How to know the size of a keyspace and column family in Cassandra?

Question

Recently I\'ve started working on Grails integration with Cassandra using the Java driver for cassandra(cassandra-driver-core-2.0.2). So I was curious to know how we can find ou

Answer 1

To get the statistics regarding column families in Cassandra with respect to keyspaces or tables, you can simply run the below command:

nodetool cfstats

Result: This will return the complete statistics related to available keyspaces.

But, in case you want to find out the statistics of specific keyspaces or tables, run below command:

For Keyspace(s) : nodetool cfstats OR nodetool cfstats -H

For Table(s) : nodetool tablestats . OR nodetool tablestats -H .

Note: -H denotes Human Readable format

For more details please refer, nodetool cfstats

Findings:

1. You might see SSTable count as 0

2. Space used (live) and Space used (total) as 0 bytes

To know WHY(s) of the above two findings please refer: Reason of why SSTable count shown as 0