datastax/spark-cassandra-connector — pull request #54 by pkolaczk (2014-07-13 06:09:18+00:00)
Title: CassandraConnector shares core driver Session objects. Previously it sha...

...red only Cluster objects and a separate Session was open per every Spark task. This had a significant performance overhead in terms of CPU, networking and memory use, because every Session object manages an internal pool of connections to all cluster nodes. Fixes #41 and #53.