Dynatrace

JUNE 1, 2023

These organizations rely heavily on performance, availability, and user satisfaction to drive sales and retain customers. Availability Availability SLO quantifies the expected level of service availability over a specific time period. Availability is typically expressed in 9’s, such as 99.9%. or 99.99% of the time.

Latency 182

Latency Website Traffic Virtualization 182

Dynatrace

JUNE 1, 2023

These organizations rely heavily on performance, availability, and user satisfaction to drive sales and retain customers. Availability Availability SLO quantifies the expected level of service availability over a specific time period. Availability is typically expressed in 9’s, such as 99.9%. or 99.99% of the time.

Traffic 173

Traffic Latency Website Virtualization 173

The Netflix TechBlog

JUNE 5, 2023

Problem Netflix’s content catalog is composed of video captured and encoded in one of various frame rates ranging from 23.97 24→60, 25→60, etc…), which manifests as choppy video playback as illustrated below: With Judder Without Judder It is important to note that the severity of the judder depends on the replication pattern.

Entertainment 306

Entertainment Engineering Technology Technology 306

The Netflix TechBlog

MARCH 14, 2023

An example of using Machine Learning to find shots of Eleven in Stranger Things and surfacing the results in studio application for the consumption of Netflix video editors. We must quickly surface the most stand-out highlights from the titles available on our service in the form of images and videos in the member experience.

Media 291

Media Innovation Energy Architecture 291

Speed Curve

DECEMBER 19, 2023

This should do it: I submit the PR with the changes and verify that the deployment was successful in GitHub: Navigating to my SpeedCurve Deployments dashboard, I see that a deploy has automatically been created and it is in queue for testing. I find what I was after when I view the test details for that deployment.

Performance Testing 62

Performance Testing Testing Performance Mobile 62

The Netflix TechBlog

MAY 21, 2019

using RL agents for test case scheduling By: Stanislav Kirdey , Kevin Cureton , Scott Rick , Sankar Ramanathan Introduction Netflix brings delightful customer experiences to homes on a variety of devices that continues to grow each day. Detect a regression in a test case. These problems could be solved in several different ways.

Testing 163

Testing AWS Lambda Network 163

Alex Podelko

SEPTEMBER 8, 2020

Some time ago Federico Toledo published Performance Testing with Open Source Tools- Busting The Myths. I remember really liking the technical side of these tests. But I must confess I was not too fond of having to report the results to stakeholders or deal with political/personal issues related to (poor) test results.

Open Source 223

Open Source Performance Testing Testing Performance 223

The Netflix TechBlog

MAY 1, 2019

Most conversations about streaming quality focus on video. We’re really proud of the improvements we’ve brought to the video experience, but the focus on those makes it easy to overlook the importance of sound , and sound is every bit as important to entertainment as video. is the story nearly as thrilling and emotional?

Engineering 274

Engineering Network Media Entertainment 274

The Netflix TechBlog

NOVEMBER 9, 2021

by Liwei Guo , Ashwin Kumar Gopi Valliammal , Raymond Tam , Chris Pham , Agata Opalach , Weibo Ni AV1 is the first high-efficiency video codec format with a royalty-free license from Alliance of Open Media (AOMedia), made possible by wide-ranging industry commitment of expertise and resources. Video encoding is essentially a search problem?—?the

Media 246

Media Open Source Efficiency Software Engineering 246

Dynatrace

JULY 16, 2021

This week my colleague Michael Winkler announced the general availability of Cloud Automation quality gates , a new capability that aims to provide answer-driven release validation as part of your delivery process. Let’s Start: Answer driven automation – your full video tutorial. 01:19 – Introducing Shift-Left SLO Quality Gates.

DevOps 245

DevOps Open Source Cloud Azure 245

Testsigma

DECEMBER 12, 2020

Cross browser testing can be a real headache for a software tester. You may have tested your application on the latest versions of Chrome, Firefox, and Edge, but more often than not, some browsers such as Internet Explorer, Opera Mini, UC Browser get missed out. Cross-Browser Testing Abilities. Parallel Test Execution.

Testing Tools 93

Testing Tools Testing Operating System Internet 93

The Netflix TechBlog

APRIL 17, 2019

What does this example have to do with software development and video encoding? Intel and Netflix announced their collaboration on a software video encoder implementation called SVT-AV1 on April 8, 2019. The first successful digital video standard was MPEG-2, which truly enabled digital transmission of video.

