https://www.rik-kisnah.ai/tags/sre/Recent content in SRE on Rik Kisnah - BlogHugoenTue, 10 Feb 2026 09:00:00 -0800https://www.rik-kisnah.ai/teach/systems/design-an-on-call-paging-system/Tue, 10 Feb 2026 09:00:00 -0800https://www.rik-kisnah.ai/teach/systems/design-an-on-call-paging-system/When the alert fires, wake exactly the right person, make sure someone acknowledges it, and escalate if nobody does. The system that pages must be the last thing standing when everything else is down, so it must not depend on anything else.https://www.rik-kisnah.ai/teach/systems/design-a-safe-deployment-system/Tue, 22 Oct 2019 09:00:00 -0700https://www.rik-kisnah.ai/teach/systems/design-a-safe-deployment-system/Ship new code to ten thousand machines without taking the site down. One box first, then a few, then a region, with a health check at every step and a rollback that needs no human. The design is the gates, not the copying.