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Latest Articles
On October 20 2025, AWS experienced a significant disruption in its US-East-1 region, causing elevated error rates and...
In software delivery pipelines, teams depend on registries to store and distribute artifacts such as Docker images,...
One of the slowest things you can do in an application is making system calls. They're slow because you do have to...
In this blog post, we will take a look at how Git clients communicate with Git repositories and how we can employ...
Varnish is a programmable HTTP engine and cache that operates at the application layer. Its standard role is to...
At a Glance: Challenge: Internal systems and pipelines are often slowed by fragmented, inconsistent delivery of...
The Silent Killer of Developer Productivity In the relentless pace of modern software development, speed is paramount....
The point of this blog is to demonstrate how to position Varnish Enterprise in front of a Wasabi S3 bucket. If you...
Wasabi Hot Cloud Storage is known for its impressive performance and simplified pricing—especially its policy of zero...
At Varnish Software, we maintain a steady cadence of updates to Varnish Enterprise: small, regular improvements that...
Varnish Controller is the tool we built to help manage Varnish servers at scale. If you’ve ever had to coordinate...
Docker, the widely used containerization platform, is central to modern CI/CD pipelines, with Docker images being...
Just last month, I released my first-ever webinar on Package Caching for Debian, NPM, Go, and Docker. This time, I’m...
A little bit about compute in Varnish Cache and some Deno JS benchmarks Hey all. I recently wrote about TinyKVM, a...
Building a Private CDN, sometimes referred to as DIY CDN, is a theme that has been discussed in the world of content...
An introduction to a KVM-based single-process sandbox Hey All. In between working on my PhD, libriscv and an untitled...
Last year, I wrote about the need for observability, touched on how precise the varnish reports can be, how it’s...
One of Varnish's key strengths is its ability to quickly look up an object by hash in memory or on disk and return it...
Varnish is designed to optimize performance by enabling opportunities for efficiency improvements. In previous...
You’ve optimized your code. You’ve automated your tests. You’re using the latest CI/CD tools. So why are your builds...
HTTP has been around a long time. Like, it's now at the age where it's probably considering buying a red convertible....
About the Project This article explores how Intel®'s Converged Edge Media Platform (Reference Architecture), combined...
2024 is done and dusted and while 2025 will be a busy and exciting year, I’d like to take the time to look back at...
Varnishlog is a powerful tool that allows you to perform an in-depth analysis of the requests that flow through the...
Recently, I’ve been talking about object storage and one topic we absolutely need to discuss is sharding because it’s a...
With another CDN announcing they are leaving the industry this quarter, the search for an affordable, performant, and...
A few weeks ago, we talked about making your object storage faster and reducing costs, staying fairly high-level. We...
Our latest release, Varnish Enterprise 6.0.13r8, introduces new features and optimizations that make a real difference...
As businesses shift to cloud-based infrastructure, managing massive amounts of unstructured data has made object...
Magento is a well-known open source e-commerce platform that has its roots in open source, just like us. And just like...
There are more options than the Cloud Content delivery is expensive, and with every business in the industry looking to...
When you send an HTTP request to a server, it’s unlikely that you are talking to it directly. Rather, you are sending...
Hello there! This article is the third part of a series, you may want to start at the beginning (The Basics), or at...
In our previous post, Varnish and Observability (Part 1: The Basics), we explored the Varnish ecosystem of core tools...
Speed is one of the most crucial aspects of any online experience. And today, speed isn’t just a nice-to-have—it’s a...
Do you wish you knew what device or browser your clients are using? Do you need to take on-the-fly decisions based on...
Life as a reverse-proxy can be tough, you know? On one side, you have users in a hurry coming to you to get their...
Microservices are great: they isolate concerns, provide modular and reusable components and forces us, developers, to...
Amazon S3 was one of the original web services. Launched in 2006, the service delivered on its promise of being a...
Is Varnish fast? Of course it is! I know that, you know that, but I want my friends, and my friends’ friends to also...
Let’s open with an extremely controversial statement: you should run up-to-date software*. I think everybody here...
Varnish Cache is deployed behind millions of websites worldwide. It’s a useful, powerful tool for site reliability...
