HCP System Management Help


Active-passive one-to-many replication

In an active/passive one-to-many replication topology, one HCP system replicates to two or more other HCP systems using separate active/passive replication links. The replicating system is the primary system for each link. The other systems are replicas.

Typically, in an active/passive one-to-many replication topology, the replication links include different HCP tenants and namespaces and default-namespace directories.

If three systems need to have the same tenants, namespaces, and directories as each other, consider using a chained topology for them rather than a one-to-many topology. The one-to-many topology puts greater load on the single primary system than does a chained topology, which splits the load between the first and second systems in the chain.

In some cases, however, replicating the same tenants and namespaces to two different replicas in a one-to-many topology may be appropriate. For an example of this, see the description of the second use case in Active-passive one-to-many replication.

Note: You can also create a one-to-many replication topology that consists of a combination of active/passive and active/active links or even only active/active links.

What this looks like

The figure below shows an active/passive one-to-many replication topology in which one primary system (A) replicates to two replicas (B and C) over two separate replication links.

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