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The demise of eventual consistency?

A well written article by FoundationDB’s founder Dave Rosenthal about eventual consistency:

The concept of eventual consistency comes up frequently in the context of distributed databases. Leading NoSQL databases like Riak, Couchbase, and DynamoDB provide client applications with a guarantee of “eventual consistency”. Others, like MongoDB and Cassandra are eventually consistent in some configurations.

I could ignore some smart word choices and agree that dealing with eventual consistency is not a familiar area to many developers.

What I cannot agree with though, are weak statements like (what does unreliable writes mean?) :

Eventual consistency pushes the pain and confusion of inconsistent reads and unreliable writes onto software developers.

And definitely I cannot agree with unproved statements used solely to prove your point:

A system that keeps some, but not all, of its nodes able to read and write during a partition is not available in the CAP sense but is still available in the sense that clients can talk to the nodes that are still connected. In this way fault-tolerant databases with no single point of failure can be built without resorting to eventual consistency.

By changing the definitions, you are not proving a theorem is incorrect. Nor do you prove a different theorem.

Original title and link: The demise of eventual consistency? (NoSQL database©myNoSQL)

via: http://gigaom.com/2013/11/02/next-gen-nosql-the-demise-of-eventual-consistency/