LLD Hub
System Design Mastery
Fundamentals
What is System Design?Functional vs Non-functionalCore Performance MetricsRequest LifecycleThe Scaling Mindset
Database FundamentalsDatabase IndexingRead vs Write PatternsCaching StrategiesCache EvictionObject Storage & CDNDatabase Isolation LevelsChoosing the Right Database
Load BalancersPopularLB AlgorithmsHealth Checks & FailoverRate LimitingThrottling & Load Shedding
Message QueuesProducer-Consumer PatternConsumer GroupsRetry StrategiesEvent-Driven ArchitectureStream Processing
Vertical vs HorizontalDatabase ReplicationSharding & PartitioningStateless ServicesSession ManagementAuto-scalingHigh Availability
Monolith vs MicroservicesAPI GatewayService DiscoveryCircuit Breaker
Consistency ModelsCAP TheoremIdempotency
Logging Best PracticesDistributed Tracing
REST, GraphQL, gRPCWebSockets & SSENetworking Basics
Practice Problems
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