https://www.rik-kisnah.ai/tags/availability/Recent content in Availability on Rik Kisnah - BlogHugoenTue, 10 Sep 2024 09:00:00 -0700https://www.rik-kisnah.ai/teach/systems/design-a-multi-region-service/Tue, 10 Sep 2024 09:00:00 -0700https://www.rik-kisnah.ai/teach/systems/design-a-multi-region-service/Run the same service in three regions, all taking writes, and survive one region vanishing. The compute part is easy. The data part forces a choice you cannot dodge: who wins when two regions write the same row at the same moment.https://www.rik-kisnah.ai/teach/systems/scale-from-zero-to-millions-of-users/Tue, 15 Sep 2020 09:00:00 -0700https://www.rik-kisnah.ai/teach/systems/scale-from-zero-to-millions-of-users/Start with one machine. Add users until it hurts, fix the one thing that hurts, repeat. Ten rungs from a single box to a sharded, cached, multi-region system, and the reason each rung exists. Learn the ladder once and half the design round becomes recognising which rung you are standing on.https://www.rik-kisnah.ai/teach/systems/design-a-load-balancer/Tue, 04 Oct 2016 09:00:00 -0700https://www.rik-kisnah.ai/teach/systems/design-a-load-balancer/A restaurant host who seats guests, checks which waiters showed up, and never becomes the reason the restaurant closes. Layer 4 versus layer 7, health checks, and the part everyone forgets: who balances the balancer?