Requesting the difference between two previously cached files — using just a CDN configuration and a serverless cloud compute function — is a great example of exploiting edge and serverless compute services to make your website more efficient and performant, and lower your bandwidth costs. Read on to learn more.

Fastly’s engineering teams are smart and capable — they architect thoughtfully, write elegant code, and work carefully with incredible complexity and scale. So why would they (or anyone) need quality assurance (QA)? In this post, Senior QA Automation Engineer Alice Nodelman examines how the QA mindset works, touching on our approach to QA at Fastly and sharing how you could apply this mindset to your organization.

We’re pleased to announce the next installment of our Security Speaker Series, which brings together researchers and engineers to share research, tools, and ideas. Join us for drinks, snacks, and a few hours of excellent security discussion on Thursday, Oct. 26 at 6pm PT at Bespoke Central Lounge in downtown San Francisco. Speakers include Alex Bazhaniuk, of Eclypsium, Inc., and Stephen Checkoway, of the University of Illinois.

In keeping with our security team’s vision for defending the modern web, we launched our Web Application Firewall (WAF) to help our customers secure their sites and applications while providing reliable online experiences for their users. In this post, two of the engineers who built our WAF will take you on a deep dive into the tech behind it, exploring how we built a performant, highly configurable, and comprehensive solution to secure customers’ infrastructure.

Deliberate practice is the act of performing a set of tasks that are just slightly more difficult than what you’re used to, so you can get better at a specific activity and move from a novice to an experienced practitioner. In this post, Security Engineer Sandra Escandor-O’Keefe walks us through the art of deliberate practice, offering tips for novices and mentors alike.

We’ve worked to ensure the Fastly Image Optimizer is simple, easy to use, and most importantly fully integrated into the platform. In an effort to give you even more control, we've developed image transformation classes to help streamline, secure, and support your image delivery workflow.

We’ve recently had the opportunity to turn customer feedback into new features for the Fastly control panel. Hear from our lead product designers on the latest changes, including an all services homepage, easier way to customize your VCL, and more.

During the investigation of a customer report, Fastly became aware of and addressed a security vulnerability (CVE-2017-13761) in the Fastly CDN module intended to be integrated into Magento2. This is open source code which Fastly releases to enable easy integration with our partner’s products. All versions prior to 1.2.26 are affected and customers are encouraged to upgrade. Fastly has reached out directly to customers currently using affected versions of the module.

Altitude SF 2017 brought together technical leaders from Reddit, the ACLU, TED, Slack, and more to explore the future of edge delivery, emerging web trends, and the challenges of cloud infrastructure and security. In this post, we’ll share Daniel Ellis’ talk on how Reddit built and scaled r/place, their real-time April Fools’ project.

We need technology to provide capabilities to tackle the challenge of the cybersecurity gaps, recently highlighted by the WannaCry attacks. In this post, Director of Security Research Jose Nazario will explore these challenges as well as share research objectives that industry and academia must address soon before we can begin solving the security issues with IoT.

You can use the `Vary` response header in creative ways, including A/B testing and internationalization. At the same time, many people still use `Vary` badly or misunderstand what it does; in this post, we’ll provide an expanded guide, including some of the more exotic ways you can get value out of `Vary` in intermediate caches like Fastly.

A tale of failure and recovery from Kenton Jacobsen, Director of Engineering at Vogue.com and Glamour.com.

In an ongoing effort to help you provide the best streaming experiences for your end users, we’re excited to announce two new features to our OTFP service. Multi-DRM support and content preconditioning enable over the top (OTT) video service providers to protect and efficiently monetize premium video content.

We’re pleased to announce that we’ve added a collection of new POPs to the Fastly global network. Since our last update, we’ve deployed additional US POPs in Chicago, Newark, Ashburn, and Los Angeles, plus a brand-new location in Rio de Janeiro, Brazil. Fastly’s global network now exceeds 15 Tbps of connected internet capacity, and we will continue to scale alongside our rapidly growing customer base.

Surrogate keys give Fastly customers a unique way to efficiently purge content from cache — batch API for surrogate key purge allows you to purge content even more efficiently by purging multiple surrogate keys at once. Read on to learn how to best take advantage.

Altitude SF 2017 featured hands-on trainings and talks from industry leaders like Reddit, the ACLU, Slack, TED, and more. We explored the future of edge delivery, heard about emerging trends in cloud infrastructure and DevOps, and tackled complex problems in cloud security. Read on for our recap of the event (plus slides, videos, and photos).

In an effort to move forward from early architecture that we were quickly outgrowing, we recently migrated our Historical Stats database from self-managed MySQL to Google Cloud Bigtable. Read on to learn how we did it (without any downtime).

Altitude NYC featured war stories from Fastly customers like Vogue, Spotify, and HashiCorp. Read on for our recap of Seth Vargo’s talk, where he discussed how HashiCorp was able to quickly recover from an outage (which included an alarming “purge all” moment).