Open Source 166

Open Source Scalability Speed Efficiency 166

The Netflix TechBlog

AUGUST 17, 2023

From our testing on promotional assets , we know which of these assets have performed well and which ones haven’t. Our assets are often created by selecting static image frames directly from our source videos. Intro to AVA Discovery View AVA is an internal tool that surfaces still frames from video content.

Media 169

Media Scalability Architecture Strategy 169

The Netflix TechBlog

APRIL 26, 2022

Figure 1: Netflix ML Architecture Fact: A fact is data about our members or videos. An example of data about members is the video they had watched or added to their My List. An example of video data is video metadata, like the length of a video. Unit tests and integration tests only took us so far.

Storage 187

Storage Design Scalability Latency 187

CSS Wizardry

MAY 19, 2020

Their ability to serve the tiniest possible font files tailored to specific user agents and platforms is amazing, and with such a huge, freely-available library served from Google-grade CDNs… I definitely see why people continue to turn to it. I ran the same suite of tests against the harry.is and csswizardry.com homepages. Lighthouse.

Google 364

Google Media Latency Metrics 364

Testsigma

JUNE 12, 2021

A recommended approach for considering a user story complete is when the corresponding feature that was being developed, is tested and automated too. When all of these activities for a story are planned for a sprint, the test automation comes to be known as ‘insprint test automation’.

Testing 95

Testing Cloud Infrastructure Technology 95

Dynatrace

AUGUST 27, 2020

The team behind Dynatrace University has always pushed themselves to achieve more and provide its users with up to date content.And with that, we’re excited to announce Dynatrace University 2020 is now available! Multi-language certifications and microlearning videos. Have you ever tried to take a test in your second language?

Education 147

Education Virtualization Programming Availability 147

The Netflix TechBlog

SEPTEMBER 8, 2020

As an example, to render the screen shown here, the app sends a query that looks like this: paths: ["videos", 80154610, "detail"] A path starts from a root object , and is followed by a sequence of keys that we want to retrieve the data for. Instead, it is part of a different path : [videos, <id>, similars].

Latency 233

Latency Cache Java Traffic 233

The Netflix TechBlog

MARCH 1, 2021

When Reloaded was designed, we were a small team of developers operating a constrained compute cluster, and focused on one use case: the video/audio processing pipeline. Local development tools including specialized test runners, code generators, and a command line interface. Productivity?—?Local Delivery?—?A debian packages).

Serverless 228

Serverless Media Latency Social Media 228

The Netflix TechBlog

JANUARY 11, 2022

Here we describe the role of Experimentation and A/B testing within the larger Data Science and Engineering organization at Netflix, including how our platform investments support running tests at scale while enabling innovation. What more can we learn from this test, to inform the next one?”

Innovation 243

Innovation Metrics Engineering Testing 243

Testsigma

MAY 5, 2021

To ensure the features run uniformly across various browsers and OS versions that our users have, we should perform multi-browser testing. Let us understand the importance of multi-browser testing before we proceed. You can also check out our post on the most common issues one can face while performing browser compatibility tests.

Testing Tools 74

Testing Tools Testing Internet Internet 74

The Netflix TechBlog

JUNE 13, 2023

Our previous blog post presented replay traffic testing — a crucial instrument in our toolkit that allows us to implement these transformations with precision and reliability. Compared to replay testing, canaries allow us to extend the validation scope beyond the service level.

Traffic 279

Traffic Metrics Systems Strategy 279

Dynatrace

DECEMBER 27, 2022

Stable, well-calibrated SLOs pave the way for teams to automate additional processes and testing throughout the software delivery lifecycle. According to Google’s SRE handbook , best practices, there are “ Four Golden Signals ” we can convert into four SLOs for services: reliability, latency, availability, and saturation.

Software 269

Software Software Benchmarking Latency 269

KeyCDN

FEBRUARY 14, 2019

Thanks to their simplicity and widespread support, GIF files remain wildly popular despite the dozens of other image and video formats available today. There’s a debate among web developers whether or not animated image formats should be ditched altogether in favor of video formats.

Speed 50

Speed Website Latency Cache 50

Testsigma

FEBRUARY 11, 2021

Cross Browser Testing also known as cross browser compatibility testing is all about creating a consistent experience for users across all browsers – but the question is how do you do that efficiently? Cross Browser compatibility testing helps us to pin-point compatibility errors which helps the developers to debug them quickly.

