Edge Perspectives
AUGUST 5, 2019
Scalable learning will be the key to institutional success as we move deeper into an exponentially changing world. But to really scale learning, we’re going to need to adopt a very different approach to strategy – the “zoom out, zoom in” approach. This post will explore why these two approaches are so tightly connected. Scalable learning
Scalegrid
AUGUST 30, 2019
Redis , short for Remote Dictionary Server, is a BSD-licensed, open-source in-memory key-value data structure store written in C language by Salvatore Sanfillipo and was first released on May 10, 2009. Depending on how it is configured, Redis can act like a database, a cache or a message broker. It’s important to note that Redis is a NoSQL database system.
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Abstracta
AUGUST 9, 2019
With all of the free and enterprise tools available for performance testing, there’s no excuse for having a system failure Performance tests reveal how a system behaves and responds during various situations. A system may run very well with only 1,000 concurrent users, but how. The post 14 Best Performance Testing Tools & APM Solutions appeared first on Abstracta Software Testing Services.
CSS Wizardry
AUGUST 7, 2019
I’m working on a client project at the moment and, as they’re an ecommerce site, there are a lot of facets of performance I’m keen to look into for them: load times are a good start, start render is key for customers who want to see information quickly (hint: that’s all of them), and client-specific metrics like how quickly did the key product image load?
Alex Podelko
AUGUST 18, 2019
Following up my post Are Times still Good for Load Testing? , I decided to answer multiple comments here separately. First, I’d like to elaborate on “It may be less need for simple load testing due to increased scale and sophistication of systems” I meant that the traditional way – testing the system before deploying in production using production-type workload – is not the only way anymore.
Dynatrace
AUGUST 14, 2019
Dynatrace news. At Dynatrace, we’re constantly striving to come up with solutions that can help modernize your performance and user experience monitoring strategies. Session Replay is one such feature, allowing you to capture and visually replay your users’ experiences with your application, just like you’re watching a movie. Session Replay can significantly improve the way your team performs tasks such as: Resolving customer complaints by watching visual replays so that you know exactly w
DZone
AUGUST 28, 2019
Introduction. These days, our code frequently has to reach out to a remote server as part of its job, usually consuming an API or some other service. Frequently, our code communicates with these remote services in a RESTful manner.
Technology Performance Pulse brings together the best content for technology performance professionals from the widest variety of industry thought leaders.
The Netflix TechBlog
AUGUST 22, 2019
Baking Windows with Packer By Justin Phelps and Manuel Correa Customizing Windows images at Netflix was a manual, error-prone, and time consuming process. In this blog post, we describe how we improved the methodology, which technologies we leveraged, and how this has improved service deployment and consistency. Artisan Crafted Images In the Netflix full cycle DevOps culture the team responsible for building a service is also responsible for deploying, testing, infrastructure, and operation of t
CSS Wizardry
AUGUST 13, 2019
Disclaimers: I was not approached or hired by Hoefler&Co or Cloud.typography to look into any of the following issues. I disclosed all of the below to Cloud.typography and gave them ample opportunity to work together to solve the issues at the root of the problem. There was no appetite from them to do so, so I decided to make it all available for free anyway—a faster web benefits everyone.
All Things Distributed
AUGUST 28, 2019
Innovation has always been part of the Amazon DNA, but about 20 years ago, we went through a radical transformation with the goal of making our iterative process—" invent, launch, reinvent, relaunch, start over, rinse, repeat, again and again "—even faster. The changes we made affected both how we built applications and how we organized our company.
Dynatrace
AUGUST 30, 2019
Dynatrace news. I was fortunate enough to get invited to our PerformGo! APAC Series. And while these events are a great opportunity for us Dynatracers to share our thoughts with our users, it’s also an amazing opportunity to for us to learn from our users about how they use Dynatrace to optimize digital experiences and digital operations in both the public and private sector.
DZone
AUGUST 6, 2019
The popularity of microservices and the use of third-party services for non-business critical features have drastically increased the number of integrations that make up the modern application. These days, it is commonplace to use MyS QL, Redis as a key-value store, MongoDB, Postgress, and InfluxDB — and that is all just for the database — let alone the multiple services that make up other parts of the application.
Uber Engineering
AUGUST 22, 2019
As Uber Freight marked its second anniversary, we went back to the drawing board to redesign its app. The original carrier app was successful for owner-operators with one or two drivers, but it wasn’t optimized for larger fleets—feedback we … The post Building the New Uber Freight App as Lists of Modular, Reusable Components appeared first on Uber Engineering Blog.
