MaGe Linux Operations

Oct 8, 2021 · Operations

What Triggered Facebook’s 7‑Hour Global Outage? Inside the DNS and Backbone Failure

On October 4, a faulty maintenance command disabled Facebook’s DNS servers and severed its global backbone network, causing a seven‑hour outage that affected billions of users, highlighted architectural flaws, and underscored the need for redundant DNS and better operational safeguards.