This week, I must say, I’m a bit grumpy. I’ve once again run into a bad architecture pattern that has bitten our users...
Have a seat, we need to have a serious discussion. Don’t worry, you’re not in trouble, but we’ve got to talk. Well,...
In this blog, we delve into how a leading online bank significantly enhanced its web performance and security using...
Today, I want to celebrate the new Ubuntu release: Noble Numbat. It came out a few days ago and as usual it comes with...
I usually have a way with long-winded introductions, but not today. Today, I’m just too excited to share the news to...
A few days ago we looked at how Varnish is great at video streaming, and we touched on the high-level concepts that...
Over the last decade, video streaming has been firmly migrating to an Over-The-Top (OTT) model, using video streaming...
TL;DR: By redesigning aging infrastructure with Varnish Enterprise for better traffic management and speed, a global...
A new Docker image was expected since Varnish Cache 7.5 just got released a few days ago. But this time, the new image...
March 15th just passed, which means we can expect a new release of Varnish Cache. As a quick reminder: every year on...
DevOps bottlenecks are frustrating. Long artifact retrieval times slow down CI/CD pipelines, increase cloud costs and...
In this blog post, we’ll explore the evolving landscape of content delivery. We'll delve into the shift to edge...
Digital agility defines success. The Hindu, a highly popular English-language daily newspaper in India, provides a...
Varnish Controller 6.0 is here! This represents a milestone for Varnish Software and the evolution of Controller, our...
APA-IT, Austria's premier media and broadcasting service provider, excels in offering IT services to the Austrian news...
We’re happy to announce the availability of the official Varnish Enterprise Helm Chart. Helm is a package manager and...
Welcome to Varnish Software's roundup of this year’s most popular blog posts! Whether you're new to Varnish or a...
In the dynamic world of fast fashion, delivering the latest trends to customers worldwide requires a seamless online...
WordPressis one of the most popular content management systems in the world. It originally started as blogging...
The Varnish Developer Portal is a treasure trove of resources designed to empower developers with the knowledge needed...
Mauve Mailorder Software(Mauve) stands out as a trailblazer in digitizing pharmacies and advancing the online pharmacy...
Many of us interact with web portals on a near-daily basis. These platforms serve as centralized hubs for accessing,...
Almost all organizations rely on some form of content delivery. From websites to media to software. The transfer of...
This article is intended as a reference guide for users looking for a side-by-side comparison of the features found in...
Digital processes and data transfer are the backbone of day-to-day operations for enterprises everywhere. With digital...
In the realm of content delivery, the need for speed and efficiency is undeniable. Users expect swift webpage loads,...
In the dynamic world of technology, questions arise and solutions are sought. Stack Overflow stands as a beacon,...
Varnish sits in front of the web or application server and caches its output. This means that the logs of the web...
Is the era of "cheap, all-you-can-watch content” (for consumers) ending? This is the contention of a recent Guardian...
web performance
content delivery
reduce streaming costs
content delivery software
reduce egress fees
The move from legacy distribution methods towards an all-IP streaming business model is top of mind for broadcasters,...
“From an infrastructure provisioning point of view, if you can deliver the same or better demand with less...
When talking about caching, nearly all the attention goes to ensuring that content is properly stored in the cache....
MSE
Varnish Massive Storage Engine
VoD
VoD streaming
edge computing
Varnish Controller
Traffic Router
In our recent webinar with STL, From CDN to Edge Content Delivery: Quantifying the Big Opportunity, we received a lot...
For e-commerce and online retail, revenue and web performance are inextricably linked. Delays, latency and downtime...
A microservice is an autonomous subset of a software system, often responsible for managing some of the data within...
Varnish Enterprise version 6.0.11r2 contains a new Varnish Module (VMOD). S3 VMOD provides functionality for using...
In a collaboration with STL Partners, Varnish has released a webinar “From CDN to Edge Content Delivery: Quantifying...
What is TLS? TLS, or Transport layer security, is a more modern version of the original SSL (Secure Socket Layer). It’s...
