With DynamoDB TTL you can clean up expired items for free – and that is exactly why people like to use it for something it cannot do: releasing a seat right on time after ten minutes. I keep running into this…
How to rate limit BullMQ workers in Node.js: the limiter option, handling 429 responses with worker.rateLimit, and how concurrency fits in. Most production BullMQ rate limiting setups use both: a limiter set slightly under the documented quota, plus manual…
Redis scripting lets an application perform several operations atomically. It also moves part of the application's data-access logic onto the server. The key names that the script can touch are supposed to be passed explicitly, especially in a cluster where…
Apollo Federation is one answer: each team owns a subgraph for its own types, and a router composes them into one supergraph. I built graphql-federation-playground to understand the patterns you hit in production, with Java subgraphs instead of the usual…
While Elastic subsequently returned Elasticsearch and Kibana to open source by adding AGPL as a licensing option, making up with AWS along the way, OpenSearch has continued forging its own path as an independent open source project — albeit one still…
You do not have to take my word for any of it. Installer sizes are straight from each project's GitHub Releases asset list (Windows x64, latest version at the time of writing): On a 32 GB machine where Docker and an IDE…
You connect your Redis GUI to the database your service writes to. You click a key. You get this: Or, depending on the client, a wall of �. This is not a bug in Redis and it is not a broken…
Every OpenAI embedding you store in Postgres is 6 KB. A hundred million documents is 600 GB of vectors before you build a single index, and an HNSW index wants to live in RAM. That is how a RAG prototype turns into…
Dense vector search is great until your agent asks for parseAuthHeader and gets back three chunks about "authentication token handling" — semantically close, functionally useless. Same story with file paths, error codes, and compliance clause numbers. These are lexical needles, and…
A Redis Cluster node can expose a client port and a cluster bus port. The first carries application commands; the second carries node-to-node cluster traffic. Enabling TLS only for application clients leaves a second network path that deserves its own…
Databases beyond tables: document stores, caches, search engines, and graph and vector databases.
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