The Netflix TechBlog

SEPTEMBER 8, 2020

Migration Testing Infrastructure Our monolith had been around for many years and hadn’t been created with functional and unit testing in mind, so those were independently bolted on by each UI team. For the migration, testing was a first-class citizen. Replay Testing Enter replay testing.

Latency 233

Latency Cache Java Traffic 233

Dynatrace

SEPTEMBER 30, 2021

Hosted and moderated by Amazon, AWS GameDay is a hands-on, collaborative, gamified learning exercise for applying AWS services and cloud skills to real-world scenarios. Take a trial test at Linux Academy if it’s applicable to the cert you have in mind. As of June 2021, Amazon currently offers 11 certifications.

AWS 212

AWS Best Practices Analytics Cloud 212

The Netflix TechBlog

FEBRUARY 10, 2021

Stranger Things imagery showcasing the inspiration for the Hawkins Design System by Hawkins team member Joshua Godi ; with art contributions by Wiki Chaves Hawkins may be the name of a fictional town in Indiana, most widely known as the backdrop for one of Netflix’s most popular TV series “Stranger Things,” but the name is so much more.

Design 230

Design Systems Engineering Entertainment 230

Adrian Cockcroft

MARCH 17, 2020

Picture taken by Adrian March 17, 2020 A resilient system continues to operate successfully in the presence of failures. There are many possible failure modes, and each exercises a different aspect of resilience. Hence, one way to reduce risk is to make systems more observable. The first technique is the most generally useful.

Healthcare 52

Healthcare Government Airlines Systems 52

HammerDB

APRIL 19, 2023

Instead, focus on understanding what the workloads exercise to help us determine how to best use them to aid our performance assessment. Therefore, before we attempt to measure our database performance, we should know the system or cloud instance to be tested in detail. Operating System: Ubuntu 22.04

Performance 54

Performance Benchmarking Cache Storage 54

O'Reilly

DECEMBER 12, 2023

This ruling in itself raises many questions: how much creativity is needed, and is that the same kind of creativity that an artist exercises with a paintbrush? I can also ask for a reading list about plagues in 16th century England, algorithms for testing prime numbers, or anything else.

Artificial Intelligence 101

Artificial Intelligence Media Google Processing 101

Dynatrace

SEPTEMBER 20, 2019

Welcome back to the blog series in which we show how you can easily solve three common problem scenarios by using Dynatrace and xMatters Flow Designer. The new version of the application is deployed in the green environment and tested for functionality and performance. Step 6 — Flow Designer rolls back through keptn.

Systems 26

Systems Traffic DevOps Database 26

The Agile Manager

AUGUST 31, 2021

If we accept the fact that Agile is a value system and not a set of mechanical processes, it stands to reason that there must be something different about the norms and behaviors of Agile managers vis-a-vis traditional managers. An Agile story is an expression of end-to-end business need.

Metrics 52

Metrics Design Engineering C++ 52

Sutter's Mill

JANUARY 11, 2021

Note that “no side effects on normal execution” is always automatically true for violation handlers even when an assertion system such as proposed in [4] allows arbitrary custom violation handlers to be installed, because those are executed only if we discover that we’re in a corrupted state and so are already outside of normal execution. [5]

C++ 58

C++ Programming Code Testing 58

Particular Software

DECEMBER 9, 2019

Decommissioning Public102 was an exercise in the mundane, gradually transitioning tiny service after tiny service to new homes over the course of weeks, as the development schedule allowed. From Udi Dahan's Advanced Distributed Systems Design Course , Day 1 Embrace change The only constant in the universe is change.

Wireless 52

Wireless DevOps Infrastructure Network 52

Testlodge

AUGUST 9, 2023

Basis path testing in software testing is a white box method where the tester examines the codebase to identify all possible paths that could be taken by the user to achieve their aims. These paths are then written as test cases to ensure all the different identified scenarios in the main branches are covered.

Testing 75

Testing Software Software C++ 75

Smashing Magazine

AUGUST 5, 2021

Frustrating Design Patterns: Disabled Buttons. Frustrating Design Patterns: Disabled Buttons. After all, as designers and developers, we want to make it more difficult for our users to make mistakes. Part Of: Design Patterns. And because something is happening, they usually exercise a good amount of patience first.

