The Netflix TechBlog

DECEMBER 23, 2020

By Fabio Kung , Sargun Dhillon , Andrew Spyker , Kyle , Rob Gulewich, Nabil Schear , Andrew Leung , Daniel Muino, and Manas Alekar As previously discussed on the Netflix Tech Blog, Titus is the Netflix container orchestration system. It runs a wide variety of workloads from various parts of the company?—?everything

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Media Metrics Systems Processing 297

The Netflix TechBlog

SEPTEMBER 8, 2020

On the Android team, while most of our time is spent working on the app, we are also responsible for maintaining this backend that our app communicates with, and its orchestration code. Image taken from a previously published blog post As you can see, our code was just a part (#2 in the diagram) of this monolithic service.

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Latency Cache Java Traffic 243

Smashing Magazine

SEPTEMBER 2, 2021

Over the last little while, I’ve been able to collect links to several interactive coding tools and apps that can help you supplement your skills in different areas of web development. This is a straightforward flexbox playground that also generates the code for you. On design systems, CSS/JS and UX. “code golf”).

Development 145

Development Games Education Programming 145

The Morning Paper

MARCH 15, 2020

Understanding, detecting and localizing partial failures in large system software , Lou et al., Partial failures ( gray failures ) occur when some but not all of the functionalities of a system are broken. Here are the key findings: Partial failures appear throughout the release history of each system, 54% within the last three years.

Systems 98

Systems Software Software Programming 98

Dynatrace

JUNE 1, 2023

More than half of CIOs confirmed that they often make tradeoffs among code quality, security, and reliability to meet the need for rapid software delivery. It represents the percentage of time a system or service is expected to be accessible and functioning correctly. But the pressure on CIOs to innovate faster comes at a cost.

Latency 189

Latency Website Traffic Virtualization 189

Dynatrace

DECEMBER 10, 2020

During the recent pandemic, organizations that lack processes and systems to scale and adapt to remote workforces and increased online shopping are feeling the pressure even more. Company brands are now measured by the “app” and “app experience” and expect every application to be as fast as Google.

Strategy 190

Strategy Performance Logistics Monitoring 190

Dynatrace

JUNE 1, 2023

More than half of CIOs confirmed that they often make tradeoffs among code quality, security, and reliability to meet the need for rapid software delivery. It represents the percentage of time a system or service is expected to be accessible and functioning correctly. But the pressure on CIOs to innovate faster comes at a cost.

Traffic 173

Traffic Website Latency Virtualization 173

The Netflix TechBlog

SEPTEMBER 10, 2024

Sample system diagram for an Alexa voice command. Where aws ends and the internet begins is an exercise left to the reader. The other main use case was RENO, the Rapid Event Notification System mentioned above. Dynomite had great performance, but it required manual scaling as the system grew.

Latency 233

Latency Cache Tuning Efficiency 233

Dynatrace

APRIL 21, 2022

Using high-fidelity metrics, logs, code-level tracing, and a dynamic topology map of your applications, Davis can identify the precise root cause and prioritize its business impact. To optimize your back-end systems, you can use the service flow view within Dynatrace to identify layers of application architecture. Reliability.

Azure 201

Azure Monitoring Virtualization Metrics 201

Dynatrace

APRIL 5, 2024

In other words, where the application code resides. However, it’s essential to exercise caution: Limit the quantity of SLOs while ensuring they are well-defined and aligned with business and functional objectives. That said, the guiding thread, predominantly under the client’s control, remains the backend perspective.

Efficiency 237

Efficiency Traffic Tuning Metrics 237

The Morning Paper

SEPTEMBER 24, 2019

50 ways to leak your data: an exploration of apps’ circumvention of the Android permissions system Reardon et al., Side-channels are typically an unintentional consequence of a complicated system. The OpenX SDK was found to be using the ARP cache side channel, and the code makes it clear the authors knew what they were doing.

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Systems Traffic Network Google 74

Smashing Magazine

OCTOBER 13, 2021

You can always ask a question live , you can share your screen and get immediate feedback, and you can work on group exercises with people around the world. Live discussions and interactive exercises are at the very heart of every workshop, with group work, homework, reviews and live interaction with people around the world.

