The Netflix TechBlog

DECEMBER 3, 2019

by David Berg , Ravi Kiran Chirravuri , Romain Cledat , Savin Goyal , Ferras Hamad , Ville Tuulos tl;dr Metaflow is now open-source! The infrastructure should allow them to exercise their freedom as data scientists but it should provide enough guardrails and scaffolding, so they don’t have to worry about software architecture too much.

Open Source 232

Open Source AWS Infrastructure Energy 232

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. We will not concern ourselves with the raw throughput of workload.

Performance 54

Performance Benchmarking Cache Storage 54

Dynatrace

MAY 28, 2020

You may have seen over the past few months we have been extensively promoting Service Level Indicators (SLIs) and Service Level Objectives (SLOs) as part of our Open Source project Keptn. The app description and supporting files such as load testing scripts are on the Keptn Example GitHub. This is what this blog is all about.

Engineering 187

Engineering Performance Metrics Best Practices 187

The Netflix TechBlog

DECEMBER 3, 2019

by David Berg , Ravi Kiran Chirravuri , Romain Cledat , Savin Goyal , Ferras Hamad , Ville Tuulos tl;dr Metaflow is now open-source! The infrastructure should allow them to exercise their freedom as data scientists but it should provide enough guardrails and scaffolding, so they don’t have to worry about software architecture too much.

Open Source 134

Open Source AWS Infrastructure Energy 134

Percona

DECEMBER 5, 2023

The scenario Service considerations In this exercise, we wanted to perform a major version upgrade from PostgreSQL v12.16 Percona Distribution for PostgreSQL provides the best and most critical enterprise components from the open-source community, in a single distribution, designed and tested to work together.

Database 76

Database Traffic C++ Servers 76

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. Here is an example of the function definition to test the function-level settings. This is the level at which decisions on whether to use data_checksums need to be taken.

Database 102

Database Servers Open Source Tuning 102

Percona

JULY 6, 2023

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. Next is the table definition.

Best Practices 89

Best Practices Tuning Database Testing 89

MachMetrics

JANUARY 4, 2019

PageSpeed is an open source project. If you aren’t familiar with open source, it doesn’t exactly mean what you might think. Work with a test box first before actually implementing the module into your server architecture. Good website performance is part of that equation.

Speed 60

Speed Website Open Source Google 60

Alex Russell

AUGUST 30, 2021

WebKit is an open-source web engine that allows Apple to enable improvements contributed by third parties. Apple's Open Source Claim #. The open source nature of WebKit is indisputable as a legal technicality. It's worth assessing these claims from most easily falsified to most contested.

Engineering 98

Engineering Open Source Website Operating System 98

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. Ultimately, this comes down to testing. Even if you don't know there will be a problem, test anyway, early in your development cycle.

Wireless 52

Wireless DevOps Infrastructure Network 52

Sutter's Mill

JUNE 3, 2021

its results if call sites call it in a way that violates the precondition the assertion is testing. The requirements that are reasonably checkable should be written as code so that the caller can perform the checks when testing their code. Violating the assertion does not result in undefined behavior directly.

C++ 54

C++ Programming Lambda Code 54

Adrian Cockcroft

NOVEMBER 11, 2019

There are many possible failure modes, and each exercises a different aspect of resilience. In the same way that we have moved from a few big software releases a year to continuous delivery of many small changes, we need to move from annual disaster recover tests or suffering when things actually break, to continuously tested resilience.

Latency 52

Latency Engineering Systems Hardware 52

Adrian Cockcroft

NOVEMBER 11, 2019

There are many possible failure modes, and each exercises a different aspect of resilience. In the same way that we have moved from a few big software releases a year to continuous delivery of many small changes, we need to move from annual disaster recover tests or suffering when things actually break, to continuously tested resilience.

Latency 53

Latency Engineering Systems Hardware 53

HammerDB

JANUARY 5, 2019

Note that the main developer of HammerDB is Intel employee (#IAMINTEL) however HammerDB is a personal open source project and any opinions are specific to the context of HammerDB as an independent personal project and are not related to Intel in any way. When testing your application however this is a very real consideration.

Benchmarking 40

Benchmarking Database Social Media Scalability 40

The Morning Paper

APRIL 16, 2019

Testing and grading their solutions is another! Although we added tests to catch specific issues as we learned of them, we found it difficult to keep up with the diversity of possible student errors. Testing and model checking. It’s hard to exhaustively test a distributed system with traditional testing techniques.

Systems 43

Systems Efficiency Testing Strategy 43

O'Reilly Software

MARCH 7, 2018

This is mixing concerns and leads to code that becomes strongly coupled, monolithic, hard to write, hard to read, hard to evolve, hard to test, and hard to reuse. Over the years, these patterns have been implemented by numerous products, ranging from commercial ESBs and enterprise message buses to open source libraries and products.

Transportation 72

Transportation Java Programming Architecture 72

Brendan Gregg

NOVEMBER 13, 2017

There's also the "[No A **e Rule]", popularized by a bestselling book of this title, which provides the following [test]: 1. Here's a test for you or your company: Would you tolerate a brilliant engineer who is also an a **e? Alice is great at fixing hard bugs, writing test suites, doing code merges, and other unglamorous work.

Engineering 111

Engineering Energy Technology Technology 111

O'Reilly

JANUARY 17, 2023

You might say that the outcome of this exercise is a performant predictive model. Second, this exercise in model-building was … rather tedious? If you’re a professional data scientist, you already have the knowledge and skills to test these models. That’s sort of true. Get your results in a few hours.

Tuning 130

Tuning Open Source AWS Software 130

O'Reilly

OCTOBER 19, 2021

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. but to reference concrete tooling used today in order to ground what could otherwise be a somewhat abstract exercise. An Overarching Concern: Correctness and Testing.

DevOps 138

DevOps Software Engineering Infrastructure Open Source 138

The Netflix TechBlog

FEBRUARY 10, 2021

Depending on which solution you choose, you could be inheriting a ton of issues or something that is battle tested. Even today, as the Hawkins team, we run through all of the above exercises and more to ensure that the design system is robust and has the level of support the engineering organization can trust.

Design 230

Design Systems Engineering Entertainment 230