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Performance

April 22

Reusing connections between your Varnish instance and your backends (origins) is a good idea for multiple reasons. If your Varnish is on the same network as your backends and you're doing…

April 3

We’re constantly monitoring our CDN’s performance from as many locations and network providers around the world as possible. Monitoring performance matters — not just for your servers and…

March 30

At the core of Fastly is Varnish, an open source web accelerator that’s designed for high-performance content delivery. Varnish is the key to being able to accelerate dynamic content, APIs…

March 18

The cache hit ratio (or hit ratio for short) is the ratio of hits to cacheable requests (hits and misses combined). There's also cache coverage, the ratio of cacheable requests to all…

January 27

If you want to increase the efficiency of your Varnish (or Fastly) cache, you need to figure out what traffic is not cached. By definition, any traffic that reaches your origin is not cached…

January 9

In the second part of our series on accelerating Rails, I'll cover configuration of a few Fastly features, Varnish and Varnish Configuration Language (VCL), and strategies for caching…

December 15

In the continued quest to increase cache hit ratios, the chant is: "Normalize, normalize, normalize." Less variation in your requests means you have a higher chance of getting hits. This…

November 19

Caching is one strategy that helps ease scaling pains that I often see Rails developers overlooking. Starting out with caching can be confusing, because terms and documentation can be…

November 17

In this post, I’m going to discuss how you can leverage ESI and VCL (Varnish Configuration Language, the domain-specific language that powers Fastly’s edge scripting capabilities) to use…

October 27

Today, we’re excited to announce two related features that lower bandwidth costs and reduce origin load for Fastly customers, resulting in faster downloads for their users: Streaming Miss…