delete
The last Cassandra Sampler is Delete. Right click Thread Group -> Add -> Sampler -> CassandraDelete. This sampler lets you delete a single column given the rowid and column name. As always these can be any Jmeter or Random variable. The screenshot is below.
In the View Results Tree the Sampler result shows the Column that was deleted (righlighted in red in the screenshot below)
Note if the row does not exist the Delete will fail. Response data will indicate this
The jmx file for the delete experiment is here