Migrating cdnjs to serverless with Workers KV

Migrating cdnjs to serverless with Workers KV

Cloudflare powers cdnjs, an open-source project that accelerates websites by delivering popular JavaScript libraries and resources via Cloudflare’s network. Since our major update in December, we focused on remodelling cdnjs for scalability and resilience. Today, we are excited to announce how Cloudflare delivers cdnjs—a migration to a serverless infrastructure using Cloudflare Workers and its distributed key-value store Workers KV!

What is cdnjs?

Migrating cdnjs to serverless with Workers KV

For those unfamiliar, cdnjs is an acronym describing a Content Delivery Network (CDN) for JavaScript (JS). A CDN simply refers to a geographically distributed network of servers that provide Internet content, whether it is memes, cat videos, or HTML pages. In our case, the CDN refers to Cloudflare’s ever expanding network of over 200 globally distributed data centers.

And here’s why this is relevant to you: it makes page load times lightning-fast. Virtually every website you visit needs to fetch JS libraries in order to load, including this one. Let’s say you visit a Sydney-based website that contains a local file from jQuery, a popular library found in 76.2% of websites. If you are located in New York, you may notice a delay, as it can easily exceed 300ms to fetch the file—not to mention Continue reading

Telehealth usage soars during COVID-19

Internet-based virtual healthcare, sometimes called telehealth or telemedicine, has seen a massive increase in usage during the pandemic, according to new research.A study by University of Michigan's National Poll on Healthy Aging (NPHA) found that a quarter of older adults aged between 50 and 80 had a virtual medical visit over a network in the first three months of the coronavirus pandemic. By comparison, in a similar poll from 2019, just 4% of people over 50 said they had ever had a virtual visit with a doctor. READ MORE: Pandemic reveals the need for better telemedicineTo read this article in full, please click here

Disaster Recovery: a Vendor Marketing Tale

Several engineers formerly working for a large virtualization vendor were pretty upset with me when I claimed that the virtualization consultants promote “disaster recovery using stretched VLANs” designs instead of alternatives that would implement proper separation of failure domains.

Guess what… it’s even worse than I thought.

Here’s a sequence of comments I received after reposting one of my “disaster recovery doesn’t need stretched VLANs” blog posts on LinkedIn sometime in late 2019:

Read more …

DNS Query Privacy Revisited

A year has passed since we first looked at the level of use of Query Name Minimisation in the DNS and at the time the results were not impressive. It's time to relook at this topic and see what has changed in the DNS resolution environment over the past 12 months.

A smarter emacs

I’ve been running Emacs for like 25 years. But I’ve never really configured it with anything fancy.

Sure, I’ve set some shortcut keys, and enabled global-font-lock-mode and set indent size, but that’s almost it.

All my coding is done in tmux&Emacs. One project gets exactly one tmux session. Window 0 is emacs. Window 1 is make && ./a.out (sometimes split panes to tail logs or run both server and client), and to run git commands. The remaining windows are used for various things like reading manpages etc….

I have that same workflow whether I’m editing a blog post or doing kernel programming.

This way I can work at my desk with large and plentiful screens, and then move to my laptop and everything continues working exactly the same.

tmux I’ve customized, but not that much with Emacs.

So, step one to get my coding environment to be less 1995, and more 2020: make my editor understand my code, and show me stuff about it.

I’m learning as I’m going, and writing what I’m learning. As always if you see something wrong then please leave a comment.

Code annotations and other semantic understanding

The way to do this is Continue reading

Spotlight on NSX Performance at VMworld 2020

As we ramp up towards one of the premiere online tech events — in one of the most extraordinary years of a lifetime — I would like to shine a spotlight on what is being planned around NSX performance during this year’s virtual conference to help you get the most out of the event. VMWorld 2020 is right around the corner — and for the first time in two decades, it’s free! So, Register Now if you haven’t done so already!

NSX Performance Thus Far

Over the years, we’ve looked at the NSX performance numbers with and without hardware-level features, such as Geneve Offload and Geneve Rx Filters, that are key to optimal performance. If these topics are new to you, I would encourage reading up on the performance section of the NSX-T Reference Design Guide for a working knowledge of NSX-T performance before attending this year’s NSX-T Performance Session at VMworld.

NSX-T Performance Session at VMworld 2020

Given the virtual format of this year’s NSX-T Performance Session, I’ve decided to take a slightly different approach. Not only will I share performance numbers, but I’ll also demonstrate how different hardware-level features influence performance, and I’ll discuss feature and tuning Continue reading

My Thoughts on LinkedIn in 2020

LinkedIn originated with a focus on connecting professionals and contacts were supposed to be people that you know or worked with. The early team worked hard to build a monopoly/network effect around business connections.  Much of LinkedIn’s interface usability stems from that design intention. Now there is tension between what was LinkedIn was 10 years […]

Developer Channel at AnsibleFest 2020

As a developer, have you ever made a change that takes down an entire Kubernetes production cluster, requiring you to rebuild all YAML and automation scripts to get production back up?  Have you ever wanted to create reproducible, self-contained environments that can be run locally or in production? Welcome to the new AnsibleFest Developer Channel! Here you can learn how Ansible is critical to the journey of the developer as an open-source software configuration management, provisioning and application-deployment tool that enables infrastructure as code.  

