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Cassandra High Availability by Robbie Strickland

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Chapter 3. Replication

Replication is perhaps the most critical feature of a distributed data store, as it would otherwise be impossible to make any sort of availability guarantee in the face of a node failure. As you learned in Chapter 1, Cassandra's Approach to High Availability, Cassandra employs a sophisticated replication system that allows fine-grained control over replica placement and consistency guarantees.

In this chapter, we'll explore Cassandra's replication mechanism in depth, including the following topics:

  • The replication factor
  • How replicas are placed
  • How Cassandra resolves consistency issues
  • Maintaining replication factor during node failures
  • Consistency levels
  • Choosing the right replication factor and consistency level

At the end of ...

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