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

Media 286

Media Metrics Systems Processing 286

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 137

DevOps Software Engineering Infrastructure Open Source 137

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++ 81

C++ Open Source Database Programming 81

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

DECEMBER 2, 2021

JVM Programming Advent Calendar. Advent of Code. If you prefer a puzzle over an article, take a look at Advent of Code. Created by Eric Wastl, this is an advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like.

Design 108

Design Development Programming Website 108

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. The reaction of both vendor and program office weren't much of a surprise.

Programming 59

Programming Testing Code Technology 59

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). Assertions are only about finding bugs, not doing program work.

C++ 58

C++ Programming Code Testing 58

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 99

Database Servers Open Source Tuning 99

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). Dos Reis, J. Meredith, N.

C++ 45

C++ Programming Cache Testing 45

MachMetrics

DECEMBER 12, 2019

Google has announced plans for a new badging system that would let users know whether a website typically loads slowly. While it is seen as a positive for users to be able to quickly see if the site they’re loading is slow, the ethics of such a program become a little murkier.

Google 86

Google Website Best Practices Internet 86

The Morning Paper

DECEMBER 8, 2019

At the start of November I was privileged to attend HPTS (the High Performance Transaction Systems) conference in Asilomar. On the last morning of the conference Daniel Bittman presented some of the work being done in the context of the Twizzler OS project to explore new programming models for NVM. The Twizzler programming model.

Hardware 56

Hardware Programming Media Storage 56

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 Starting with other interfaces is like writing your first Java program in [JVM bytecode].

C++ 52

C++ Education Java AWS 52

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 Starting with other interfaces is like writing your first Java program in [JVM bytecode].

C++ 52

C++ Education Java AWS 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. 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

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. Regression checks should start as soon as a new build is released for testing and should be repeated for every new code build.

Best Practices 52

Best Practices Testing Code Testing Tools 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? 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 98

Engineering Open Source Website Operating System 98

Alex Russell

SEPTEMBER 20, 2020

"Appiness" is an illusion, an arbitrary line drawn to include programs built on some platforms but not others, and all of today's OSes allow multiple platforms to expose "real apps." Circa '07, those web apps were notably slower than native code could be. " Platforms, while plural, are not equal.

Hardware 64

Hardware Mobile Programming Java 64

The Morning Paper

AUGUST 27, 2019

I am so pleased to see a database systems paper addressing the concerns of the application developer! To the developer, a strongly consistent system behaves exactly like a single-threaded system running on a single node, so reasoning about the behaviour of the system is simple 1. VLDB’19.

Programming 59

Programming Processing Database Systems 59

John McCalpin

AUGUST 1, 2018

Bandwidth, performance analysis has two recurring themes: How fast should this code (or “simple” variations on this code) run on this hardware? MPI is a commonly used standard to implement message-passing programs on computer clusters. The source code to the library may not be available.

Hardware 40

Hardware Transportation Performance Latency 40

O'Reilly Software

MARCH 7, 2018

Build a more scalable, composable, and functional architecture for interconnecting systems and applications. Software today is not typically a single program—something that is executed by an operator or user, producing a result to that person—but rather a service : something that runs for the benefit of its consumers, a provider of value.

Transportation 72

Transportation Java Programming Architecture 72

Nick Desaulniers

APRIL 18, 2014

“It’s written in ones and zeroes - binary code. At the lowest level, all computers are programmed with strings of ones and zeroes. When you program in machine language, you are controlling the computer at its brainstem, the root of its existence. For example in the code: 1. . “Is this another analogy?”

C++ 98

C++ Programming Code Virtualization 98

Randon ASCII

OCTOBER 20, 2019

Normally ninja does an excellent job of saturating the system, keeping n+2 processes running at all times so that there is little idle time. When figuring out why a system is idle the CPU Usage (Precise) table is ideal. Instead we need to focus on when the system started working again. What is System (4) doing.

Processing 60

Processing Systems Code Software 60

Tasktop

OCTOBER 4, 2019

Navy during World War II who went on to create COBOL, one of the first programming languages? We all know about the genius of Alan Turing in cracking the Enigma code, turning WWII in the Allies’ favor. Laura concurs, suggesting that companies “s et up a mentor program for the women. ” Role models.

Technology 40

Technology Technology Education Programming 40

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.

C++ 45

C++ Design Code Systems 45

John McCalpin

JANUARY 22, 2018

Introduction: In December 2017, my colleague Damon McDougall (now at AMD) asked for help in porting the fused multiply-add example code from a Colfax report ( [link] ) to the Xeon Phi x200 (Knights Landing) processors here at TACC. Instead, we found puzzle after puzzle. Instead, we found puzzle after puzzle.

Latency 40

Latency Hardware Code Testing 40

The Agile Manager

NOVEMBER 26, 2008

Program Management Offices (PMOs) are at the nexus of this. User Interface, middle tier, server side, database, specialists in things like ERP systems) or by component (e.g., Code has been written, but it may not be functional, let alone useful. The last person to commit code in support of a use case? The QA tester?

Code 40

Code Servers Engineering Programming 40