Step 1: Plan the Clusters

Decide which nodes in the MapR cluster you want to run Drill, and which nodes you want to run the OJAI Distributed Query Service.

The nodes you select to run Drill can form one or more Drill clusters, while the nodes you select to run the OJAI Distributed Query Service can form another Drill cluster. You can configure multiple Drill clusters.

For example, if you have a ten node MapR cluster, you can configure one Drill cluster to run analytical queries and one OJAI Distributed Query Service cluster to run OJAI operational queries, as shown:

Note: Track the nodes that you want to group into a cluster, as this information is needed to configure node topology and volumes. Also note the memory requirements of each service.
Note: Only non-overlapping Drill clusters are supported. You cannot install more than one Drillbit on a MapR server node.