 

Ansible Developer Channel

Many themes will be presented in the Ansible Developer Channel, including Kubernetes operations, Red Hat Ansible Automation Platform use cases, as well as execution speed and development efficiency considerations. You can learn how Ansible can streamline Kubernetes Day 2 Operations, where monitoring, maintenance and troubleshooting come into play and the application moves from a development project to an actual strategic advantage for your business. You will also learn how Ansible execution environments solve problems for developers using Ansible Automation Platform and how to create self-contained environments that can be run locally or in production Red Hat Ansible Tower deployments. In addition, you can learn how to optimize execution speed and Continue reading

New Arm processor promises smart storage

Arm Ltd. last week announced the Cortex-R82, a chip that is both storage and data processing-capable, which could enable a whole new generation of storage devices that help process the data they store.Storage processor chips, such as those made by Marvell but also storage device makers like EMC, handle the I/O and disk management, but if you want to process the data, that job falls to the CPU. This means data has to be moved in and out of the drive to be processed, a job that falls to two separate devices.But there is an emerging hardware category known as computational storage where the processing is done where the data resides, rather than moving it into memory. Data is processed through various methods, like indexing and schema, eliminating the latency of data movement and freeing up the CPU. Obviously this can only be done on SSDs.To read this article in full, please click here

New Arm processor promises smart storage

Arm Ltd. last week announced the Cortex-R82, a chip that is both storage and data processing-capable, which could enable a whole new generation of storage devices that help process the data they store.Storage processor chips, such as those made by Marvell but also storage device makers like EMC, handle the I/O and disk management, but if you want to process the data, that job falls to the CPU. This means data has to be moved in and out of the drive to be processed, a job that falls to two separate devices.But there is an emerging hardware category known as computational storage where the processing is done where the data resides, rather than moving it into memory. Data is processed through various methods, like indexing and schema, eliminating the latency of data movement and freeing up the CPU. Obviously this can only be done on SSDs.To read this article in full, please click here

The Hedge Podcast 51: Tim Fiola and pyNTM

Have you ever looked at your wide area network and wondered … what would the traffic flows look like if this link or that router failed? Traffic modeling of this kind is widely available in commercial tools, which means it’s been hard to play with these kinds of tools, learn how they work, and understand how they can be effective. There is, however, an open source alternative—pyNTM. While this tool won’t replace a commercial tool, it can give you “enough to go on” for many network operators, and give you the experience and understanding needed to justify springing for a commercial product.

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Day Two Cloud 065: Building Your Cloud On-Ramp With SD-WAN

SD-WAN vendors offer a variety of mechanisms to connect end users to cloud applications while incorporating policy and performance requirements. Day Two Cloud co-host Ethan Banks interviewed many of these vendors to understand the architectural nitty-gritty of different approaches. In this episode, he shares the fruits of his research.

The post Day Two Cloud 065: Building Your Cloud On-Ramp With SD-WAN appeared first on Packet Pushers.

Unimog – Cloudflare’s edge load balancer

Unimog - Cloudflare’s edge load balancer

As the scale of Cloudflare’s edge network has grown, we sometimes reach the limits of parts of our architecture. About two years ago we realized that our existing solution for spreading load within our data centers could no longer meet our needs. We embarked on a project to deploy a Layer 4 Load Balancer, internally called Unimog, to improve the reliability and operational efficiency of our edge network. Unimog has now been deployed in production for over a year.

This post explains the problems Unimog solves and how it works. Unimog builds on techniques used in other Layer 4 Load Balancers, but there are many details of its implementation that are tailored to the needs of our edge network.

Unimog - Cloudflare’s edge load balancer

The role of Unimog in our edge network

Cloudflare operates an anycast network, meaning that our data centers in 200+ cities around the world serve the same IP addresses. For example, our own cloudflare.com website uses Cloudflare services, and one of its IP addresses is 104.17.175.85. All of our data centers will accept connections to that address and respond to HTTP requests. By the magic of Internet routing, when you visit cloudflare.com and your Continue reading

Where Do We Need Smart NICs?

We did a number of Software Gone Wild podcasts trying to figure out whether smart NICs address a real need or whether it’s just another vendor attempt to explore all potential markets. As expected, we got opposing views from Luke Gorrie claiming a NIC should be as simple as possible to Silvano Gai explaining how dedicated hardware performs the same operations at lower cost, lower power consumption and way higher speeds.

In theory, there’s no doubt that Silvano is right. Just look at how expensive some router line cards are, and try to figure out how much it would cost to get 25.6 Tbps of forwarding performance that we’ll get in a single ASIC (Tomahawk-4) in software (assuming ~10 Gbps per CPU core). High-speed core packet forwarding has to be done in dedicated hardware.

Read more …

How Do We Ensure the Internet Grows and Improves? Start with the Internet Impact Assessment Toolkit

photo of looking up in a group of trees

The Internet has been revolutionary for human progress. Bit by bit, byte by byte, it has come to underpin modern life. For those of us online today it is hard to imagine (or remember) a world where the Internet was not the fabric of our social lives, education, entertainment, innovation, and culture. But what makes the Internet such a success, and how can we ensure its future? What takes a “network of networks” and makes it the Internet? We’ve launched the Internet Way of Networking’s Internet Impact Assessment Toolkit (IIAT) to to help answer that question.

The current pandemic has showed us both the value and the opportunities the Internet holds. For societies to pivot to a reality where most of our lives became digital overnight is a true testament to the possibilities that are inherent in the Internet.

But while the Internet has proved its resilience under the weight of an online society, it is easy to forget that its fundamental premise is not about cables and computers, but about collaboratively interconnecting independent networks to a greater whole. Because what fundamentally makes up the Internet, and what it could grow to become in the future, is rooted in its Continue reading

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