Partitioner

Now that you know how a hash ring works and how to manage group memberships, we can start thinking about mixing the two.

On one side, we have a group system that can tell us which nodes in our distributed system are live, and on the other side, we have an object that tells us which node handles a piece of data. By updating the hash ring members using the group system that Tooz offers, we can construct a new object called a partitioned group.

Instead of building that into each application, Tooz provides an API that can be leveraged while relying on both those mechanisms. The join_partitioned_group method allows an application to join a group in which all members share some workload using a consistent hash ring.