QUESTION 2

a) Discuss the main differences between NoSQL databases and Relational databases? As part of your discussion, provide examples to support the differences you have identified.

b) Using an example and supporting diagram, briefly discuss Master/Slave replication. As part of your answer, highlight the benefits and drawbacks of this replication technique. Explain what happens when the Master node fails.

c) Riaks Key-Value store architecture uses a logical ring. Briefly discuss the structure of the ring and how it operates. Provide a diagram to support your discussion. As part of your answer, explain the significance of Consistent Hashing and the Hinted Hand-Off and why they are important in the successful operation of the ring