Failing Over a Replica
Data Backup and Recovery Solutions / Replication / Failing Over a Replica

This topic describes the process of failing over a replica. Objects stored in a replica are read-only, and failing over a replica moves the replicated objects to the live system. After a failover, all of the objects will appear in the system as if they had been created locally.

Prerequisites

A Delphix system that contains a replica is required.

For an overview of what replicas are and what failover implies, see Replicas and Failover.

For more information on configuring replication, refer to the Configuring Replication topics.

Procedure

  1. Locate the replica to failover.

    1. Click System.

    2. Select Replication.

      In the Received Replicas section, you will see the list of replicas. Each replica has a default name that is the hostname of the source that sent the update. If you wish, you can customize these names. Each replica will list the databases and environments it contains.

      If this replica is the result of a replication update, check to see whether or not the source Delphix appliance is still active. If it is still active, then disable any dSource or VDB that is part of the replica being failed over to ensure that only one instance is enabled. You can disable dSources and VDBs by selecting Databases > My Databases, finding the appropriate database, and toggling the Enabled slider.

  2. Click Failover and a confirmation dialog will appear (see screenshot "failover-confirm"). To accept the default failover behavior, confirm the dialog.

    This will pause while the replica is failed over.

  3. When failover completes, the replica page will update.
  4. Apply any configuration changes that are required to customize the objects for the system. This might include updating object state such as IP addresses, mount paths, or credentials. For more details, see the Replicas and Failover topic.
  5. Enable the environments that were failed over.
    1. Click Manage.
    2. Select Environments. The environments that were failed over will be disabled.
    3. Toggle the Disabled slider to enable them.
  6. Refresh any environments that were consolidated during failover.
    1. Click the Refresh icon for each affected environment.

  7. Enable the dSources and VDBs that were failed over.

    1. Click Databases.

    2. Select My Databases.

    3. Select the desired database.

    4. Toggle the Disabled slider to enable them.

      Policies and users are not replicated. Be sure to recreate them after you fail over.

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