Design (LLD) content delivery network like cloudflare - Machine CodingSubhahu Jain·Dec 31, 2022·7 min readTable of contentsCodeIssues in above design🔥 Problem 1: Central ContentDeliveryNetwork Is a Bottleneck❌ What we Did❌ Why This Is Fundamentally WrongSolution🔥 Problem 2: Load Balancer Ignores Geography (Core CDN Failure)❌ What we Did❌ Why This Breaks CDN FundamentalsSolution🔥 Problem 3: Cache Invalidation Is Synchronous (Scalability Killer)❌ What we Did❌ Why This Is CatastrophicSolution🔥 Problem 4: Replication Logic Is Naive and Dangerous❌ What we Did❌ Why This Is a Huge Red FlagSolution🔥 Problem 5: Cache TTL Is Incorrect and Unsafe❌ What we Did❌ Why This Is WrongSolution🔥 Problem 6: DNS Is Modeled Incorrectly❌ What we Did❌ Why This Is Conceptually BrokenSolution🔥 Problem 7: Security Model Is Toy-Level❌ What we Did❌ Why This Would Never Pass ReviewSolution🔥 Problem 8: Monitoring & Auto-Scaling Are Fake❌ What we Did❌ Missing RealitySolutionJavaScriptPythonGeneral ProgrammingProgramming BlogsAWS
