This ticket is the top-level of any bugs/feature requests that effectively depend on Node 'cluster' support to realistically be implemented in the Node driver.

Note that at the time of writing, Node cluster support is "unstable" and thus impossible to implement reliably (https://nodejs.org/api/cluster.html#cluster_cluster)

One day in the future when clustering support in Node matures and becomes "stable", it will become possible for the MongoDB Node driver to support connection pooling across child processes. This ticket is to describe all the other possibilities that become available on that day.