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Availability and multi-region · designlab

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Part 2 · Module 22

Availability and multi-region

Measure availability with SLOs and error budgets, remove single points of failure, plan recovery with RPO and RTO, and run across regions.

0 of 4 lessons22 min

22.1Measuring availabilityUp next5m
22.2Redundancy, failover and recovery5m
22.3Running in multiple regions6m
22.4Testing for failure6m
LabA region goes down at lunchFinish “The live kitchen dashboard” first35m

Practice what this module teaches

Multi-region Failover HLDDefine write ownership, recovery objectives and split-brain prevention across regions.Advanced55 min Cross-region Object Replication HLDReplicate immutable object generations with checksums, delete markers and fenced failover.Advanced60 min Backup and Restore Platform

HLD

Create verifiable recovery points and prove they restore in an isolated environment.

Advanced55 min

Authentication Session Service HLDManage device sessions, refresh-token rotation and bounded revocation delays.Advanced55 min