Testing Tools 93

Testing Tools Testing Efficiency Cloud 93

Testsigma

SEPTEMBER 23, 2021

Cross-browser testing is performed to be sure that your product is working as expected on the various device, platform, and browser (and their versions) combinations that your customers might be using. However, the pain and efforts associated can be reduced, if the cross-browser testing is cloud-based. Reference: [link].

Cloud 96

Cloud Testing Infrastructure Internet 96

Testsigma

FEBRUARY 7, 2022

To meet this demand, tester’s rely on test automation tools to rapidly roll out high-quality software. They are leveraging open-source testing tools that are reliable, secure, and free to use. Open source test automation tools have revolutionized the way teams test software. Check out Github.

Open Source 81

Open Source Testing Innovation Speed 81

Testsigma

SEPTEMBER 9, 2021

Cloud testing, in simple terms, means testing software applications using the resources provided by the cloud. Resources can be any element i.e., hardware, software, or infrastructure which are necessary to carry out tests. Cloud testing helps an organization gain competitiveness by reducing the cost of testing.

Cloud 59

Cloud Testing Mobile Scalability 59

Smashing Magazine

JULY 2, 2021

Email Testing Flow As It Should Be. Email Testing Flow As It Should Be. By testing every single email aspect! Unfortunately, email testing is often underestimated and leads to email testing mistakes that kill all your effort spent on creating a great email sequence. Let’s talk email testing! It’s doubtful.

Testing 110

Testing Servers Social Media Automotive 110

Testsigma

DECEMBER 28, 2020

But the question is, how to perform such exhaustive testing? Nowadays, to perform responsive checks, there are amazing testing tools, which ensures that your web applications are optimized for all the devices. In this article, we will run you through a curated selection of 7 premium tools for performing responsiveness testing.

Design 88

Design Testing Website Testing Tools 88

The Netflix TechBlog

FEBRUARY 14, 2020

Below, we discuss how we’ve built upon our previous work of harvesting static images directly from video source files and our computer vision algorithms to produce a set of artwork candidates that covers the major product canvases for the entire content catalog. We use an open source workflow engine Netflix Conductor to run the orchestration.

Design 182

Design Open Source C++ Availability 182

Dynatrace

OCTOBER 11, 2021

In recent years, function-as-a-service (FaaS) platforms such as Google Cloud Functions (GCF) have gained popularity as an easy way to run code in a highly available, fault-tolerant serverless environment. GCF pairs well with Google Cloud Build, which enables testing and other CI/CD tasks based on functions originating in GCF.

Google 227

Google Cloud Serverless Azure 227

Dynatrace

JUNE 28, 2022

With this approach, teams can scale testing for all environments, which reduces efforts in replicating, updating, and maintaining test scripts. The ability to scale testing as part of the software development lifecycle (SDLC) has proven difficult. No external tools or additional configurations are needed.

Monitoring 206

Monitoring Software Software DevOps 206

The Netflix TechBlog

JANUARY 25, 2022

Earlier posts covered the basics of A/B tests ( Part 1 and Part 2 ), core statistical concepts ( Part 3 and Part 4 ), how to build confidence in a decision ( Part 5 ), and the the role of Experimentation and A/B testing within the larger Data Science and Engineering organization at Netflix ( Part 6 ).

Education 238

Education Innovation Testing Programming 238

Smashing Magazine

SEPTEMBER 8, 2021

It consists of an image or video on the left and a column on the right containing a heading, a paragraph of text and a call-to-action link. Continue reading below ↓ Meet Smashing Online Workshops on front-end & UX , with practical takeaways, live sessions, video recordings and a friendly Q&A. The Design. More after jump!

Development 139

Development Media Design Mobile 139

Testsigma

FEBRUARY 19, 2021

With the rising competition in the app industry, mobile testing without automation seems out of the picture. You can’t imagine frequent deployments or a faster time to market without automating your tests. There are plenty of automation tools and frameworks available in the market for both Android and iOS. Source: Medium.com.

Testing Tools 57

Testing Tools Mobile Testing Java 57

Testsigma

JANUARY 21, 2021

This creates a need to perform thorough testing of mobile applications and their usability. In this article, we will discuss how we can perform mobile usability testing that would enable us to create applications that live up to the user’s standards. What is mobile usability testing? Objectives of the usability test.

Mobile 95

Mobile Testing Social Media Media 95