Understand cluster behaviour if a node runs out of disk space

We need to understand what happens to the cluster if a node runsout of disk space.

Key questions are:
1) will the node still service reads
2) Can the node be failed over
3) can the node be balanced out
4) do writes get accepted again once disk space if freed up

Primary focus should be on Membase nodes, but the experiment should be repeated with memcached buckets (where there is still logging traffic)