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Open Source for Open Knowledge

Category: Site Reliability Engineering

World map representing all the oceanic cables, highlighting the ones in relation to Marseille

Building DReaMeRS: How and why we opened a datacenter in France

Content delivery networks (CDNs) are one of the modern building blocks of the Internet. This blog post highlights a recent addition to Wikimedia’s CDN setup.
Continue reading “Building DReaMeRS: How and why we opened a datacenter in France”…
Posted on: July 15, 2022 Last updated on: July 15, 2022 Comments: 2 Arzhel Younsi
https://commons.wikimedia.org/wiki/File:Wikimedia_Foundation_Servers_2015-54.jpg

June 2021 Datacenter Switchover

In June 2021, most user traffic was switched from our primary Virginia datacenter to our secondary one in Texas. This post covers how the swtichover went and the issues that came up.
Continue reading “June 2021 Datacenter Switchover”…
Posted on: July 23, 2021 Last updated on: July 26, 2021 Comments: 1 Kunal Mehta
https://commons.wikimedia.org/wiki/File:TurkishHandmadePadlocks.jpg

The rollout of single-sign-on (SSO) at the Wikimedia Foundation

This is the second part of a three part series on the rollout of single-sign-on (SSO) at the Wikimedia Foundation.
Continue reading “The rollout of single-sign-on (SSO) at the Wikimedia Foundation”…
Posted on: July 22, 2021 Last updated on: July 26, 2021 Comments: 0 Moritz Mühlenhoff and John Bond
https://commons.wikimedia.org/wiki/File:Locks_and_keys_-_a_quintuple_misfit.jpg

Wikimedia SSO: Evaluation

In the first of three posts about the implementation of Single Sign On (SSO). This post looks at the original landscape of Wikimedia’s web-based services, summarizes requirements for a new SSO provider, looks at existing FLOSS solutions, and explains why Apereo CAS was chosen.
Continue reading “Wikimedia SSO: Evaluation”…
Posted on: March 10, 2021 Last updated on: March 10, 2021 Comments: 1 Moritz Mühlenhoff and John Bond
https://commons.wikimedia.org/wiki/File:Wikimedia_Foundation_Servers-8055_05.jpg

Wikimedia’s CDN: datacenter switchover

The 3rd and last article of a series that describes some of the changes to Wikimedia’s Content Delivery Network, including the replacement of Varnish with Apache Traffic Server (ATS) as the on-disk HTTP cache component of the CDN.
Continue reading “Wikimedia’s CDN: datacenter switchover”…
Posted on: December 17, 2020 Last updated on: December 18, 2020 Comments: 3 Emanuele Rocca
https://upload.wikimedia.org/wikipedia/commons/thumb/4/40/On_the_road%2C_Death_Valley_%2823702938504%29.jpg/1024px-On_the_road%2C_Death_Valley_%2823702938504%29.jpg

Wikimedia’s CDN: the road to ATS

The 2nd of a 3 part series that describes some of the changes to Wikimedia’s Content Delivery Network, including the replacement of Varnish with Apache Traffic Server (ATS) as the on-disk HTTP cache component of the CDN.
Continue reading “Wikimedia’s CDN: the road to ATS”…
Posted on: November 25, 2020 Last updated on: December 18, 2020 Comments: 1 Emanuele Rocca

Impact of using HTTP connection pooling for PHP applications at scale

This post explores the challenges of running PHP applications at a large scale and discusses the effect of using Envoy on MediaWiki applications.
Continue reading “Impact of using HTTP connection pooling for PHP applications at scale”…
Posted on: October 26, 2020 Last updated on: December 1, 2020 Comments: 1 Giuseppe Lavagetto
https://commons.wikimedia.org/wiki/File:North_America_from_low_orbiting_satellite_Suomi_NPP.jpg

Wikimedia’s CDN up to 2018: Varnish and IPSec

The 1st of a 3 part series that will describe some of the changes, which included replacing Varnish with Apache Traffic Server (ATS) as the on-disk HTTP cache component of the CDN.
Continue reading “Wikimedia’s CDN up to 2018: Varnish and IPSec”…
Posted on: October 14, 2020 Last updated on: November 4, 2022 Comments: 1 Emanuele Rocca

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