If I remember it correctly, C* creates a snapshot when you drop a keyspace. Run 
the following command to get rid of the snapshot:
nodetool clearsnapshot

Mohammed
Author: Big Data Analytics with 
Spark<http://www.amazon.com/Big-Data-Analytics-Spark-Practitioners/dp/1484209656/>

From: Ted Yu [mailto:yuzhih...@gmail.com]
Sent: Wednesday, February 10, 2016 6:59 AM
To: user@cassandra.apache.org
Subject: reducing disk space consumption

Hi,
I am using DSE 4.8.4
On one node, disk space is low where:

42G     /var/lib/cassandra/data/usertable/data-0abea7f0cf9211e5a355bf8dafbfa99c

Using CLI, I dropped keyspace usertable but the data dir above still consumes 
42G.

What action would free this part of disk (I don't need the data) ?

Thanks

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