Feeds at scale: when to push, when to pull
Fan-out on write makes reads instant until one account has fifty million followers. Here is how to reason about the hybrid most real feeds use.
WRITING / NOTES FROM THE FORGE
Scalability
4 articles tagged Scalability.
Rate Limiting Algorithms Explained: Token Bucket, Sliding Window, and More
Rate limiting algorithms explained with code: token bucket, leaky bucket, fixed window, and sliding window, plus how to pick one and run it across servers.
Database Sharding Explained: When and How to Shard
Database sharding explained: when you actually need it, how to pick a shard key, range vs hash vs directory sharding, and how to handle rebalancing.
Load Balancing Algorithms Explained: Round Robin to Consistent Hashing
Load balancing algorithms explained: round robin, weighted, least connections, IP hash, power of two choices, and consistent hashing, with when to use each.