > >> processes running simultaneously on all nodes in the cluster that will > do > >> the "filtering and pre-sorting phase" on the local stored data (using > >> indexes when available) and then execute the "merge phase" on a single > node > >> (that one that have received the request) ? > >> Best regards, > >> Teo > >> > > > > > > > > -- > > Jonathan Ellis > > Project Chair, Apache Cassandra > > co-founder of DataStax, the source for professional Cassandra support > > http://www.datastax.com > > > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com >
