https://pravin.dev/Pravin on SoftwareA blog which shares my knowledge while working as Software Engineer. 2026-05-01T16:46:39+05:30 Pravin Tripathi https://pravin.dev/ Jekyll © 2026 Pravin Tripathi /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png OpenSearch for Observability — Part 4: Latency & Failure Modes2026-04-10T10:00:00+05:30 2026-04-10T10:00:00+05:30 https://pravin.dev/posts/opensearch-logging-4/ pravin_tripathi In the previous three articles, we covered the architecture of OpenSearch and Fluent Bit, how to set up a high-throughput logging pipeline, and how to optimize for ingestion performance. In this final article, we dive into the most common latency and failure modes that occur in production — from backpressure mechanics to segment merging to the hot shard problem — and how to diagnose and fix the... OpenSearch for Observability — Part 3: OpenSearch as a Metrics Backend2026-04-10T10:00:00+05:30 2026-04-12T20:35:19+05:30 https://pravin.dev/posts/opensearch-logging-3/ pravin_tripathi In Part 2 we covered Amazon OpenSearch Ingestion, time-based index strategy, ISM lifecycle policies, and network optimisation for high log volume. This post completes the series. We will use OpenSearch not just for logs but as a metrics backend — replacing or complementing Prometheus — and then wire everything together with dashboards and alerting. Table of Contents OpenSearch as a Metr... OpenSearch for Observability — Part 2: Ingestion Pipeline, Index Strategy, and Network Optimisation2026-04-10T09:30:00+05:30 2026-04-10T09:30:00+05:30 https://pravin.dev/posts/opensearch-logging-2/ pravin_tripathi In Part 1 we traced the journey of a log record from logger.info() inside your application, through Python’s logging internals, through Docker’s log driver, and into a Fluent Bit sidecar’s output queue. We stopped at the point where Fluent Bit is about to send a bulk HTTP request. This post picks up there. We will explore what happens inside Amazon OpenSearch Ingestion, how to design your inde... OpenSearch for Observability — Part 1: From logger.info() to the Wire2026-04-10T09:00:00+05:30 2026-04-10T09:00:00+05:30 https://pravin.dev/posts/opensearch-logging-1/ pravin_tripathi So far in this series we have explored how OpenSearch indexes application data and how reindexing works under the hood. Both posts dealt with data you intentionally write — product catalogs, user records, domain documents. This post shifts focus entirely to data your application emits as a side effect of doing its work: logs. Logging sounds simple. You call logger.info("Payment processed") and... The Feature Flag That Taught Me Three Hard Lessons2026-03-13T00:00:00+05:30 2026-03-13T00:00:00+05:30 https://pravin.dev/posts/the-feature-flag-that-taught-me-three-hard-lessons/ pravin_tripathi Table of Contents The Setup Case 1: The Zombie Flag Case 2: The Name Collision Nightmare Case 3: The Flag Matrix — When Testing Becomes a Nightmare Looking Back Feature flags feel like magic when you first discover them. You can toggle behavior in production without a new deployment, roll back instantly when something breaks, and run experiments safely. I was no different — I loved...