Riak

Riak is a fault-tolerant, distributed database designed for scalability and use in the cloud. It is masterless, meaning there should be no single point of failure. It is designed for speed, simplicity, and stability. Riak is based on a paper by Amazon describing Dynamo, which is an internal, proprietary system owned by Amazon. The Riak Wiki describes the database in one place as “the most boring database you’ll ever run in production. No sharding required, just horizontal scaling and straightforward capacity planning. The same operational tasks apply to small clusters and large clusters. More machines does not mean more ops.”

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