ArangoDB v3.9 reached End of Life (EOL) and is no longer supported.
This documentation is outdated. Please see the most recent version at docs.arangodb.com
Limitations
The Datacenter-to-Datacenter Replication setup in ArangoDB has a few limitations. Some of these limitations may be removed in later versions of ArangoDB:
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All the machines where the ArangoDB Server processes run must run the Linux operating system using the AMD64 architecture. Clients can run from any platform.
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All the machines where the ArangoSync Server processes run must run the Linux operating system using the AMD64 architecture. The ArangoSync command line tool is available for Linux, Windows & macOS.
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The entire cluster is replicated. It is not possible to exclude specific databases or collections from replication.
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In any DC2DC setup, the minor version of the target cluster must be equal to or greater than the minor version of the source cluster. Replication from a higher to a lower minor version (i.e., from 3.9.x to 3.8.x) is not supported. Syncing between different patch versions of the same minor version is possible, however. For example, you cannot sync from a 3.9.1 cluster to a 3.8.7 cluster, but you can sync from a 3.9.1 cluster to a 3.9.0 cluster.