Sharded Cluster Test ArchitectureΒΆ


Use the test cluster architecture for testing and development only.

For testing and development, you can deploy a sharded cluster with a minimum number of components. These non-production clusters have the following components:

  • A replica set config server with one member.

    Changed in version 3.2: Starting in MongoDB 3.2, config servers for sharded clusters can be deployed as a replica set. The replica set config servers must run the WiredTiger storage engine. MongoDB 3.2 deprecates the use of three mirrored mongod instances for config servers.

  • At least one shard. Shards are either replica sets or a standalone mongod instances.

  • One mongos instance.

Diagram of a sample sharded cluster for testing/development purposes only.  Contains only 1 config server, 1 ``mongos`` router, and at least 1 shard. The shard can be either a replica set or a standalone ``mongod`` instance.

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