Simple active/passive replication

In a simple active/passive replication topology, one HCP system, the primary system, replicates HCP tenants and namespaces and default-namespace directories to another HCP system, the replica, over an active/passive link. The items being replicated are originally created only in the primary system. The items are read-write on the primary system and, after being replicated, read-only on the replica.

What this looks like

The figure below shows a simple active/passive replication topology in which one HCP system (A) is replicating to a second HCP system (B).

In this figure:

From system A, two of three locally created tenants are being replicated to system B. In the first tenant being replicated, two of three namespaces are selected for replication. In the second tenant being replicated, one of two namespaces is selected for replication.

In system B, no locally created tenants are being replicated.

Uses

The main purpose of a simple active/passive replication topology is to have a backup of the primary system for use in disaster recovery. However, this topology also supports a scenario in which some applications need read-write access to the replicated items while other applications need only read access. By directing requests from the latter to the replica, you can reduce the load on the primary system.

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