[CASSANDRA-7127] Add command to reclaim disk space for dropped column families

• Type: New Feature
• Status: Resolved
• Priority: Low
• Resolution: Not A Problem
• Fix Version/s: 2.1 beta2
• Assignee: Unassigned
• Reporter: Bogdan Batranut
• Created: 30/Apr/14 22:41
• Updated: 16/Apr/19 09:31
• Resolved: 30/Apr/14 22:52

Description

I found out that after a DROP a column family's data is not deleted. I looked into the /data/keyspace dir and saw dirs corresponding to old columnfamilies that I have dropped in the past. I do see the benefit of taking snapshots when dropping but I can also see the need to reclaim disk space. During developent on a cluster that will be in production, people might push a lot of data into a columnfamily and change the definition for some reason. The old unused data will eat a lot of space.
So can you please implement a feature that will reclaim badly used disk space?

Thank you.