As per this thread http://stackoverflow.com/questions/10520110/how-do-i-delete-all-data-in-a-cassandra-column-family
What you can do to physically remove the files is to go to /var/lib/cassandra/data/keyspace_name and then manually delete the directory with the name of that column family. Do this on all the nodes On Apr 9, 2015 7:26 PM, "Eduardo Cusa" <eduardo.c...@usmediaconsulting.com> wrote: > Hi Guys, I truncated a column family that has a size of 31 gb, and the > disk space was not released > > what else do i have to do? > > Regards > Eduardo > >