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.

Latency 233

Latency Cache Java Traffic 233

Dynatrace

APRIL 21, 2022

Figure 1 – Individual Host pages show performance metrics, problem history, event history, and related processes for each host. Right-sizing is an iterative process where you adjust the size of your resource to optimize for cost. To do that, organizations must evolve their DevOps and IT Service Management (ITSM) processes.

Azure 184

Azure Monitoring Virtualization Metrics 184

Particular Software

SEPTEMBER 11, 2023

Now go rewrite all your code… we’ll wait…are you done yet? Technically, this is all done over MSMQ where requests are processed and eventually granted or rejected, notifying other services of the outcome. Imagine if any issues arose during testing or ( shudder ) in production, and you had to pinpoint where the problem lay.

Cloud 126

Cloud Systems Azure Airlines 126

Testsigma

JANUARY 6, 2022

So, we thought of sharing some tips and tricks with the testing community that is working from home, aiming to improve their working experience overall. This is critical since even if a small detail is missed the results can be catastrophic from a testing perspective. Tracking the processes to plan better.

Testing 52

Testing Internet Internet Testing Tools 52

Particular Software

MARCH 28, 2022

With a saga, a business process that would otherwise have been implemented as a clunky batch job 1 can be built in a much more elegant and real-time manner. You can create a class that is a lousy saga but is still perfectly valid C# code. Others will save you time by doing some of the coding for you. In NServiceBus version 7.7,

Development 52

Development C++ Virtualization Metrics 52

SQL Performance

APRIL 14, 2021

I’ll do my testing in tempdb, enabling I/O and time statistics: SET NOCOUNT ON ; USE tempdb ; SET STATISTICS TIME , IO ON ; Limitations of earlier ideas. Evaluating earlier solutions, one of the important factors in getting good performance was the ability to employ batch processing. This article is dedicated to Paul’s solution.

C++ 112

C++ Servers Testing Code 112

O'Reilly

JUNE 13, 2023

It also generated a short program that implemented the widely used Miller-Rabin primality test. After fixing some obvious errors, I ran the program–and while it told me (correctly) that my number was non-prime, when compared to a known good implementation of Miller-Rabin, ChatGPT’s code made many mistakes.

Google 83

Google Programming Database Testing 83

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. Here is an example of the function definition to test the function-level settings.

Database 105

Database Servers Open Source Tuning 105

The Morning Paper

MARCH 15, 2020

In contrast, a process suffering a total failure can be quickly identified, restarted, or repaired by existing mechanisms, thus limiting the failure impact. 71% of failures are triggered by a specific environment condition, input, or faults in other processes. In 13% of cases a module became a zombie with undefined failure semantics.

Systems 98

Systems Software Software Programming 98

ScaleOut Software

AUGUST 20, 2020

Simplifying the Development Process with Mock Environments. Development is fast and straightforward using standard object-oriented techniques, and the test/debug cycle is kept short by making use of a mock environment running on the developer’s workstation. Debugging with a Mock Environment.

Cloud 52

Cloud Development Analytics Azure 52

ScaleOut Software

AUGUST 20, 2020

Simplifying the Development Process with Mock Environments. Development is fast and straightforward using standard object-oriented techniques, and the test/debug cycle is kept short by making use of a mock environment running on the developer’s workstation. Debugging with a Mock Environment.

Cloud 52

Cloud Development Analytics Azure 52

The Netflix TechBlog

MAY 27, 2020

From failure injection testing to regularly exercising our region evacuation abilities, Netflix engineers invest a lot in ensuring the services that comprise Netflix are robust and reliable. This process includes a write-up of what happened, what mitigations took place, and what follow-up work was discussed.

Engineering 104

Engineering Innovation Systems Architecture 104

The Agile Manager

OCTOBER 31, 2020

Some years ago, I was working with a company automating its customer contract renewal process. It had licensed a workflow technology and contracted a large number of people to code and configure a custom solution around it. An vendor had sold the company on QA capacity at a volume of 7 test scripts executed per person per day.

Programming 59

Programming Testing Code Technology 59

Testsigma

MARCH 6, 2020

Regression testing comprises re-running the test cases of already stable features and finding out if the new code changes attributed to the new release led to any negative impacts on the existing functionalities. When is Regression Testing done? Read here to know how to implement different types of regression testing.

Best Practices 52

Best Practices Testing Code Testing Tools 52

SQL Performance

JANUARY 12, 2022

Despite the poor performance, working on the solution is an interesting exercise. Use the following code to create the table and populate it with a small set of sample data: DROP TABLE IF EXISTS dbo. ( ID INT NOT NULL IDENTITY ( 1 , 1 ) CONSTRAINT pk_Auctions PRIMARY KEY CLUSTERED , Code CHAR ( 1 ) NOT NULL.

