Systems Under Loadhttp://localhost:8080Technical notes on fail-fast admission control, overload protection, and Node.js reliability.Fail-fast vs bounded queue: the overload tradeoff nobody explains wellhttp://localhost:8080/journal/fail-fast-vs-bounded-queuehttp://localhost:8080/journal/fail-fast-vs-bounded-queueQueues reshape overload rather than eliminating it. See the tradeoff between immediate rejection and delayed pain.Wed, 6 May 2026 00:00:00 GMTReturn 503 before your Express route melts downhttp://localhost:8080/journal/express-route-overload-protectionhttp://localhost:8080/journal/express-route-overload-protectionRoute-level bulkheads let expensive Express handlers reject overload before downstream work begins.Wed, 6 May 2026 00:00:00 GMTStop letting LLM calls blow up your serverhttp://localhost:8080/journal/llm-admission-controlhttp://localhost:8080/journal/llm-admission-controlMost LLM tooling optimizes execution. async-bulkhead-llm decides whether a request should run at all.Wed, 6 May 2026 00:00:00 GMTWhen a bounded queue is the right callhttp://localhost:8080/journal/when-to-use-bounded-queuehttp://localhost:8080/journal/when-to-use-bounded-queueFail-fast gets the good press. But there are real cases where letting requests wait is the better engineering decision.Wed, 6 May 2026 00:00:00 GMTYour fetch calls don't know when to stophttp://localhost:8080/journal/fetch-calls-dont-know-when-to-stophttp://localhost:8080/journal/fetch-calls-dont-know-when-to-stopOutbound HTTP calls have no built-in concurrency limit. That's fine until a downstream dependency slows down and your service drowns in open connections.Wed, 6 May 2026 00:00:00 GMTp-limit doesn't tell you why it said nohttp://localhost:8080/journal/bulkhead-vs-concurrency-limiterhttp://localhost:8080/journal/bulkhead-vs-concurrency-limiterMost concurrency libraries silently queue your work. A bulkhead rejects it, tells you why, and lets your system stay responsive under load.Wed, 6 May 2026 00:00:00 GMT