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Learning Neo4j 3.x - Second Edition by Rik Van Bruggen, Jérôme Baton

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Data redundancy

Data redundancy is a solution to prevent data loss. The data is copied from node to node, asynchronously and automatically.

When a user updates data, the update is dispatched on enough core servers, then dispatched to remaining core servers and replica servers. You will not want to have all your servers in the same room, because disasters happen.

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