With new breakthroughs, innovations and exciting digital experiences emerging, last year was pivotal for the content...
Today is March 15th and that means it’s release day! Every year on March 15th and September 15th, a new version of...
Recently, Varnish Technical Evangelist Thijs Feryn led a webinar covering Varnish Configuration Language (VCL), the...
Varnish Controller is our orchestration tool, built to manage Varnish Enterprise architectures of any size. Packed with...
Fastly VCL is a domain-specific programming language which has evolved from the Varnish proxy cache, which is part of...
As a Solutions Architect, Web Developer or Performance Engineer, you have many ways to deliver web pages, applications...
Varnish Software
Varnish Software Partners
CDN
varnish enterprise
high performance
Varnish Features
Varnish Controller
Traffic Router
greening of streaming
Calling 2022 a “big year” for Varnish Software would be an understatement. Over the last 12 months, we’ve experienced...
origin shield
Black Friday
retail web performance
web performance black friday
always on retail
ecommerce
Another Black Friday has come and gone, along with its sister shop-holiday Cyber Monday. Although with the continued...
Varnish Software
website performance
caching for web performance
Varnish solutions
varnish enterprise
Accelerate Your Internal IT Processes Your IT team is the lifeblood of your company, and their ability to efficiently...
GraphQL is a query language and server-side runtime for APIs, designed to give clients the specific data they need and...
Have you been trying to figure out how you can easily use Varnish Controller with docker-compose? This article walks...
Earlier this month, Varnish Software was delighted to attend the Greening of Streaming launch at the UK parliament. The...
Black Friday and Cyber Monday are six months away. However distant this may seem, wheels across the entire e-commerce...
This week's episode of Two-Minute Tech Tuesday is about ActiveDNS (vmod_activedns), a Varnish Enterprise VMOD that...
Hot on the heels of a major Varnish Controller release, a series of updates to Varnish Enterprise are now available!...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about UDO which is short for "Unified Director Object"....
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about varnishncsa, a tool that you can use to produce web...
Quality content drives valuable action. Whether that action is a download, install, view, subscription or purchase,...
The Varnish Controller is our administration solution for managing large Varnish Enterprise environments, offering...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about backend health. Specifically, backend logs, health...
As the company behind the Varnish Cache open source project, we do our fair share of contributing to the open source...
Varnish is a software-defined solution for all kinds of web performance challenges. As flexible caching software, it...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about getting stuck in an infinite redirect loop, an...
In this week’s episode of Two-Minute Tech Tuesday, we'll continue the conversation about JSON Web Tokens. Last week, we...
Data privacy has never been hotter as a topic, in part because the US CLOUD Act came into force, making organizations...
In this week’s episode of Two-Minute Tech Tuesday, we'll introduce you to JSON Web Tokens and demonstrate how to...
The “death of TV” has long been predicted, and peak multi-device/mobile OTT streaming may finally ring the death knell...
In a previous blog post, we explained the difference between the loading speed of a page and the perceived loading...
In this blog post we’re exploring some aspects of Varnish Enterprise that enable what it is best known for: excellent...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about basic authentication, and how to use Varnish as an...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about the Transit Buffer. The Transit Buffer is a Varnish...
Today’s release of Varnish Controller 4.0 is a milestone for us at Varnish Software.
Delivering Game-Changing Performance Improvements and Competitive Advantage for Online Retail As the penetration of...
As a company, we operate in the web acceleration and content delivery space. Our mission is to speed up the delivery of...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about Memory Governor. The Memory Governor is a Varnish...
When COVID-related lockdowns were introduced, and people started living their full lives at home, digitally connecting...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about prefetching, a concept of proactively fetching...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about Hitch. Hitch is an open-source TLS proxy that...
The Time to First Byte (TTFB) is the amount of time between sending a request to a server and receiving the first byte...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about the PROXY protocol. The PROXY protocol transports...
In this week’s episode of Two-Minute Tech Tuesday, we'll talk about varnishstat, a tool that displays Varnish...
Welcome back to Two-Minute Tech Tuesday! In this week’s episode, we'll take a closer look at Ykey. Ykey is a Varnish...