SQL Performance
AUGUST 14, 2019
This article is the fourth installment in a series about T-SQL bugs, pitfalls and best practices. Previously I covered determinism , subqueries and joins. The focus of this month's article is bugs, pitfalls and best practices related to window functions. Thanks Erland Sommarskog, Aaron Bertrand, Alejandro Mesa, Umachandar Jayachandran (UC), Fabiano Neves Amorim, Milos Radivojevic, Simon Sabin, Adam Machanic, Thomas Grohser, Chan Ming Man and Paul White for offering your ideas!
CSS Wizardry
AUGUST 15, 2019
I’m working with a client at the moment who, unfortunately, has a blocking third party stylesheet that’s needed to successfully render one of their site’s key pages. Until we can design a more long-term solution (and that’s assuming we can at all) that can asynchronously load the file, I wanted to work out a way to minimise its impact. This is a regular that is, necessarily, defined in the.
Kovair
AUGUST 18, 2019
The increasing demand for IT companies to deliver high-quality software at a rapid speed has made it compulsory to shift towards using Agile and DevOps. The post The Human Value in Driving Automated DevOps Testing appeared first on Kovair Blog.
Dynatrace
AUGUST 28, 2019
Dynatrace news. In software, observability refers to telemetry produced by services. Observability is divided into three major verticals—metrics, logs, and distributed traces—the so-called three pillars of observability. Thanks to projects such as OpenTelemetry , which promotes the standardization of data collection, and W3C trace-context , built-in telemetry will soon become a must-have feature of cloud-native software.
DZone
AUGUST 20, 2019
1. Overview. In this post, we'll have a look at how to write tests unit and integration in a Spring Boot environment. You can find tons of tutorials online on this topic but it is very difficult to find all the information that you need in just one page. I often noticed that junior developers are confusing between unit and integration test; especially when speaking about spring ecosystem and I'll try to clarify the usage of different annotations used in different contexts. 2.
Smashing Magazine
AUGUST 23, 2019
Faster Image Loading With Embedded Image Previews. Faster Image Loading With Embedded Image Previews. Christoph Erdmann. 2019-08-23T13:30:59+02:00. 2019-08-23T13:06:42+00:00. Low Quality Image Preview (LQIP) and the SVG-based variant SQIP are the two predominant techniques for lazy image loading. What both have in common is that you first generate a low-quality preview image.
The Polyglot Developer
AUGUST 5, 2019
When it comes to modern application development, whether that be web, mobile, or other, there is almost always a need interact with remote web services, generally through HTTP. When working with frameworks such as Angular, Vue, and React, there is baked in functionality for making requests, but what about if you’re using vanilla JavaScript or you’d prefer not to use those built in functionalities?
SQL Performance
AUGUST 2, 2019
I have been making the same recommendations about tempdb since I started working with SQL Server over 15 years ago, when I was working with customers running version 2000. The gist of it: create multiple data files that are sized the same, with the same auto-growth settings, enable trace flag 1118 (and maybe 1117), and reduce your tempdb use. From the customer side, this has been the limit of what can be done*, until SQL Server 2019.
Uber Engineering
AUGUST 14, 2019
Maintaining Uber’s large-scale data warehouse comes with an operational cost in terms of ETL functions and storage. In our experience, optimizing for operational efficiency requires answering one key question: for which tables does the maintenance cost supersede utility? Once identified, … The post Less is More: Engineering Data Warehouse Efficiency with Minimalist Design appeared first on Uber Engineering Blog.
Dynatrace
AUGUST 27, 2019
Dynatrace news. Welcome back to the blog series in which we share how you can easily solve three common problem scenarios by using Dynatrace and xMatters Flow Designer. In Part 1 we explored how DevOps teams can prevent a process crash from taking down services across an organization in five easy steps. In this post, we’ll look at how you can set up an automated response to full disk errors and thereby prevent your services from going down.
DZone
AUGUST 15, 2019
With All of the Free and Enterprise Tools Available for Performance Testing, There’s No Excuse for Having a System Failure. Performance tests reveal how a system behaves and responds during various situations. A system may run very well with only 1,000 concurrent users, but how would it run with 100,000? In terms of performance, we wish to achieve three main goals: speed, scalability, and stability.
