Dynatrace

SEPTEMBER 20, 2019

One of the several deployment strategies is the blue/green deployment approach: In this method, two identical production environments work in parallel. The alert comes with the full context of the issue, including errors caused, impacted systems, and level of severity. Step 3 — xMatters alerts all the relevant resources.

Systems 27

Systems Traffic DevOps Database 27

The Netflix TechBlog

OCTOBER 26, 2021

We then used simple thought exercises based on flipping coins to build intuition around false positives and related concepts such as statistical significance, p-values, and confidence intervals. In this post, we’ll do the same for false negatives and the related concept of statistical power.

Testing 213

Testing Metrics Latency Design 213

Smashing Magazine

SEPTEMBER 2, 2021

Flexbox Defense is a play on the ‘tower defense’ strategy game genre that teaches you flexbox through 12 challenges where you have to use flexbox syntax to stop incoming enemies from getting past your defenses. On design systems, CSS/JS and UX. TypeScript Exercises. Image source: TypeScript Exercises ).

Development 145

Development Games Education Programming 145

Scalegrid

APRIL 16, 2020

In this post, we compare ScaleGrid’s Bring Your Own Cloud (BYOC) plan vs. the standard Dedicated Hosting model to help you determine the best strategy for your MySQL, PostgreSQL, Redis™ and MongoDB® database deployment. The availability of a computer system is the percentage of time its services are up during a period of time.

Cloud 242

Cloud Azure AWS Database 242

The Netflix TechBlog

SEPTEMBER 8, 2020

Over the course of this post, we will talk about our approach to this migration, the strategies that we employed, and the tools we built to support this. Functional Testing Functional testing was the most straightforward of them all: a set of tests alongside each path exercised it against the old and new endpoints.

Latency 243

Latency Cache Java Traffic 243

Dynatrace

JUNE 27, 2022

However, not all user monitoring systems are created equal. For example, real-user monitoring metrics might reveal a user performance issue that you can then apply to synthetic testing to replicate the issue by exercising the same transaction across several different variables. What is real user monitoring? The bottom line?

Best Practices 186

Best Practices Monitoring Wireless Traffic 186

Dynatrace

APRIL 5, 2024

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. Conclusion An effective Service Level Objective (SLO) holds more value than numerous alerts, reducing unnecessary noise in monitoring systems.

Efficiency 237

Efficiency Traffic Tuning Metrics 237

All Things Distributed

OCTOBER 2, 2017

With these requirements in mind, and a willingness to question the status quo, a small group of distributed systems experts came together and designed a horizontally scalable distributed database that would scale out for both reads and writes to meet the long-term needs of our business. This was the genesis of the Amazon Dynamo database.

Internet 113

Internet Internet AWS Performance 113

Dynatrace

JUNE 1, 2021

Practitioners use APM to ensure system availability, optimize service performance and response times, and improve user experiences. Application performance monitoring focuses on specific metrics and measurements; application performance management is the wider discipline of developing and managing an application performance strategy.

Monitoring 148

Monitoring Mobile Social Media Infrastructure 148

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

Strategic Tech

APRIL 1, 2022

This kata is split into four sections that address different aspects of architecting software systems. The second part of the workshop explores the company’s domain landscape (business processes, user journeys, products, systems, etc) using an event storm. The third part of the worskhop focuses on strategy?—?how

Architecture 52

Architecture Software Architecture Strategy Design 52

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. Disk IOPS The amount of disk IOPS your system uses will be somewhat related to how much of your data can fit into memory. When you saturate disk IOPS, your system is going to run slow.

Traffic 93

Traffic Cache Monitoring Database 93

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

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++ 80

C++ Programming Code Testing 80

O'Reilly

JUNE 27, 2023

Because most of those have been deployed in such a way that they are only communicating with trusted internal systems. Red-team exercises can uncover weaknesses in the system while it’s still under development. As your CISO will tell you, there’s no such thing as a “100% secure” system.

Social Media 92

Social Media Media Website Database 92

Smashing Magazine

AUGUST 19, 2021

If there is strong disagreement between one or more principles that some feel should be combined while others feel should be separate, then run a dot-voting prioritization exercise. The latter is highly unethical and leads to false assumptions and even worse design and content strategy decisions. Design Prototypes.

Code 139

Code Design Education Government 139

Tech News Gather

JUNE 15, 2023

In addition, it can also inculcate resources such as articles, podcasts, and breathing exercises to help users develop coping strategies and resilience. Users can access interactive maps, trail recommendations, and educational content highlighting ecological systems, biodiversity, and conservation efforts.

Education 52

Education Virtualization Innovation Transportation 52

Alex Russell

MARCH 9, 2024

This strategy is exemplified by 1990s-era Andreesen's goal to render Windows "a poorly debugged set of device drivers" The idea is that the web is where the action is, and that the browser winning more user Jobs To Be Done follows from increasing the web platform's capability. In some sense it's a confidence-management exercise.

