NoSQL, Cassandra and Cloud databases

Question

• NoSQL, Cassandra and Cloud databases use different approaches to guarantee validity of transactions

• what are examples for that different approaches ?

Answer 1

Cassandra uses eventual consistency and extends the concept with tunable consistency levels. The most common consistency level, and probably what most use cases should use is quorum consistency.

Quorum means a majority of the nodes agree on the data values being written or read. This provides strong read and write consistency and availability in the case of node failure.