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How GitHub approaches infrastructure – Page 3 of 3 – The GitHub Blog

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Infrastructure

From maintaining our robust CI/CD tooling to scaling our databases and ensuring our tools are kept up-to-date, maintaining the infrastructure of the world’s leading AI-powered developer platform is a big job. This is how we do it.

An illustration of two octocats repairing a robot.

Engineering

Kubernetes at GitHub

Over the last year, GitHub has gradually evolved the infrastructure that runs the Ruby on Rails application responsible for github.com and api.github.com. We reached a big milestone recently: all web…

Engineering

MySQL infrastructure testing automation at GitHub

Our MySQL infrastructure is a critical component to GitHub. MySQL serves GitHub.com, GitHub’s API, authentication and more. Every git request touches MySQL in some way. We are tasked with keeping…

Engineering

DNS Infrastructure at GitHub

At GitHub we recently revamped how we do DNS from the ground up. This included both how we interact with external DNS providers and how we serve records internally to…

Engineering

Enabling DNS split authority with OctoDNS

Building robust systems involves designing for failure. As Site Reliability Engineers at GitHub, we’re always on the lookout for places where redundancy can help to mitigate problems, and today we’ll…

Engineering

Moving persistent data out of Redis

Historically, we have used Redis in two ways at GitHub: We used it as an LRU cache to conveniently store the results of expensive computations over data originally persisted in…

Engineering

Orchestrator at GitHub

GitHub uses MySQL to store its metadata: Issues, Pull Requests, comments, organizations, notifications and so forth. While git repository data does not need MySQL to exist and persist, GitHub’s service…

Engineering

Introducing the GitHub Load Balancer

Over the last year we’ve developed our new load balancer, called GLB (GitHub Load Balancer). Today, and over the next few weeks, we will be sharing the design and releasing its components as open source software.

Engineering

Building resilience in Spokes

Spokes is the replication system for the file servers where we store over 38 million Git repositories and over 36 million gists.It keeps at least three copies of every repository…

Engineering

Context aware MySQL pools via HAProxy

At GitHub we use MySQL as our main datastore. While repository data lies in git, metadata is stored in MySQL. This includes Issues, Pull Requests, Comments etc. We also auth…

Engineering

GitHub’s Metal Cloud

At GitHub we place an emphasis on stability, availability, and performance. A large component of ensuring we excel in these areas is deploying services on bare-metal hardware. This allows us…

Engineering

Yummy cookies across domains

Last Friday we announced and performed a migration of all GitHub Pages to their own github.io domain. This was a long-planned migration, with the specific goal of mitigating phishing attacks…

Engineering

TCMalloc and MySQL

Over the last month or so, we noticed steady week-over-week rises in overall MySQL query time. A poorly-performing database makes for a slow site and a slow site makes for…

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