Tim Kadlec
AUGUST 29, 2019
Yesterday someone at Shopify let me know on Twitter that they started reducing page weight if the Save-Data header is on. @tkadlec [link] is now Save-Data aware. About a 13% reduction in page weight, [link]. Early data shows 20% of Indian/Brazilian requests contain this header so happy days #webperf ??. I love seeing companies paying attention to the Save-Data header.
Smashing Magazine
AUGUST 8, 2019
Inspired Design Decisions: Ernest Journal. Inspired Design Decisions: Ernest Journal. Andrew Clarke. 2019-08-08T13:00:59+02:00. 2019-08-08T12:09:06+00:00. When you work in design for any length of time, forming habits is natural. It’s not unusual to follow a predictable process or use familiar patterns. This repetition can be fabulous for your productivity, but when each design looks much like your last, you can quickly begin to feel jaded.
SQL Shack
AUGUST 16, 2019
A graph database is a type of NoSQL database that is based on graph theory. Graph databases are ideal for storing data that has complex many to many relationships. In this article, we will study the very basics of graph databases with the help of a simple example. Characteristics of a Graph Database A graph […].
The Polyglot Developer
AUGUST 12, 2019
The thirtieth episode of The Polyglot Developer Podcast is now available on the popular podcast networks! This episode is titled, Building a Developer Community with Meetups , and it features Vijay Menon , organizer of the JavaScriptLA Meetup group in Los Angeles, California. Being a part of a developer community, outside of a day job, is important for all developers.
Dynatrace
AUGUST 16, 2019
Dynatrace news. As microservices and automation continue to drive API usage, most organizations have either already introduced, or plan to introduce, an API testing process. With Dynatrace Synthetic you can easily create API tests with synthetic monitors. Now we’re making it easier for you to test APIs that are secured by OAuth 2.0! What is OAuth?
DZone
AUGUST 1, 2019
According to a report, app crashes cause 71% of uninstalls. Other reasons that compel users to uninstall the app are page response time, confusing UI, battery consumption, etc. This indicates the importance of functional testing as well as non-functional testing to deliver a user-friendly app. So let’s understand what is functional testing. What is Functional Testing?
Uber Engineering
AUGUST 7, 2019
A common axiom among Uber engineers states that building new features is like fixing a car’s engine while driving it. As we scaled up to our present level of support for 14 million trips per day, the car in that … The post Migrating Functionality Between Large-scale Production Systems Seamlessly appeared first on Uber Engineering Blog.
The Morning Paper
AUGUST 25, 2019
Snuba: automating weak supervision to label training data Varma & Ré, VLDB 2019. This week we’re moving on from ICML to start looking at some of the papers from VLDB 2019. VLDB is a huge conference, and once again I have a problem because my shortlist of “that looks really interesting, I’d love to read it” papers runs to 54 long at the moment!
SQL Performance
AUGUST 23, 2019
Background. In traditional row-mode execution plans, SQL Server may introduce a Bitmap operator as part of performing early semi join reduction before a parallel hash or merge join. The bitmap is constructed from the build input, and used to filter rows on the probe input before they reach the join. I have written about row-mode bitmaps before and they are also covered in the documentation.
QAMentor
AUGUST 13, 2019
At QA Mentor Inc., we believe our clients deserve nothing but the best. Therefore, we thoroughly test the products our clients receive to ensure our clients are getting top notch products. Software testing is only becoming more important in today’s ever-advancing tech-driven economy and is something we are extremely proud to be able to do … The post QA Mentor Inc.
Dynatrace
AUGUST 20, 2019
Dynatrace news. With the release of Dynatrace 1.175, we’ve improved the content validation capabilities of synthetic browser and clickpath monitors. The contains text content validation option now mimics the Find (Ctrl+F/Cmd+F) functionality of a web browser. This change has the potential to cause existing synthetic browser and clickpath monitors to fail.
DZone
AUGUST 14, 2019
Organizations are in search of improving network agility, but what exactly does this mean? Network agility is represented by the volume of change in the network over a period of time and is defined as the capability for software and hardware component’s to automatically configure and control itself in a complex networking ecosystem. The rise of innovative efforts made by several vendors to expand and modernize network device interfaces is improving network agility and is seen with emerging techn
KeyCDN
AUGUST 8, 2019
Responsive image techniques, such as the srcset , sizes , and media HTML attributes, allow different scaled images to be delivered based on the size and resolution of the accessing device. This allows you to further optimize your image delivery to improve the overall performance of your website or application. Instead of taking a single image and only making it responsive with CSS, which is then delivered to all devices, you can deliver completely different images based on the requesting device.
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