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Setting Up the Workflow Engine in an Active-Active Cluster Environment

If you have a cluster environment and you want to have more than one active Workflow Engine instance, you can set up additional instances of the Workflow Engine on the active node. This type of cluster environment is called an active-active cluster.

In an active-active cluster environment, each Workflow Engine instance that you install on the active node is treated as a separate active Workflow computer, even though all the Workflow Engine instances reside on the same physical node.

Active-active clusters are useful when you want to save hardware resources, because you can run additional Workflow Engine instances on the same physical node.

Before You Begin

Make sure that your cluster environment meets the following requirements:

  • You must have at least two physical computers configured in a Microsoft cluster.

  • You must have a set of shared drives that can be used by the cluster groups.

Procedure

  1. Install the first Workflow Engine instance on the physical nodes, first on the active node, and then on the passive node.

    For instructions, see Installing Server Packages in a Cluster Environment.

  2. Add the bAllowMultiInstances registry key on each of the physical nodes.

    The registry key will allow you to add more instances of the Workflow Engine on the same nodes. For instructions, see the Alternate Method steps in Enabling Multi-Instance Installations.

  3. Set up additional Workflow Engine instances on the physical nodes.

    Note: Perform the following steps for every additional Workflow Engine instance that you want to set up.

    1. Install a new instance of the Microsoft SQL Server software.

      For instructions, see Pre-Installing the Microsoft SQL Server Software on a Cluster Environment.

      During the installation, do the following:

      • On the Installation Type page, make sure to select the option that performs a new SQL Server installation.

      • The SQL Server installer creates a new cluster group using any of the available shared drives. Write down the cluster group name.

    2. Install a new instance of the Workflow Engine.

      For instructions, see Installing the Workflow Engine.

      During the installation, make sure to select the following options:

      • On the Install Instance Selection page, select Create a new instance.

      • On the Cluster Setup Install Option page, select the cluster group that was created during the installation of the new SQL Server instance.

Setting Up the CommServe Software in an Active-Active Cluster Environment

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