Simon Willison’s Weblog


Monday, 6th December 2021

Google Public DNS Flush Cache (via) Google Public DNS ( have a flush cache page too. # 11:17 pm (via) Cloudflare’s DNS service has a tool that anyone can use to flush a specific DNS entry from their cache—could be useful for assisting rollouts of new DNS configurations. # 11:15 pm

Centrifuge: a reliable system for delivering billions of events per day (via) From 2018, a write-up from Segment explaining how they solved the problem of delivering webhooks from thousands of different producers to hundreds of potentially unreliable endpoints. They started with Kafka and ended up on a custom system written in Go against RDS MySQL that was specifically tuned to their write-heavy requirements. # 1:41 am

2021 » December