Varnish Software
Varnish Software Partners
CDN
news
webinar
high performance
Varnish Features
varnish controller 3.0
Traffic Router
This blog post covers some of our most important news and most popular content from 2021. Read on to catch up the new...
In this week’s Two Minute Tech Tuesday, we'll talk about synthetic responses. These are responses that didn't originate...
Many enterprises these days use what we call a multi-CDN strategy to ensure content reaches their audience reliably....
In this week’s episode of Two-Minute Tech Tuesday, we're explaining how the total lifetime of a cached object is...
Is the traditional Black Friday holiday spending extravaganza dead? Is the decline in Cyber Five spending experienced...
This week’s episode of Two Minute Tech Tuesday demonstrates how to run Varnish on the Digital Ocean cloud by using the...
When you think of caching proxies and software for speeding up your website, you think about Varnish and Squid. But how...
We’re happy to announce a new Varnish Enterprise release! Version 6.0.9r1 introduces the Slicer VMOD (which joins the...
This week’s episode of Two Minute Tech Tuesday explains how the built-in Varnish Configuration Language (VCL) works....
In this week’s Two Minute Tech Tuesday, we're talking about cache variations.
In this week’s Two Minute Tech Tuesday, we're discussing the official Varnish Enterprise image on the Oracle Cloud...
In this blog series, we’ve been looking inside Varnish to see what’s under the hood. There’s a lot more going on than...
While predictions about edge computing and 5G changing the face of m-commerce are already coming true, the potential of...
In this week’s Two Minute Tech Tuesday, we're talking about the Cache-Control header which is returned by the origin...
Online retail can be unpredictable, which is why strategizing and optimizing your setup to ensure uptime, and in the...
While we have spent some time explaining all the surprising things that the Varnish private CDN solution contains under...
In this week’s Two Minute Tech Tuesday, we're going to revisit the cloud. We've already done three episodes about...
Content delivery networks (CDNs) can be much more than just the workhorse of content delivery. Sure, that’s what they...
This week's 2-Minute Tech Tuesday features the official Docker image for Varnish. We'll explain what Docker is, how it...
Getting all the elements of a consumer-friendly, high-performance online retail experience right is a technical...
Content can’t be king without the CDN In mid-2021 a handful of catastrophic commercial CDN outages made the world take...
In this week's episode of 2-Minute Tech Tuesday, we're showing you how to run Varnish in the cloud on Microsoft Azure...
Many Varnish users experience Varnish only as an HTTP reverse proxy. Widely adopted to be the middle man sitting...
For online retail companies, downtime is the worst-case scenario. Downtime or traffic slowdowns lead to a number of...
In this week's episode of 2-Minute Tech Tuesday, we're showing you how to run Varnish in the cloud on Amazon Web...
We’re pleased to announce the latest release of Varnish Controller - our administration console for managing Varnish...
In this week's 2-Minute Tech Tuesday, we'll introduce "Varnish Cloud", a Varnish Software product that offers Varnish...
varnish installation
2MTT
installing varnish on Red Hat Enterprise Linux
installing varnish on centOS
In this week's 2 Minute Tech Tuesday, we'll be talking about installing Varnish on CentOS and Red Hat Enterprise Linux.
One of the most important tools in securing high-performance web content delivery is caching. But when we talk about...
Varnish Enterprise is now available via Oracle Cloud Marketplace on a pay-as-you-go basis, for accelerating content...
In this week's 2 Minute Tech Tuesday, we'll be talking about installing Varnish on Debian and Ubuntu Linux systems.
Varnish Massive Storage Engine
video streaming
streaming video bandwidth
Top Ten Features of Varnish
How do the biggest video-streaming platforms in the world manage to store so much video and serve it so fast to such...
In this week's 2-Minute Tech Tuesday, we'll be discussing banning, which is a mechanism in Varnish to remove outdated...
Do you have a need to dive deeper into Varnish and what it can do, but you’re not sure where to find the right...
Downtime is always bad, and you want to avoid it. But sometimes you can get away with it. This is one of the magic...
In this week's 2-Minute Tech Tuesday we'll be talking about "purging", which is Varnish's built-in mechanism to remove...