Design 89

Design Programming Testing Systems 89

The Netflix TechBlog

MAY 27, 2020

Reliability, formally speaking, is the ability of a system to function under stated conditions for a period of time. Put simply, reliability means a system should work and continue working. assisting the responding service owners with understanding what systems are contributing to the incident Liaison?—?communicating

Engineering 106

Engineering Innovation Systems Architecture 106

O'Reilly

JANUARY 17, 2023

Figuring out what kinds of problems are amenable to automation through code. So it behooves a software developer to spot what portions of human activity can be properly automated away through code, and then build that. Because if companies use code to automate business rules, they use ML/AI to automate decisions.

Tuning 132

Tuning Open Source Software Software 132

O'Reilly

OCTOBER 19, 2021

If you peek under the hood of an ML-powered application, these days you will often find a repository of Python code. Let’s start by considering the job of a non-ML software engineer: writing traditional software deals with well-defined, narrowly-scoped inputs, which the engineer can exhaustively and cleanly model in the code.

DevOps 140

DevOps Software Engineering Infrastructure Open Source 140

Smashing Magazine

AUGUST 19, 2021

It all starts with a Code of Ethics. “I Outcomes of a code of ethics affect almost every aspect of your user research practice, from processes to templates and team environment. Outcomes of a code of ethics affect almost every aspect of your user research practice, from processes to templates and team environment.

Code 139

Code Design Education Government 139

Dynatrace

JUNE 1, 2021

Practitioners use APM to ensure system availability, optimize service performance and response times, and improve user experiences. Causes can run the gamut — from coding errors to database slowdowns to hosting or network performance issues. Mobile apps, websites, and business applications are typical use cases for monitoring.

Monitoring 148

Monitoring Mobile Social Media Infrastructure 148

Testlodge

AUGUST 9, 2023

The tester established a baseline by selecting the most critical, common, or obvious path through the code selection. Steps to Performing Basis Path Testing The first step is to create a control flow graph for a specified code section. The second step is to select a baseline path through the code.

Testing 75

Testing Software Software C++ 75

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 Design 43

Percona

OCTOBER 31, 2023

The process of gathering data will take some time, but we plan to periodically share statistics that we collect, like breakdowns of versions of database software being used or popular operating systems and architectures. Check our code You can check the telemetry module’s code in our GitHub repository: [link] Do you have feedback?

Open Source 96

Open Source Database Operating System Programming 96

Percona

DECEMBER 29, 2022

While working as a DBA, we perform many regular tasks, and one of them is upgrading our database systems. In this blog post, I will show you a particular example I faced when working with an upgrade exercise using pg_upgrade. When working with the upgrade exercise, the goal was to move from PostgreSQL 11 to PostgreSQL 12.

C++ 84

C++ Open Source Database Programming 84

Smashing Magazine

AUGUST 5, 2021

Or perhaps there is no mistake on our end at all, and it’s a system bug that’s absolutely out of our control. When large parts of the interface are disabled , most customers will assume that the system is busy , and some process is happening in the background on the page. Or we’ve overlooked some fine print somewhere.

Design 145

Design Transportation Code Systems 145

Percona

AUGUST 8, 2023

As such, one of the more common questions I get from my clients is whether or not their system will be able to endure an anticipated load increase. Does your traffic increase come with updated code changes that change the queries? When you saturate disk IOPS, your system is going to run slow. Do these queries use more caches?

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Traffic Cache Monitoring Database 93

Percona

AUGUST 30, 2023

If a PostgreSQL user wants to change these values, they need to recompile the PostgreSQL from the source code. 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. But another database might be an OLAP system.

Database 109

Database Servers Open Source Tuning 109

O'Reilly

JUNE 15, 2023

Governance is not a “once and done” exercise. And we should define current best practices in the management of AI systems and make them mandatory , subject to regular, consistent disclosures and auditing, much as we require public companies to regularly disclose their financials. In his book Voices in the Code , James G.

