An HCP system can have at most five outbound links and at most twenty inbound links. An active/active link counts as both an outbound link and an inbound link. The ability for a single system to participate in multiple links enables HCP to support various replication topologies.
Replication can occur:
•In two directions on a single link between two HCP systems (active/active replication)
•In one direction on a single link between two HCP systems (active/passive replication)
•From multiple HCP systems to a single HCP system (many-to-one replication)
•From one HCP system to a second HCP system and from that second system to a third HCP system, such that the same HCP tenants and namespaces and default-namespace directories that are replicated to the second system are then replicated to the third system (chained replication)
•From one HCP system to multiple other HCP systems (one-to-many replication)
These configurations can be combined to form complex replication topologies.
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Note: A replication topology can include one or more HCP systems where the occurrences of a given namespace can contain metadata-only objects. If the service plan associated with the namespace does not include a metadata-only storage tier on only one system in the topology and the topology is being used for production purposes, the topology should include a disaster recovery system where the service plan associated with the namespace also does not include a metadata-only storage tier. For information about metadata-only objects, see |
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