Benchmarking 60

Benchmarking Strategy Internet Internet 60

Percona

DECEMBER 5, 2023

The scenario Service considerations In this exercise, we wanted to perform a major version upgrade from PostgreSQL v12.16 Conclusion Logical replication combined with Point-In-Time Recovery (PITR) in PostgreSQL offers a powerful strategy for version upgrades without significant downtime. to PostgreSQL v15.4.

Database 82

Database Traffic C++ Servers 82

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

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 Systems Engineering Hardware 53

Tasktop

FEBRUARY 24, 2021

Get together once a year for a value stream mapping exercise, and you’ll emerge with a list of potential improvement hypotheses. . But from all those hotspots, identifying the system constraint , the one big, juicy bottleneck that is at this very moment is negating and undermining the benefits from your optimization efforts?

Healthcare 52

Healthcare Retail Metrics Innovation 52

Alex Russell

FEBRUARY 21, 2023

Recall that Cupertino manages the actual work of Safari engineers through Apple-internal systems (previously named "Radar" ), making public bug reports a sort of parallel track; once an issue is imported from a public bug to a private tracker, it's more likely to get developer attention. No, this was a change in strategy.

Energy 90

Energy Games Engineering Design 90

The Morning Paper

JANUARY 23, 2020

In this study, the diagnosis and resolution of an outage in a global Internet service, Etsy.com, was explored in an effort to uncover which cognitive strategies (specifically, heuristics) are used by engineers as they work to bring the service back to a stable state. First look for any correlation to the last change made to the system.

Internet 53

Internet Internet Cache Engineering 53

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 Systems Engineering Hardware 52

Percona

JULY 6, 2023

Performance is one of the essential aspects of a database management system. Very little can be more annoying and frustrating for users than poor performance, meaning long-running queries and high response times at the front end. Next is the table definition.

Best Practices 96

Best Practices Tuning Testing Database 96

The Agile Manager

NOVEMBER 25, 2007

A basic concept of wind energy systems, it is increasingly relevant in commercial building architecture: specifically, if wind velocity can be increased through building design, the potential power that a building can derive from wind energy is considerably greater. In the aggregate, power is abstract in this definition.

Government 40

Government Energy Innovation Strategy 40

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.

Code 52

Code Architecture Strategy Programming 52

The Agile Manager

FEBRUARY 28, 2017

There aren't a lot of high cards we can draw, but playing them in the right combination offers us a strategy. For example, ghost code - code that is not commented out but will conditionally never be executed - is likely to be confused for real code in a reverse-engineering exercise. Why not put them back on the payroll?

Strategy 40

Strategy Java Code Systems 40

Tasktop

FEBRUARY 24, 2021

Get together once a year for a value stream mapping exercise, and you’ll emerge with a list of potential improvement hypotheses. . But from all those hotspots, identifying the system constraint , the one big, juicy bottleneck that at this very moment is negating and undermining the benefits from your optimization efforts?

Healthcare 40

Healthcare Retail Metrics Innovation 40

O'Reilly Software

MARCH 7, 2018

Build a more scalable, composable, and functional architecture for interconnecting systems and applications. Welcome to a new world of data-driven systems. Today, data needs to be available at all times, serving its users—both humans and computer systems—across all time zones, continuously, in close to real time.

Transportation 72

Transportation Java Programming Architecture 72

Strategic Tech

DECEMBER 12, 2019

If someone from a different culture with a different naming convention cannot be served by a system, it’s not good business or publicity. Transactional & Invariant Business Rules To enforce business rules in software systems, transactional boundaries need to be identified: which business rules must succeed or fail together.

Healthcare 10

Healthcare Software Architecture Database Software 10

HammerDB

JANUARY 5, 2019

This post addresses some of the opinions around database benchmarking and gives the top 5 reasons why industry standard benchmarking is important and should be an essential foundation of your database engineering strategy.

Benchmarking 40

Benchmarking Database Social Media Scalability 40

The Morning Paper

NOVEMBER 14, 2019

With users statically assigned to buckets during this weekly partitioning exercise, it remains to assign buckets of users to datacenters, which is done in an online fashion via a Stable Segment Assignment algorithm. Our solver employs a local search algorithm using the “best single move” strategy. a chance to warm up.

Traffic 42

Traffic Internet Internet Latency 42

Tasktop

OCTOBER 30, 2019

Scott Havens, Senior Director of Engineering at Mode Operandi, highlighted the benefits of event-based systems over legacy approaches, and how software architecture should be just as beautiful as the clothes on sale. He had a strategy. We identified 671 duplicate items between systems, saving 4,750 hours of unnecessary work.

DevOps 8

DevOps Education Innovation Metrics 8

The Netflix TechBlog

MARCH 6, 2019

Mounting object storage in Netflix’s media processing platform By Barak Alon (on behalf of Netflix’s Media Cloud Engineering team) MezzFS (short for “Mezzanine File System”) is a tool we’ve developed at Netflix that mounts cloud objects as local files via FUSE. MezzFS can be configured to cache objects on the local disk. Regional caching? —?Netflix

Media 220

Media Storage Processing Cache 220