After followed the NoSQL administrator's guide and installed NoSQL on my testing environment, I found that is only created 2 replication group.
I read the administrator's guide over and over and couldn't find how to increase the number of replication group. The guide only talk about how to identify the number of replication groups but no where it says how to set/change it.
The system decides on the number of replication groups automatically. In the current release, the decision is fairly simple: it depends on the number of Storage Nodes and the Replication Factor. For a given Replication Factor, having more Storage Nodes will tend to result in more groups.
For example, if you had nine Storage Nodes, and a Replication Factor of 3, the system would create 3 replication groups.