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Cluster Migration Workflow


The migration workflow follows a list of tasks that must be performed in a specific order to make the Session State Register cluster server fully functional. This guide presents groups of related tasks in sequential order.

The high-level view of the migration has several groups of tasks:

  1. Planning—Because a SSR cluster involves four or more servers, planning the cluster topology and each server’s role and setting is essential. Planning is discussed, and a worksheet you can use to plan your installation is in Planning Your Session State Register Cluster.

  2. Creating a transition server—Setting up a transition server to temporarily provide cluster services while other servers are set up is discussed in this chapter. See Creating a Transition Server.

  3. Taking your existing cluster offline—After the transition server is handling traffic, the other nodes may be taken offline.

  4. Preparing—The tasks to complete and the information to gather on each server in a cluster before software can be installed are discussed in detail in Before You Install Software, and in the succeeding chapters that document the optional installation of Signalware that is required to support some features.

    Because this chapter was written for new installations rather than migration, some tasks may need to be completed out of order, but all need to be completed.

  5. Installing software—This includes completing preparatory steps that you were unable to complete while your existing servers were online, unpacking the SSR software package on all nodes, selecting configuration tasks, and providing settings used to set up the cluster servers. The preparatory steps are discussed in Before You Install Software; the actual software installation in Installing Session State Register Nodes.

  6. Configuring—Setting up configuration files for the SSR database is discussed in Customizing the SSR Database Current Sessions Table.

  7. Removing the Transition Server from Service—Taking the transition server offline and completing the cutover is discussed in this chapter. See Removing the Transition Server from Service.