Thanks Sylvain,

I am getting errors in nodetool. Strange it wants -ks (which I assume is keyspace) then when I try I get following error.

C:\servers\apache-cassandra-1.2.5\bin>nodetool rebuild_index -host localhost -ks video -cf videos
Starting NodeTool
Unrecognized option: -ks
usage: java --host <arg> <command>

What am I doing wrong? Is there good documentation somewhere with command line example?


From: Sylvain Lebresne <>
To: "" <>; Tony Anecito <>
Sent: Friday, July 5, 2013 3:12 AM
Subject: Re: How to build indexes?

Creating a secondary index will trigger the build of that index automatically.

However, that built is done asynchronously and can take some time if you have lots of existing data to index. To know when that building is done, you can check the nodes log for an entry looking like "Index build of <index_name> complete" (you can also check the IndexInfo system table (SELECT * FROM system."IndexInfo", the quotes matter for backward compatibility reason), a row for the new index will appear in that table when it's built).

You can also force a rebuild however if you want using nodetool rebuild_index.

On Fri, Jul 5, 2013 at 4:36 AM, Tony Anecito <> wrote:
Hi All,

I updated a table with a secondary index. I discovered using CLI describe that the index was not built.

How do I build an index after I have altered an existing table with data?

I looked at nodetool and cli and saw no command that had the word build index associated with it. And most of the postings I have found so far cover creating an index but not building it or verifying the index was built.