There is a single point of failure for sure as there is a single proxy in front but that pays off as the load is even between nodes. Another plus is when a machine is out of the cluster for maintenance the proxy handles that automatically. Originally I started it as an experiment, there is a large number of long running clients and using a proxy was an easy way to reduce configuration.
On Tue, Feb 15, 2011 at 11:45 PM, Matthew Dennis <mden...@datastax.com> wrote: > You have a single HAProxy node in front of the cluster or you have a HAProxy > node on each machine that is a client of Cassandra that points at all the > nodes in the cluster? > > The former has a SPOF and bottleneck (the HAProxy instance), the latter does > not (and is somewhat common, especially for things like Apache+PHP).
