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From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Resolved] (CASSANDRA-7127) Add command to reclaim disk space for dropped column families
Date Wed, 30 Apr 2014 22:54:14 GMT


Jonathan Ellis resolved CASSANDRA-7127.

    Resolution: Not a Problem

You can set auto_snapshot: false if you want to turn this behavior off entirely; otherwise,
nodetool clearsnapshot will allow this post-CASSANDRA-6281

> Add command to reclaim disk space for dropped column families
> -------------------------------------------------------------
>                 Key: CASSANDRA-7127
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Bogdan Batranut
>            Priority: Trivial
>             Fix For: 2.1 beta2
> 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.

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