Cloudflare built a global cache purge system that runs under 150 ms. This is how they did it.Using RockDB to maintain local CDN cache, and a peer-to-peer data center distributed system and clever engineering, they went from 1.5 second purge, down to 150 ms.However, this isn’t full picture, because that 150 ms is just actually the P50. In this video I explore Clouldflare CDN work, how the old core-based centralized quicksilver, lazy purge work compared to the new coreless, decentralized active purge. In it I explore the pros and cons of both systems and give you my thoughts of this system.Cloudflare blog https://blog.cloudflare.com/instant-purge/Mentioned VideosCloudflare blog https://blog.cloudflare.com/instant-purge/Percentile Tail Latency Explained (95%, 99%) Monitor Backend performance with this metrichttps://www.youtube.com/watch?v=3JdQOExKtUYHow Discord Stores Trillions of Messages | Deep Divehttps://www.youtube.com/watch?v=xynXjChKkJcFundamentals of Operating Systems Course https://os.husseinnasser.comBackend Troubleshooting Coursehttps://performance.husseinnasser.com