Cassandra Practice Test

Question: 1 / 400

What trade-off is associated with the use of lightweight transactions in Cassandra?

They require additional storage space

They introduce higher latency compared to standard writes

Lightweight transactions in Cassandra utilize the Paxos consensus protocol to ensure atomicity and isolation for operations that require these characteristics. While this mechanism provides benefits such as ensuring that updates are not lost or improperly applied, it inherently involves additional communication between nodes to achieve consensus. This process increases the time taken to complete a transaction compared to standard writes, which are designed for high availability and speed without the need for such coordination.

The increased latency stems from the requirement to communicate with a majority of nodes in the cluster before a transaction can be considered successful. This coordination means that while lightweight transactions maintain data integrity, they do so at the cost of speed, making them slower than regular writes that do not require this level of consensus.

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They necessitate complex query structures

They limit the types of data that can be stored

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