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Part 2 · Module 18

Coordination and locking

Use leases and fencing safely, understand what election and consensus provide, and keep coordination small by choosing ownership and operations carefully.

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0 of 4 lessons25 min

18.1Locks, leases and fencingUp next7m

Coordination and locking · designlab

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The path

Part 2 · Module 18

Coordination and locking

Use leases and fencing safely, understand what election and consensus provide, and keep coordination small by choosing ownership and operations carefully.

Start

0 of 4 lessons25 min

18.1Locks, leases and fencingUp next7m

18.2

Leader election and consensus

18.3Practical coordination6m

18.4Optimistic concurrency and conditional writes6m

LabOne rider per order, one payout run per nightFinish “The payment provider slows down” first35m

Practice what this module teaches

Distributed Lock Service HLDCoordinate leases and fencing tokens without pretending expired owners stop executing.Advanced55 min Distributed Job Scheduler HLDSchedule durable jobs with leases, retries and safe recovery after worker crashes.Advanced55 min Fleet Configuration Rollout Service HLDDistribute immutable configuration revisions through canaries and observable rollout waves.Advanced55 min

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