Design 145

Design Transportation Code Systems 145

Particular Software

SEPTEMBER 11, 2023

Migrating a message-based system from on-premises to the cloud is a colossal undertaking. If you search for “how to migrate to the cloud”, there are reams of articles that encourage you to understand your system, evaluate cloud providers, choose the right messaging service, and manage security and compliance.

Cloud 126

Cloud Systems Azure Airlines 126

The Agile Manager

AUGUST 31, 2020

I've worked with quite a few companies for which long-lived software assets remain critical to day-to-day operations, ranging from 20-year-old ERP systems to custom software products that first processed a transaction way back in the 1960s. The first and most obvious is that they are long on how to start, but short on how to finish.

Architecture 52

Architecture Code Strategy Programming 52

Sutter's Mill

MARCH 25, 2021

Some of these are exercised by the “wrong order” permutations above, but even call sites that remember the right argument order can make mistakes about the actual values. But if the sight of these function signatures has had you pulling your hair and shouting “use the type system, Luke!” is_reachable? Language support. What’s the cost?

C++ 45

C++ Design Code Systems 45

Dynatrace

DECEMBER 10, 2020

I recently joined two industry veterans and Dynatrace partners, Syed Husain of Orasi and Paul Bruce of Neotys as panelists to discuss how performance engineering and test strategies have evolved as it pertains to customer experience. Dynatrace news. This blog summarizes our great conversation for the posed questions.

Strategy 180

Strategy Performance Logistics Monitoring 180

SQL Server According to Bob

JANUARY 26, 2017

Quick question about a behavior we’re seeing at a customer and in testing. And we state in the documentation the following regarding tempdb: Transparent Data Encryption and the tempdb System Database. The tempdb system database will be encrypted if any other database on the instance of SQL Server is encrypted by using TDE.

Servers 40

Servers Database Azure Cache 40

The Morning Paper

APRIL 16, 2019

Teaching rigorous distributed systems with efficient model checking Michael et al., It describes the labs environment, DSLabs , developed at the University of Washington to accompany a course in distributed systems. Enabling students to build running performant versions of all of those systems in the time available is one challenge.

Systems 43

Systems Efficiency Testing Strategy 43

Smashing Magazine

AUGUST 19, 2021

Ethics are an important part of human-computer interaction because they keep people at the heart of the design process. As UX practitioners, we know empathy is an important part of the design process. Interaction Design Foundation. How To Build An Ethical User Research Practice At Any Organization. Devin Harold.

Code 137

Code Design Education Government 137

Alex Russell

FEBRUARY 21, 2023

By mandating proof of developer enthusiasm for features, extensive test suites, and accurate specifications, the catch-up process has been put on rails for Apple. This lack of transparency is by design and provides Apple deniability while simultaneously setting low expectations, making them easier to exceed. But needs must.

Energy 79

Energy Games Engineering Design 79

The Netflix TechBlog

OCTOBER 14, 2021

The end result is the first major update to BetterTLS since its first release : a new suite of tests to exercise TLS implementations’ certificate path building. As service owners, having test suites that can answer these questions can guide decision making. specification and the final version. final specification released 2018).

Servers 165

Servers Testing Best Practices Java 165

Percona

AUGUST 30, 2023

This can be changed later using the pg_checksums utility, but that will be a painful exercise on a big database. cat /usr/lib/systemd/system/postgresql-14.service. That is where all “ALTER SYSTEM SET/RESET” commands keep the information. But another database might be an OLAP system.

Database 105

Database Servers Open Source Tuning 105

Dynatrace

APRIL 21, 2022

The Azure Well-Architected Framework is a set of guiding tenets organizations can use to evaluate architecture and implement designs that will scale over time. Design efficient use of your computing resources as demand changes and technologies evolves. Design applications to recover from errors gracefully. Reliability.

Azure 190

Azure Monitoring Virtualization Metrics 190

The Agile Manager

OCTOBER 31, 2022

It’s also awkward, an exercise of the blindfolded people describing the pachyderm. No surprise that strategic planning exercises tend to produce a lot of “what to do” options, which they present as a portfolio of strategic opportunities. Defining the opportunity through a thorough understanding what’s going on is hard. And that’s ok.

Strategy 89

Strategy Retail Operating System Programming 89

O'Reilly

OCTOBER 19, 2021

In effect, the engineer designs and builds the world wherein the software operates. The applications must be integrated to the surrounding business systems so ideas can be tested and validated in the real world in a controlled manner. Today, a number of cloud-based, auto-scaling systems are easily available, such as AWS Batch.

