AI explains system design and architecture concepts in simple terms. No fluff, no jargon walls — just clear explanations with diagrams.https://www.aiarchitecturenotes.in/https://www.aiarchitecturenotes.in/articles/redis/https://www.aiarchitecturenotes.in/articles/redis/How does a single thread handle 100K ops/sec? Dive into the event loop, memory layout, and why Instagram chose Redis for 300M mappings.Sun, 01 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/kafka/https://www.aiarchitecturenotes.in/articles/kafka/Why is sequential disk I/O faster than random memory access? Zero-copy transfers, partition replication, and how LinkedIn handles 7 trillion messages/day.Mon, 02 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/load-balancers/https://www.aiarchitecturenotes.in/articles/load-balancers/What happens in the 1ms an ALB adds to your request? L4 vs L7, consistent hashing math, and how Cloudflare routes 50M req/sec.Tue, 03 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/database-sharding/https://www.aiarchitecturenotes.in/articles/database-sharding/The $24K/month server that still isn't enough. How Instagram shards PostgreSQL, Discord handles trillions of messages, and when NOT to shard.Wed, 04 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/rate-limiting/https://www.aiarchitecturenotes.in/articles/rate-limiting/Why one Elon tweet can take down your API. Token buckets, Cloudflare's 99.997% accurate algorithm, and distributed rate limiting across 300 data centers.Thu, 05 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/justin-bieber-problem/https://www.aiarchitecturenotes.in/articles/justin-bieber-problem/The thundering herd problem explained through celebrity posts, cache stampedes, and the solutions that actually work.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/cap-theorem/https://www.aiarchitecturenotes.in/articles/cap-theorem/The CAP theorem says pick two: consistency, availability, partition tolerance. Google Spanner, DynamoDB, and the real tradeoffs.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/leader-follower/https://www.aiarchitecturenotes.in/articles/leader-follower/Leader-follower replication powers PostgreSQL, MySQL, MongoDB, and Redis. One node writes, the rest copy.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/active-replication/https://www.aiarchitecturenotes.in/articles/active-replication/Active-active replication lets every node accept writes. How CockroachDB and DynamoDB Global Tables handle it.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/wal/https://www.aiarchitecturenotes.in/articles/wal/Write-Ahead Logging is the reason your data survives power failures, kernel panics, and OOM kills.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/consensus/https://www.aiarchitecturenotes.in/articles/consensus/Paxos, Raft, and the consensus problem. How etcd, ZooKeeper, and CockroachDB get multiple nodes to agree.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/vector-clocks/https://www.aiarchitecturenotes.in/articles/vector-clocks/Wall clocks lie in distributed systems. Vector clocks track causal ordering without synchronized time.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/gossip-protocol/https://www.aiarchitecturenotes.in/articles/gossip-protocol/Gossip protocols spread information like rumors in a crowd. Cassandra, DynamoDB, and Consul use them.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/crdts/https://www.aiarchitecturenotes.in/articles/crdts/CRDTs let multiple users edit the same data without coordination. No locks, no conflicts, mathematically guaranteed.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/saga-pattern/https://www.aiarchitecturenotes.in/articles/saga-pattern/The Saga pattern breaks distributed transactions into compensatable steps. How Uber, Netflix, and Airbnb do it.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/consistent-hashing/https://www.aiarchitecturenotes.in/articles/consistent-hashing/Consistent hashing lets distributed systems add and remove nodes without reshuffling all the data.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/github-outage/https://www.aiarchitecturenotes.in/articles/github-outage/A routine network maintenance caused a 43-second partition, MySQL failover triggered, and GitHub spent 24 hours recovering.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/discord-messages/https://www.aiarchitecturenotes.in/articles/discord-messages/Discord migrated from MongoDB to Cassandra to ScyllaDB. Each migration solved one problem and created another.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/cloudflare-outage/https://www.aiarchitecturenotes.in/articles/cloudflare-outage/A regular expression in Cloudflare's WAF caused every CPU core across their global network to spike to 100%.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/tail-latency/https://www.aiarchitecturenotes.in/articles/tail-latency/Your average latency is 5ms. Your p99 is 500ms. At Google's scale, every user hits tail latency.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/mqtt/https://www.aiarchitecturenotes.in/articles/mqtt/How a protocol designed for oil pipelines in 1999 now powers the entire IoT world.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/tcp-handshake/https://www.aiarchitecturenotes.in/articles/tcp-handshake/Every TCP connection starts with a three-way handshake. SYN, SYN-ACK, ACK.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/dns-resolution/https://www.aiarchitecturenotes.in/articles/dns-resolution/DNS resolves the name to an IP through root servers, TLD servers, and authoritative nameservers.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/websockets/https://www.aiarchitecturenotes.in/articles/websockets/WebSockets upgrade an HTTP connection into a persistent, full-duplex channel.Mon, 09 Mar 2026 00:00:00 GMThttps://www.aiarchitecturenotes.in/articles/connection-pooling/https://www.aiarchitecturenotes.in/articles/connection-pooling/Connection pooling reuses connections to avoid TCP handshake, TLS, and auth costs.Mon, 09 Mar 2026 00:00:00 GMT