Module 6: Distributed Consensus

Distributed Consensus

In a distributed system, ensuring data consistency and availability across multiple nodes is a fundamental challenge. This module explores MongoDB’s implementation of replica sets, automatic failover, and multi-document ACID transactions.

Learning Objectives

• Configure and manage Replica Sets for high availability.
• Understand the Raft-like election algorithm used by MongoDB.
• Implement fine-grained consistency using Read Preferences and Write Concerns.
• Execute multi-document ACID Transactions while understanding their performance implications.

Module Sections

1. Replica Sets & Elections: Architecture, failover mechanisms, and consensus.
2. Oplog & ACID Transactions: The replication log and multi-document atomicity.