Code 116

Code Servers Performance Azure 116

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

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. Create and adapt the mechanical processes and social systems through which the team gets things done.

Metrics 52

Metrics Design Engineering C++ 52

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. Why not take the extra time to test for problems? That’s because it is.

Social Media 89

Social Media Media Website Database 89

The Morning Paper

JANUARY 23, 2020

A technique called process tracing was employed to try and recover "a record of participant data acquisition, situation assessment, knowledge activation, expectations, intentions, and actions as the case unfolds over time." The process tracing exercise included: Examning IRC transcripts from multiple channels.

Internet 53

Internet Internet Cache Engineering 53

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

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. When finally we had all the processes migrated, we celebrated as we decommissioned Public102. Ultimately, this comes down to testing.

Wireless 52

Wireless DevOps Infrastructure Network 52

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. Several things stand out about these initiatives.

Architecture 52

Architecture Code Strategy Programming 52

MachMetrics

JANUARY 4, 2019

Basically, Google offers a foundational code package called a module that you can then remake to suit your needs. The Apache module packages are pre-built binary while the Nginx configuration module consists solely of source code that you can then build upon. All of the optimization and configuration happens on the backend.

Speed 60

Speed Website Open Source Google 60

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

Smashing Magazine

JULY 22, 2021

In my records for the entire day, I put one color code for my work hours and will have a separate diagram specifically to break up my work hours. Exercise/outdoors. In the image above, I have outlined three sample days which may or may not be from my own days. Large preview ). Completing actual work. Creating presentations. With Teams.

Games 126

Games Availability Software Software 126

Alex Russell

AUGUST 30, 2021

Anyone who cares to download and fork the code can do so. " The eventual Blink fork was precipitated by an insurmountable difficulty in doing precisely what Apple suggested to Congress: contributing code upstream to WebKit to enable new features. It's worth assessing these claims from most easily falsified to most contested.

Engineering 98

Engineering Open Source Website Operating System 98

SQL Performance

JUNE 10, 2020

This month and the next I’m going to cover the physical processing aspects of derived tables. That is, does SQL Server perform a substitution process whereby it converts the original nested code into one query that goes directly against the base tables? Well, I’m oversimplifying a bit.

C++ 109

C++ Database Servers Code 109

SQL Performance

JUNE 10, 2020

This month and the next I’m going to cover the physical processing aspects of derived tables. That is, does SQL Server perform a substitution process whereby it converts the original nested code into one query that goes directly against the base tables? Well, I’m oversimplifying a bit.

C++ 93

C++ Database Servers Code 93

O'Reilly Software

MARCH 7, 2018

Working with never-ending streams of data necessitates continuous processing of it, ensuring the system keeps up with the load patterns it is exposed to, and always provides real-time, up-to-date information. Sadly, it is very common to write logic that deeply couples the notion of IO with the processing of that IO.

Transportation 72

Transportation Java Programming Architecture 72

SQL Server According to Bob

FEBRUARY 10, 2019

512 byte response (use database context xxxxxx, default language xxxxxxx, test size xxxxx). The following is a simple query for looking at the rate of login and logouts the test is accomplishing. The following is a simple query for looking at the rate of login and logouts the test is accomplishing. TDS pre-login exchange.

Servers 40

Servers Network Database Systems 40

Dynatrace

SEPTEMBER 20, 2019

Here’s what we discussed so far: In Part 1 we explored how DevOps teams can prevent a process crash from taking down services across an organization. In doing so, they automate build processes to speed up delivery, and minimize human involvement to prevent error. Both use the same database back-end and app configuration.

Systems 26

Systems Traffic DevOps Database 26

Rigor

NOVEMBER 22, 2019

To accomplish this goal, an organization needs to build internal processes and procedures that can operationalize a performance-first culture. A performance budget forces the team to consider web performance in every decision of the design process by quantifying the consequences of those decisions. Collaborate.

Performance 45

Performance Metrics Website Speed 45

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. For example, try and recall the last time your team’s processes were audited for compliance against the company’s ethical standards. It all starts with a Code of Ethics. “I Devin Harold. Credit: Devin Harold.

Code 137

Code Design Education Government 137

The Netflix TechBlog

DECEMBER 3, 2019

We heard many stories about difficulties related to data access and basic data processing. A key observation was that most of our data scientists had nothing against writing Python code. Data scientists want to retain their freedom to use arbitrary, idiomatic Python code to express their business logic?—?like

Open Source 232

Open Source AWS Infrastructure Energy 232

SQL Server According to Bob

JANUARY 26, 2017

My goal is to resolve mysteries about SQL Server I encounter but do this without going straight the source code first. Quick question about a behavior we’re seeing at a customer and in testing. The process to enable this for a database is described in our documentation. The question went something like this….

Servers 40

Servers Database Azure Cache 40

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