Share database domains between clusters on IBM i

To help provide redundancy and failover support in production environments composed of multiple clusters in a single cell and multiple clusters in different cells, we can share database domains between those clusters. IBM WebSphere Portal data is organized into different database domains, with different availability requirements depending on how the production environment is set up. When multiple lines of production are involved and each line of production is implemented as a cluster of servers, sharing database domains ensures that the data is automatically synchronized across the lines of production.

Prerequisites

Prepare the IBM i operating system in a clustered environment

Prepare the primary node on IBM i

Create and augment a new dmgr profile on IBM i

Prepare additional cluster members on IBM i

IBM i cluster: Tune the servers

Important: JCR domains and release domains cannot be shared between different clusters or servers. Each distinct cluster or server in the environment must use a separate JCR domain and a separate release domain.

For example:

of separate JCR or Release domains between all clusters or servers

Development Server	Authoring Cluster	Staging Server	Delivery Cluster
JCR Domain 1	JCR Domain 2	JCR Domain 3	JCR Domain 4
Release Domain 1	Release Domain 2	Release Domain 3	Release Domain 4

Share database domains when setting up an environment with multiple clusters:

1. Set up the first cluster (referred to as Cluster A in these instructions).

2. Determine which database domains to share with any other clusters in the environment.

3. Install the primary node of the next cluster (Cluster B), and complete the following steps to configure the node to use the shared database domains.

   1. Complete a partial database transfer of the database domains that we are not sharing.

      For example, if we are sharing only the Customization and Community domains, you would transfer the remaining domains to the database we are using for Cluster B.

   2. Re-configure the shared database domains on the node to connect to the shared database domains we are using for Cluster A.

      For example, to connect to the Customization and Community domains for Cluster A, you would connect to those domains from Cluster B.

4. Continue setting up the primary node as described in the cluster instructions.

5. Install the secondary node of Cluster B, and complete the following steps to configure the node to use the shared database domains.

   1. For those database domains that we are not sharing between clusters, re-configure the domains to connect to the database domains we are using for Cluster B.

      As in the example for the primary node, if we are sharing only the Customization and Community domains, re-configure the remaining domains on the secondary node to use the domains of the primary node for Cluster B.

   2. Re-configure the shared database domains on the node to connect to the shared database domains we are using for Cluster A.

      For example, to connect to the Customization and Community domains for Cluster A, you would connect to those domains from Cluster B.

6. Continue setting up the secondary node as described in the cluster instructions.

Parent: Set up a cluster on IBM i
Previous: Set up multiple clusters on IBM i
Related:
Connect to existing database domains