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From Mike Peters <>
Subject Re: Using elasticsearch on cassandra nodes
Date Mon, 24 Oct 2011 11:39:10 GMT

We've taken the same approach, with ElasticSearch running on the same 
nodes as Cassandra.

Make sure you have enough memory on your nodes, because ElasticSearch 
and Cassandra both love memory.

We started with 12gb of memory, allocating ElasticSearch and Cassandra 
5gb each and it wasn't enough.  We ended up upgrading to 48gb of memory, 
allocating 15gb to Cassandra, 15gb to ElasticSearch and haven't had any 
issues since.

Mike Peters

On 10/18/2011 9:14 AM, Brian O'Neill wrote:
> Anthony,
> We've been looking at elastic search as well.  Presently we have SOLR 
> in place, but it is cumbersome dealing with SOLR schemas when indexing 
> information out of Cassandra (since you can't anticipate all the 
> columns ahead of time).
> What are you using as your bridge between Cassandra and ES?  Are you 
> developing a Cassandra river?
> -brian
> On Mon, Oct 17, 2011 at 5:29 PM, Anthony Ikeda 
> < <>> wrote:
>     I've already posted to the elasticsearch groups and thought it
>     prudent to also ask here.
>     We are looking at using elastic search to index our data that
>     we currently store to Cassandra. I was wondering if there are
>     any concerns running elastic search on the same nodes that we use
>     for Cassandra? We have a ring of 6 nodes (2 DCs each with 3 nodes)
>     I was thinking of installing elastic search on 2 nodes in each
>     datacentre - maybe all three. The only reason I'd use the same
>     infrastructure would be because we have the distributed visibility
>     already in place.
>     Has anyone else taken this approach? Pros? Cons?
>     Anthony
> -- 
> Brian ONeill
> Lead Architect, Health Market Science (
> mobile:215.588.6024
> blog:
> blog:

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