Consensus on Rik Kisnah - Bloghttps://www.rik-kisnah.ai/tags/consensus/Recent content in Consensus on Rik Kisnah - BlogHugoenTue, 11 May 2021 09:00:00 -0700Design a Distributed Lockhttps://www.rik-kisnah.ai/teach/systems/design-a-distributed-lock/Tue, 11 May 2021 09:00:00 -0700https://www.rik-kisnah.ai/teach/systems/design-a-distributed-lock/Only one process at a time may touch the thing. Easy on one machine. Across a network, the lock holder can die, pause, or believe it still holds the lock when it does not. Leases, fencing tokens, and the honest answer: a lock cannot make an unsafe operation safe.