AWS OpenSearch Service: An Architecture Deep-Dive
AWS OpenSearch Service runs behind more production workloads than most engineers realize: log analytics, full-text search, security event monitoring, vector similarity search. Lots of teams deploy it. Few really understand what's happening underneath. I've designed and operated OpenSearch clusters for years now, everything from small dev setups to multi-petabyte production deployments ingesting billions of documents a day. My first cluster went red within 48 hours. I've learned a lot since then.