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Distributed Systems Design

Designing for consistency, partitioning, consensus, and observability in serverless distributed systems.


Simple Explanation​

What it is​

This lesson explains how distributed systems behave when parts of the network are slow, down, or out of sync.

Why we need it​

Serverless systems often span regions and services. Understanding these tradeoffs prevents data corruption and downtime.

Benefits​

  • Better resilience under failure.
  • Clearer consistency choices for data.
  • More predictable recovery during outages.

Tradeoffs​

  • More complexity in design and testing.
  • Some delays are unavoidable at global scale.

Real-world examples (architecture only)​

  • Cross-region writes -> Delayed reads in another region.
  • Consensus quorum -> Service remains available with partial failure.

Replication lag Quorum consensus