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The Recover Accounts Elsewhere feature lets you associate your GitHub account with your Facebook account. This will help us recover your account for certain two-factor authentication lockout scenarios. For example,…
Last year we shared some details on GitHub's CSP journey. A journey was a good way to describe it, as our usage of Content Security Policy (CSP) significantly changed from…
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…
The GitHub Bug Bounty Program is turning three years old. To celebrate, we're offering bigger bounties for the most severe bugs found in January and February. The bigger the bug,…
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…
We serve a lot of diffs here at GitHub. Because it is computationally expensive to generate and display a diff, we've traditionally had to apply some very conservative limits on…
As part of the design of GLB, we set out to solve a few of the common issues found when using HAProxy at scale.
On Thursday, October 20th, a bug in GitHub’s system exposed a small amount of user data via Git pulls and clones. In total, 156 private repositories of GitHub.com users were…
Today we are announcing the open source release of octocatalog-diff: GitHub's Puppet development and testing tool. GitHub uses Puppet to configure the infrastructure that powers GitHub.com, comprised of hundreds of…
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.
GitHub announced a public API one month after the site launched. We've evolved this platform through three versions, adhering to RFC standards and embracing new design patterns to provide a clear and consistent interface.
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…
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…
Today we are announcing the open source release of gh-ost: GitHub's triggerless online schema migration tool for MySQL. gh-ost has been developed at GitHub in recent months to answer a…
GitHub hosts a wide range of user content, and like all large websites this often causes us to become a target of denial of service attacks. Around a year ago,…