There were a few threads about this in the old forum.
http://archive.jamroom.net/phpBB2/viewtopic.php?t=42235&highlight=jr5+cluster
http://archive.jamroom.net/phpBB2/viewtopic.php?t=42539&highlight=cluster
http://archive.jamroom.net/phpBB2/viewtopic.php?t=42568&highlight=jr5+cluster
and some others.
The short answer is there is no cluster in JR5.
Quote: [ there are ] plans to allow you to store your media on S3 so it will run in a distributed mode (i.e. multiple JR5 front ends behind a load balancer) so you can scale. 80% of that work is actually already complete, as the media "system" in JR5 is plug in based, but there's some shortcuts that were taken to get JR5 released that I need to go back and expand on so it will work throughout.
For now I would highly recommend something like Digital Ocean - with their SSD's JR5 runs pretty darn good.
Quote: both servers would be identical, with each handling 1/2 the incoming requests. The load balancer would responsible for distributing the requests to the servers. The JR servers would not communicate with each other.
More info on this will come in the future - I'm not able to get into any real details at this time, as it is not supported currently, and things can certainly change.