Design Leader Election for a Worker Fleet · System Design Interview

Design Leader Election for a Worker FleetDesign how a fleet of identical processes agrees which one of them is currently doing the work that only one of them may do.What it has to do

Exactly one process acts as leader at a time

A leader that dies is replaced without anyone intervening

A process that has lost leadership stops acting as leader

Scale

Processes in the fleet: 200

Fleets electing independently: 3,000

Out of scope

The work the leader performs

Deployment and rollout

Metrics and dashboards

Practise this challengeAll system design challenges

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