In this blog post we will discuss how we made our infrastructure DNS zone more reliable by using multiple primary nameservers to leverage our own DNS product running on our edge as well as a third-party DNS provider.Authoritative NameserversYou can think of an authoritative nameserver as the source of truth for the records of a…
Read More
While our colleagues in the US are celebrating Thanksgiving this week and taking a long weekend off, there is a lot going on at Cloudflare. The EMEA team is having a full day on CloudflareTV with a series of live shows celebrating #CloudflareCareersDay.So if you want to relax in an active and learning way this…
Read More
At Cloudflare we pride ourselves in our global network that spans more than 200 cities in over 100 countries. To handle all the traffic passing through our network, there are multiple technologies at play. So let’s have a look at one of the cornerstones that makes all of this work… ASICs. No, not the running…
Read More
An analysis of the Cloudflare API availability incident on 2020-11-02When we review design documents at Cloudflare, we are always on the lookout for Single Points of Failure (SPOFs). Eliminating these is a necessary step in architecting a system you can be confident in. Ironically, when you’re designing a system with built-in redundancy, you spend most…
Read More
The idea of serverless is to allow developers to focus on writing code rather than operations — the hardest of which is scaling applications. A predictably great deal of traffic that flows through Cloudflare’s network every year is Black Friday. As John wrote at the end of last year, Black Friday is the Internet’s biggest…
Read More
One of the great arts of software engineering is making updates and improvements to working systems without taking them offline. For some systems this can be rather easy, spin up a new web server or load balancer, redirect traffic and you’re done. For other systems, such as the core distributed data store which keeps millions…
Read More
Maintaining a server fleet the size of Cloudflare’s is an operational challenge, to say the least. Anything we can do to lower complexity and improve efficiency has effects for our SRE (Site Reliability Engineer) and Data Center teams that can be felt throughout a server’s 4+ year lifespan.At the Cloudflare Core, we process logs to…
Read More
Making things fast is one of the things we do at Cloudflare. More responsive websites, apps, APIs, and networks directly translate into improved conversion and user experience. Today, Google announced that Google Search will directly take web performance and page experience data into account when ranking results on their search engine results pages (SERPs), beginning…
Read More