DevOps 138

DevOps Software Engineering Infrastructure Open Source 138

Percona

DECEMBER 5, 2023

The scenario Service considerations In this exercise, we wanted to perform a major version upgrade from PostgreSQL v12.16 This approach will empower database managers to evolve their systems with minimal interruption, leveraging the best of PITR and logical replication for smoother version upgrades. to PostgreSQL v15.4.

Database 79

Database Traffic C++ Servers 79

The Agile Manager

APRIL 28, 2008

Indeterminate counterparty risk in a highly interconnected financial system means there’s a chance capital markets could get blindsided yet again, so hedge funds are front and centre of the regulatory debate. In these cases, development is an exercise of continuous problem solving, not rote execution.

Best Practices 40

Best Practices Innovation Mobile Systems 40

Adrian Cockcroft

NOVEMBER 11, 2019

A resilient system continues to operate successfully in the presence of failures. There are many possible failure modes, and each exercises a different aspect of resilience. Hence, one way to reduce risk is to make systems more observable. This discussion focuses on hardware, software and operational failure modes.

Latency 52

Latency Engineering Systems Hardware 52

Adrian Cockcroft

NOVEMBER 11, 2019

A resilient system continues to operate successfully in the presence of failures. There are many possible failure modes, and each exercises a different aspect of resilience. Hence, one way to reduce risk is to make systems more observable. This discussion focuses on hardware, software and operational failure modes.

Latency 53

Latency Engineering Systems Hardware 53

Tasktop

OCTOBER 30, 2019

Over the past months, a number of Fortune 100 customers have been testing Tasktop’s new product, Tasktop Viz , to implement the Flow Framework. Compliance by design is a cool concept, makes life easier for developers. We identified 671 duplicate items between systems, saving 4,750 hours of unnecessary work. Day two recap.

DevOps 8

DevOps Education Innovation Metrics 8

The Morning Paper

JULY 4, 2019

Are you ready to take your system assurance programme to the next level? The ‘controlled’ part is important here because given the scale and complexity of the environment under test, the only meaningful place to do this is in production with real users. a bug fix, configuration change, new feature, or A/B test).

Latency 77

Latency Engineering Metrics Traffic 77

HammerDB

JULY 16, 2021

When a system ‘scales’ it is able to deliver higher levels of performance proportional to the system resources available to it. In particular, this means as we add CPU cores and increase the system load, we see higher performance. Vuser 1:Timing test period of 5 in minutes Vuser 1:1., and MySQL 8.0.25

Virtualization 57

Virtualization Performance C++ Database 57

Percona

JULY 6, 2023

Performance is one of the essential aspects of a database management system. then true else false end FROM generate_series(1, 10000000); Now we have our test table with some dummy data so we can practice. then true else false end FROM generate_series(1, 10000000); Now we have our test table with some dummy data so we can practice.

Best Practices 92

Best Practices Tuning Database Testing 92

The Morning Paper

JANUARY 23, 2020

The process tracing exercise included: Examning IRC transcripts from multiple channels. Peer consensus was the primary mechanism used to decide whether to take actions affecting the production systems, and on two occassions changes were pushed through without waiting for automated tests to complete. " – wikipedia.

Internet 53

Internet Internet Cache Engineering 53

Smashing Magazine

NOVEMBER 11, 2021

From Good To Great In Dashboard Design: Research, Decluttering And Data Viz. From Good To Great In Dashboard Design: Research, Decluttering And Data Viz. Tossing out suboptimal parts of our design can be a daunting task, especially after you’ve invested hours of work into it. Mediocre vs Great Dashboard Design.

Design 93

Design Best Practices Efficiency Testing 93

Strategic Tech

FEBRUARY 16, 2022

The system needs to be highly reliable because even just a little downtime can alienate loyal customers. Two particularly relevant patterns are Efficiency Enables Evolution and Higher Order Systems Create New Sources of Worth. In Wardley lingo, Google Maps is so efficient that it acts as a building block for higher-order systems (e.g.

Innovation 52

Innovation Speed Google Strategy 52

Alex Russell

AUGUST 30, 2021

Does Apple restrict, in any way, the ability of competing web browsers to deploy their own web browsing engines when running on Apple's operating system? Developers can provide feedback from using features and lobby other browsers to adopt (or re-design) them. House Antitrust Subcommittee includes their most specific claims: 4.

Engineering 98

Engineering Open Source Website Operating System 98