How to bulkload into a specific data center?

I set up two virtual data centers, one for analytics and one for REST service. The analytics data center sits top on Hadoop cluster. I want to bulk load my ETL results into the analytics data center so that the REST service won't have the heavy load. I'm using CQLTableInputFormat in my Spark Applic

Is it possible to delete columns or row using CQLSSTableWriter?

CQLSSTableWriter only accepts an INSERT or UPDATE statement. I'm wondering whether make it accept DELETE statement. I need to update my cassandra table with a lot of data everyday. * I may need to delete a row (given the partition key) * I may need to delete some columns. For example, there are 2