/tags/lifecycle/Recent content in Lifecycle on Momo Engineering Journal/images/og-image.png/images/og-image.pngHugoen-usWed, 28 Oct 2026 17:47:15 -0600/posts/058-s3-lifecycle-on-cas/Wed, 21 Oct 2026 03:35:13 +0000/posts/058-s3-lifecycle-on-cas/Lifecycle rules are the first feature that makes momo delete data on a schedule rather than on request — which turns age, storage class, and delete markers into correctness problems. This post walks through the expiration and transition engine, why a background worker is the only safe place to run it, and how expiration composes with versioning’s delete markers.