4 Setting Up a Grid

A grid is a set of associated instances that contain the distributed data of one or more databases. There are two types of instances in a grid:

• Management instances control a grid and maintain the model, which is the central configuration of a grid. You can configure up to two management instances to provide availability for the management of the grid.

• Data instances store the data of every database managed by the grid.

These topics describe the tasks to set up a grid:

• Creating the Initial Management Instance

• Creating a Grid

• Adding the Standby Management Instance

• Calculating the Number of Hosts and Data Instances for the Grid

• Assigning Hosts to Data Space Groups

• Adding Data Instances

• Applying the Changes Made to the Model

• Setting Instances to Automatically Start at System Startup

Note:

• While this chapter describes the tasks necessary to completely configure a grid by using the command line and the ttGridAdmin utility, it is also possible to configure a grid by using Oracle SQL Developer. See Working with TimesTen Scaleout in Oracle TimesTen In-Memory Database SQL Developer Support User's Guide.

• Additionally, TimesTen Scaleout provides the ttGridRollout to quickly set up a simple grid with a single database for development and testing purposes. See ttGridRollout in Oracle TimesTen In-Memory Database Reference and Deploy a Grid and Database.