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From Dave Viner <>
Subject Re: Virtual IP / hardware load balancing for cassandra nodes
Date Mon, 20 Dec 2010 16:44:17 GMT
You can put a Cassandra cluster behind a load balancer.  One thing to be
cautious of is the health check.  Just because the node is listening on port
9160 doesn't mean that it's healthy to serve requests.  It is required, but
not sufficient.

The real test is the JMX values.

Dave Viner

On Mon, Dec 20, 2010 at 6:25 AM, Jonathan Colby <>wrote:

> I was unable to find example or documentation on my question.  I'd like to
> know what the best way to group a cluster of cassandra nodes behind a
> virtual ip.
> For example, can cassandra nodes be placed behind a Citrix Netscaler
> hardware load balancer?
> I can't imagine it being a problem, but in doing so would you break any
> cassandra functionality?
> The goal is to have the application talk to a single virtual ip  and be
> directed to a random node in the cluster.
> I heard a little about adding the node addresses to Hector's load-balancing
> mechanism, but this doesn't seem too robust or easy to maintain.
> Thanks in advance.

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