Object, Block, File Storage and Large File Upload

All videos (60)

• FreeVideo 1What is System Design: from a small shop to FlipkartRiya's small online shop grows from one server to a large system: load balancer, cache, CDN, DNS, WAF, queue and microservices, and why each piece arrives.+
• Video 2Network basics: TCP vs UDP, HTTP/1.1 vs 2 vs 3How data travels over the wire, how HTTP evolved, keep-alive and connection reuse.+
• Video 3DNS and GeoDNSDomain to IP, TTL, latency routing and health-check failover.+
• Video 4CDN: Content Delivery NetworkEdge cache, HIT and MISS, origin shield, purge and the Hotstar IPL example.+
• Video 5Load Balancer: L4 vs L7 and algorithmsSplitting traffic across many servers, algorithms and health checks.+
• Video 6Reverse Proxy and API GatewayA receptionist in front of the backend: auth, routing, rate limiting.+
• Video 7Scaling and Stateless ServersVertical vs horizontal, auto-scaling, and keeping sessions in Redis or JWT.+
• Video 8Rate Limiting and ThrottlingHow many requests per time window, algorithms and 429 Too Many Requests.+
• Video 9DDoS, WAF and Bot ProtectionStopping fake traffic, SQL injection, XSS and bots right at the edge.+
• Video 10Caching: Redis vs Memcached and cache patternsCache-aside, write-through, write-back and read-through.+
• Video 11Cache Eviction, Invalidation, TTL and StampedeWhat to keep in cache, when to evict it, and avoiding a simultaneous load on the DB.+
• Video 12SQL vs NoSQL: which database, and whenChoosing a database based on data shape, scale and consistency.+
• Video 13Indexing and Query OptimizationMaking the DB fast with the right index, the right query and connection handling.+
• Video 14Replication and Read ReplicasSpreading reads, failover and replication lag.+
• Video 15Sharding and Consistent HashingSplitting a big DB into pieces, and moving less data when servers are added or removed.+
• Video 16CAP, PACELC and Consistency ModelsWhen the network breaks, do you need consistency or availability.+
• Video 17Transactions: ACID, 2PC, Saga, OutboxMulti-step work either completes fully or not at all.+
• Video 18Object, Block, File Storage and Large File UploadS3-style storage, multipart and resumable upload, presigned URLs.+
• Video 19Image and Video Processing and StreamingTranscoding, HLS and DASH, adaptive bitrate.+
• Video 20Search Engine and AutocompleteFull-text search, inverted index and typeahead in 100 ms.+
• Video 21Data Warehouse, ETL and Big DataData from all systems in one place: reports, dashboards and ML.+
• Video 22Recommendation Systems and A/B TestingPersonalization, and proving that a new feature is really better.+
• Video 23Message Queue vs Pub/Sub vs Event StreamingOne consumer, a copy to every subscriber, or a replayable log.+
• Video 24Kafka: an Event Streaming deep diveTopics, partitions, consumer groups and offsets.+
• Video 25Background Jobs and Task SchedulingTasks like email, reports and resizing go to workers, and fixed-time jobs to a scheduler.+
• Video 26Real-time: WebSocket vs SSE vs Long PollingServer push for chat, live scores and location.+
• Video 27Monolith vs Microservices, Service Discovery and ConfigWhen to split, how services find each other, and where settings come from.+
• Video 28API Design: REST vs gRPC vs GraphQL, and BFFHow services talk to each other, and a thin backend layer for each client.+
• Video 29Timeouts, Retries, Backoff and Circuit BreakerKeeping one slow service from bringing down the whole system.+
• Video 30Idempotency and Exactly-once ProcessingA request arrives 10 times, but the result is applied only once.+
• Video 31High Availability, Multi-Region and Disaster RecoveryKeeping the site up and data safe even when a server, data center or region goes down.+
• Video 32Distributed Locking, Leader Election and ConsensusRaft, Paxos, Quorum and Gossip: how many servers agree on one thing.+
• Video 33Unique ID GenerationGiving every order and message a unique ID across thousands of servers without clashes.+
• Video 34Flash Sale: Concurrency, Backpressure and Load SheddingPreventing overselling, and keeping core features running even under overload.+
• Video 35Authentication and AuthorizationWho you are vs what you can do: sessions, JWT, OAuth, RBAC.+
• Video 36Encryption, HTTPS/TLS and Secrets ManagementData in transit and at rest, and keeping keys in a vault outside the code.+
• Video 37Observability: Logging, Monitoring, Alerting and TracingWatching system health through logs, metrics and traces.+
• Video 38Containers and OrchestrationDocker and Kubernetes: pack, scale and self-heal.+
• Video 39CI/CD, Deployment Strategies and Infrastructure as CodeBlue-green, canary, rolling deploys, and infrastructure as code.+
• Video 40Load Testing, Performance Testing and Chaos EngineeringSimulated traffic before a sale, and deliberate failures.+
• Video 41Web Performance: Compression, Caching Headers, SSR vs CSR vs SSGGetting the page to open quickly on the user's phone.+
• Video 42CQRS and Event SourcingSeparate models for reads and writes, and every change as an event.+
• Video 43Probabilistic Data StructuresBloom Filter, HyperLogLog and Count-Min Sketch: approximate answers in little memory.+
• Video 44Geo-spatial: Geohash, Quadtree, S2 and H3Answering "who is within 2 km of me" style queries in milliseconds.+
• Video 45Specialised Databases and Zero-downtime MigrationTime-series, graph, NewSQL, wide-column, and changing the schema of a live DB.+
• Video 46Fraud Detection and Risk EngineA real-time risk score: allow, OTP or block.+
• Video 47Compliance, Data Privacy and Multi-tenancyDPDP, GDPR, PCI-DSS, data localisation, and tenant data isolation.+
• Video 48Cloud Cost Optimization and FinOpsCutting the cloud bill without hurting performance.+
• Video 49Interview Framework and Back-of-the-envelope EstimationRequirements, numbers, API, data model, architecture, deep dive, trade-offs.+
• Video 50Case Study: Amazon and Flipkart E-commerceCheckout saga, flash sale with Redis Lua, idempotency.+
• Video 51Case Study: URL ShortenerID generation, redirect path and cache.+
• Video 52Case Study: WhatsApp ChatWebSocket, delivery receipts and offline messages.+
• Video 53Case Study: Instagram and Twitter News FeedFan-out on write vs read, and the celebrity problem.+
• Video 54Case Study: YouTube and Hotstar Video StreamingUpload pipeline, transcoding and live spikes.+
• Video 55Case Study: Uber and SwiggyLocation updates, nearby search and matching.+
• Video 56Case Study: IRCTC Tatkal BookingExtreme spike, waiting room and seat locking.+
• Video 57Case Study: Notification SystemChannels, dedup, retries and user preferences.+
• Video 58Case Study: A Payment Gateway like RazorpayLedger, webhook and reconciliation.+
• Video 59Case Study: Google Docs Collaborative EditorOT vs CRDT and real-time sync.+
• Video 60Quick Revision: Cheat-sheet and Rapid FireA recap of the whole course and interview one-liners.+