advanced~4h
Distributed Systems — Replication, Partitioning & Consistency
Understanding distributed database concepts is essential for designing scalable systems and answering architecture interviews. These concepts underpin all NoSQL databases.
Learning objectives
- Distinguish leader-based replication from leaderless replication, and name a system representative of each.
- Explain what a quorum guarantees mathematically, and derive the condition under which it guarantees strong consistency.
- Describe two concrete failure scenarios (network partition, node crash) and how a well-designed distributed system responds to each.
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Distributed Systems — Replication, Partitioning & Consistency