Although it’s not a traditional cybersecurity method, origin shielding lets you protect your origin server(s) from...
How can you tell whether bots visiting your website actually are who they say they are? Are they bad bots with...
Transport layer security (TLS) is the de facto standard for sending and receiving secure HTTP traffic. With this in...
This week's topic is about cookies, a surprisingly challenging topic when it comes to caching.
It’s not unusual for companies to want to understand their web traffic in greater depth. Being able to collect...
Cybersecurity requires more than just a single action or approach because threats exist on many levels. Some of the...
This week’s episode is about Grace mode, Varnish’s interpretation of stale-while-revalidate.
cache invalidation
caching for web performance
web security
high performance
Top Ten Features of Varnish
Securing high performance and speed for web content delivery relies on smart caching strategies. Caching content is a...
cybersecurity
authentication
authorization
Varnish for authentication and authorization
Summer of Security
Authentication and authorization policies exist in companies of all types and sizes to govern access control and...
This week’s episode is about VCL — the Varnish Configuration Language — which is used to define your own caching...
The market for cybersecurity solutions never declines; there are always new and more malicious threats around the next...
This week's episode is about load balancing, which is a concept where traffic load gets distributed to a collection of...
The statistics around data breaches and personal information misuse are alarming. In the United States alone, there is...
This week’s episode is about the Varnish Controller, an administration console that simplifies the process of managing...
Recently, Varnish Software and Intel announced a major step forward for streaming (and content) delivery, reaching...
Today's episode is about Varnish Discovery, but before we can talk about Discovery, we need to look back at last week's...
While new cybersecurity threats emerge all the time, some long-standing basic threats have never gone away. The humble...
This week's episode of 2 Minute Tech Tuesdays is about the Varnish Broadcaster, a Varnish Enterprise tool that...
As the primary sponsors and developers behind the open-source Varnish Cache project, and providers of the commercial...
Until recently, most users of private CDN solutions have had unique use cases, requiring flexibility and...
This episode of Two Minute Tech Tuesdays is about request coalescing, a core feature in Varnish that is used to reduce...
As principal members of the Streaming Video Alliance (SVA), Varnish Software supports all standardization and...
*Last Updated 21/06/2022* Origin shield technology isn’t new, and many companies already rely on origin shielding to...
In this week's episode of Two Minute Tech Tuesdays, we're looking at parallel ESI (Edge Side Includes).
Whether you have one CDN or many, an origin shield is a must-have as part of your resilience and risk mitigation...
In this episode we'll be looking at dynamic backends. Dynamic backends in Varnish allow backends to be defined on the...
The Fastly CDN outage on June 8th, which took down a major part of the internet, including popular websites and...
In this episode we’ll be talking about Varnish High Availability.
VCL or "Varnish Configuration Language" is an absolutely brilliant idea, which I may have said once or twice already,...
A new version of Varnish Enterprise, release 6.0.8r2, is available now! It adds new Varnish modules (VMODs), features,...
Whether you deploy a single CDN or rely on a multi-CDN strategy, an origin shield is a must-have to reduce the load on...
Transit Buffer is a feature available in Varnish Enterprise release 6.0.8r2. Read more here.
For network operators and ISPs, revenue margins are narrowing in hyper-competitive markets. At the same time, capital...
Video streaming has overtaken all other use cases in its digital dominance, accelerated by the challenges of...
In 2016, in line with UN Sustainable Development Goals (SDGs), the mobile industry as a whole committed to working...
While not classified as a traditional cybersecurity method, an origin shield can help mitigate the effects of both...
As a society we’ve come to depend so much on cloud computing that we think of it as a “set and forget” resource (if we...
An origin shield is a protective measure that shields your origin server(s) from overload, ensuring high availability,...
Did you know that Hitch is now available as a container image on the dockerhub? I'm asking because it's time to revisit...
video delivery
ott streaming
varnish for streaming
live video content delivery
video on demand
live video streaming
OTT video streaming
In the diverse Asia-Pacific (APAC) region, over-the-top (OTT) video streaming has exceeded growth expectations and...