Riak Sets - a Riak based code base for handling sets

Building

To build this application type make release that will clean everything, then pull in any rebar dependencies, compile everything an build an erlang release. The release will be in the rel directory.

A node can be started and stopped with the script bin/rel/riak_sets.

Adding and removing nodes

To add a node to the ring, first ensure that all nodes have the same cookie, and can connect.

First start the node with riak_sets start.

Then add a new node with the script rel/bin/riak_sets-admin this is a several step process.

First you will use a join command to tell the system that you want to join a node (or several) to the ring. First do a join, you need to provide it with an existing cluster node here. Then you should review the plan with the command riak_sets-admin cluster plan, it will print out a plan for you to review. If it looks corerct do riak_sets-admin cluster commit

% riak_sets-admin cluster join <<NODE>>
% riak_sets-admin cluster plan
% riak_sets-admin cluster commit

If the riak_sets-admin script can also remove nodes, again you will need to view the plan and then commit.

Upgrading

Don't upgrade nodes in production, add new nodes to the ring with the new code, and then remove the old nodes. Ensure that riak has enough time to move all data off of old nodes before removing any from the cluster