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Government Best Practices Energy Internet 100

Sutter's Mill

JANUARY 11, 2021

Assertions have been a foundational tool for writing understandable computer code since we could write computer code… far older than C’s assert() macro, they go back to at least John von Neumann and Herman Goldstine (1947) and Alan Turing (1949). Run-time errors should be reported using exceptions, error codes, or similar.

C++ 80

C++ Programming Code Testing 80

Smashing Magazine

DECEMBER 2, 2021

Advent of Code. If you prefer a puzzle over an article, take a look at Advent of Code. Code Security Advent Calendar. If you’re up for a challenge that involves spotting security vulnerabilities, then the Code Security Advent Calendar is just the right one for you. JavaAdvent on Twitter. LeanUXmas on Twitter.

Design 110

Design Development Programming Website 110

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? Anyone who cares to download and fork the code can do so. House Antitrust Subcommittee includes their most specific claims: 4. If no, please explain why not.

Engineering 112

Engineering Open Source Website Operating System 112

MachMetrics

DECEMBER 12, 2019

Google has announced plans for a new badging system that would let users know whether a website typically loads slowly. Most stemmed from Google exercising too much power with this move. By taking feedback from other users and developers, Google can implement a system that will grow in a positive manner.

Google 86

Google Website Best Practices Internet 86

Sutter's Mill

JANUARY 25, 2021

We want a way to enable checking for some assertions but not others in the same code, because we may not always be able to afford expensive checks. If you develop your own assertion system for in-house use, support enabling/disabling at least these kinds of assertions independently. [1] in production).

C++ 62

C++ Programming Cache Testing 62

O'Reilly

JUNE 27, 2023

When a person clicked “submit,” the website would pass that form data through some backend code to process it—thereby sending an e-mail, creating an order, or storing a record in a database. That code was too trusting, though. Red-team exercises can uncover weaknesses in the system while it’s still under development.

Social Media 92

Social Media Media Website Database 92

Nick Desaulniers

APRIL 18, 2014

“It’s written in ones and zeroes - binary code. A really advanced hacker comes to understand the true inner workings of the machine – he sees through the language he’s working in and glimpses the secret functioning of the binary code – becomes a Ba’al Shem of sorts.” For example in the code: 1.

C++ 98

C++ Programming Code Virtualization 98

Particular Software

MARCH 28, 2022

You can create a class that is a lousy saga but is still perfectly valid C# code. With Roslyn analyzers and code fixes , we can now do a lot better and help guide you toward the pit of success. This will save you time, as you won’t have to run your code to find out that you can’t use DateTime as a correlation property type.

Development 52

Development C++ Virtualization Metrics 52

O'Reilly

NOVEMBER 26, 2024

Nor do they have experience building and operating highly distributed systems. These precariously employed adjuncts depend on strong student performance reviews for job security, a system that incentivizes them to make few demands in exchange for high ratings.

Education 80

Education Azure AWS Java 80

The Agile Manager

OCTOBER 31, 2020

It had licensed a workflow technology and contracted a large number of people to code and configure a custom solution around it. The rules were implemented as IFTTT statements in a low-code language that did not allow them to be tested in isolation. When that happens, the exercise tends to yield no better than "less bad."

Programming 59

Programming Testing Code Technology 59

The Morning Paper

JANUARY 23, 2020

The process tracing exercise included: Examning IRC transcripts from multiple channels. Gathering timestapms of changes made to application code during the outage. A coded timelime was created dividing activities into three main types: Coordination activities. First look for any correlation to the last change made to the system.

Internet 53

Internet Internet Cache Engineering 53

Brendan Gregg

DECEMBER 21, 2019

In the video I explained how I arrived at tracing __iwl_dbg() in this way, and how you can follow a similar approach for tracing unfamiliar code. This is not my best code, since I hacked it in a hurry, but here it is: #!/usr/bin/python usr/bin/python # # iwlstrength.py iwl wifi stregth as audio # For Linux, uses BCC, eBPF.

C++ 52

C++ Education Java AWS 52