The latter.
On Thu, Apr 21, 2011 at 1:24 AM, Constantin Teodorescu
braila...@gmail.com wrote:
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
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
