HLD - High Level System Design - Keerti Purswani

GammaDot

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Week-wise Curriculum

Week 1: Networking, Client and Server Protocols

Client - Server Protocol
Network Protocols
Monolith & Microservices
Websockets
SSEs
gRPC

Week 2: Servers, Scaling, Caching

Latency
Throughput
Consistency
Availability
CAP Theorem
Synchronous, Asynchronous
PubSub (Kafka, RabbitMQ)
Proxies
Load Balancers
Caching
Service Routing
Peer to Peer

Week 3: Storage, Databases, Migration, Indexing

Data Storage
SQL, NoSQL
Specialised Storage Paradigms
DB Migration
Indexing
Replication
Sharding
Consistent Hashing
Horizontal, Vertical Scaling

Week 4: System Design, APIs, Security, Logging & Monitoring

Capacity Estimation
Polling & Streaming
Configuration
Rate Limiting
Paging & Filtering
Resiliency
Failure & Fault Tolerance
Logging & Monitoring
API Design
Security

Week 5: Revision and Preparation

Chat App HLD (WhatsApp / Discord)
YouTube HLD
Uber HLD
Stock Broker HLD (Zerodha / Upstox)
Interview Prep Tips

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