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The following table provides definitions for some of the terms that are used in this document.
Term | Definition |
Geo-federation | You can deploy ECS software in multiple data centers to create a geo-federation. In a geo-federation, ECS behaves as a loosely coupled federation of autonomous VDCs. Federating sites involves providing replication and management endpoints for communication between sites. After sites are federated, you can manage them as a single infrastructure from any node in the federation. |
Replication groups | Replication groups define where data is protected. A local replication group contains a single VDC and protects data within the same VDC against disk or node failures. Global replication groups contain more than one VDC, and protect data against disk, node, and site failures. Replication groups are assigned at the bucket level. |
Virtual data center (VDC) | In this paper, the term virtual data center (VDC) is used synonymously with site or zone. ECS resources in a single VDC must be part of the same internal management network. |