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Apache Druid: 1000+ QPS Facile pour l'Analyse

des Données

Apache Druid offre une puissance de 1000+ QPS pour l’analyse des données, ce qui rend plus facile et plus rapide que jamais la prise de décision basée sur des données.

Les cas d’utilisation des analytics évoluent avec une augmentation du volume et des requêtes à faible latence. Mais l’échelle des analytics pour les requêtes à haut QPS nécessite une certaine considération. Si vos requêtes récupèrent des lignes simples dans des tables avec peu de colonnes ou de lignes ou agrègent une petite quantité de données, alors virtuellement n’importe quelle base de données peut répondre à vos exigences QPS.

Mais les choses deviennent difficiles si vous avez une application d’analytique (ou prévoyez en construire une) qui exécute beaucoup d’agrégations et de filtres sur des données à haute dimension et à haute cardinalité à grande échelle. Le genre d’application où beaucoup d’utilisateurs devraient pouvoir poser n’importe quelle question et obtenir leurs réponses instantanément sans contraintes sur le type de requêtes ou la forme des données.

Testing is a key factor in scaling analytics for high QPS. It’s important to understand the performance of your analytics application under different scenarios. This will help you identify bottlenecks and optimize your queries for better performance.

Les cas d’utilisation d’analytique évoluent avec des requêtes à haut volume et à faible latence. Mais le passage à l’échelle des analyses pour des requêtes élevées par seconde (QPS) nécessite une certaine prise en compte. Si vos requêtes récupèrent des lignes simples dans des tables avec peu de colonnes ou de lignes ou agrègent une petite quantité de données, alors pratiquement n’importe quelle base de données peut répondre à vos exigences QPS.

Mais les choses deviennent difficiles si vous avez une application d’analytique (ou prévoyez d’en construire une) qui exécute de nombreuses agrégations et filtres sur des données à haute dimension et à haute cardinalité à l’échelle. Le genre d’application où de nombreux utilisateurs devraient pouvoir poser n’importe quelle question et obtenir leurs réponses instantanément sans contraintes sur le type de requêtes ou la forme des données.

Le test est un facteur clé pour passer à l’échelle des analyses pour des QPS élevés. Il est important de comprendre les performances de votre application d’analytique dans différents scénarios. Cela vous aidera à identifier les goulots d’étranglement et à optimiser vos requêtes pour une meilleure performance.

Source de l’article sur DZONE

Jakarta EE is a unanimously adopted and probably the most popular Java enterprise-grade software development framework. With the industry-wide adoption of microservices-based architectures, its popularity is skyrocketing and during these last years, it has become the preferred framework for professional software enterprise applications and services development in Java.

Jakarta EE applications used to traditionally be deployed in run-times or application servers like Wildfly, GlassFish, Payara, JBoss EAP, WebLogic, WebSphere, and others, which might have been criticized for their apparent heaviness and expansive costs. With the advent and the ubiquitousness of the cloud, these constraints are going to become less restrictive, especially thanks to the serverless technology, which provides increased flexibility, for standard low costs.

Source de l’article sur DZONE


Motivation

Once I completed my first two articles, I realized there are a lot of possibilities exposed by proxying MongoDB collections through FerretDB backed by CockroachDB. CockroachDB has unique data domiciling capabilities available through multi-region abstractions, inverted and partial indexes, computed columns and of course strong consistency. Today, we’re going to discuss unique constraints in MongoDB and CockroachDB.

High-level Steps

  • Start a 9-node multi-region cluster (CockroachDB Dedicated)
  • Start FerretDB (Docker)
  • Unique Indexes
  • Considerations
  • Conclusion

Step-by-step Instructions

Start a 9-Node Multi-region Cluster (Cockroachdb Dedicated)

I am going to use the same CockroachDB Dedicated cluster from the previous article. Please refer to the previous article for the detailed steps. You can get a 30-day trial of CockroachDB Dedicated following this link.

Source de l’article sur DZONE

For developers working with low-resource environments that nevertheless wish to harness the full advantages of Kubernetes, the open-source Red Hat MicroShift project and Shipa (an application-as-code platform you can spin up for free) offer a rather compelling pairing. In this article, I’ll take you through the steps of using MicroShift to set up a lightweight Kubernetes distribution, and then manage the same cluster using the “free forever” version of Shipa Cloud. 

But first, why MicroShift? A research project started by Red Hat, MicroShift is built for running Kubernetes clusters in environments with tight resource constraints, such as edge and IoT devices. It’s a memory-optimized lightweight flavor of OpenShift/Kubernetes, and currently supports Fedora, RHEL, and CentOS Linux distributions. Shipa fits in here by helping solve some of the usual problems faced by developers and platform operators. It lets developers focus on what they’re good at and want to do (building applications) and reduces the time platform operators spend on deployments and governance. Onboarding MicroShift to Shipa offers some nice benefits by making it possible to manage multiple clusters from an administration and operations perspective. 

Source de l’article sur DZONE

As cloud computing continues exponential growth and adoption, numerous deployment strategies and models have emerged to meet the increasing demand and diverse needs of cloud users. PaaS (platform as a service) is a cloud computing model that allows you to develop, run, deploy, and launch applications and services over the internet without the constraints, complexity, and cost of building and managing the underlying cloud infrastructure—including storage, operating systems, servers, networks, and more.

PaaS provides the fundamental benefits of cloud computing—from turnkey provisioning and disaster recovery to on-demand scalability and transparent pricing—all consistently managed. And, PaaS vendors provide developers with the tools and infrastructure to run needed programming languages and technology stacks.

Source de l’article sur DZONE

The end of the year tends to be busy for a variety of reasons and it can limit some of the freshness we see in designs during much of the year. Regardless, there are a few trending design elements.

What we are seeing right now is rooted in deep simplicity with a focus on the message.

Here’s what’s trending in design this month…

Activism and Engagement

Websites with a focus on societal issues have moved to the forefront. While the look and design techniques used for these websites can vary greatly, there’s a common theme of activism, community engagement, and support.

What’s great about this movement – and what it reflects – is that people can take to the digital space to help amplify their message or find support with people who are going through the same things they are.

While some of these efforts are backed by people and brands you may know, that’s not always the case.

The designs also work best when they reflect the personality of the spokesperson or mood of the issue at hand. Note the vast differences in the three examples.

The I Weigh Community uses bright color with a black and white image of promoter and celebrity Jameela Jamil to bring attention to mental health issues.

Wear the Waste by retailer H&M uses simple typography in a natural environment to set the stage for more eco-friendly clothing options.

Wavering Stripes uses an illustrative approach to bring attention to the stories of immigrants in detention.

Each design is vastly different but all are striking and draw attention to the causes therein. The common thread is that each design is simple enough to draw you in and help you better understand the message and not get lost in tricks or design effects.

 

 

 

In Your Face Products

’Tis the season for product promotion.

Designers are opting for larger-than-life product images that allow shoppers to see every detail before making a purchase. (Seems like a good plan in a socially-distanced pandemic world.)

It can work in a number of ways:

  • With an oversized image and ability to use on-screen controls to take a closer look;
  • With video and animation effects to see the product in action;
  • With super high-resolution and zoomed in photography.

Pair these visuals with strong descriptive language and you’ve got a winning combination.

The variance in the examples is a good showcase of how to do this well, while not over-doing effects.

The Fitbit Charge 4 website uses an opening image of the device that’s way larger in scale than reality (especially if you are on a large desktop screen). Users control using click and scroll to get more views and details of the device. Zoom and animation aren’t overwhelming, providing a solid look at the product.

The Nest Thermostat opens with a video animation of the device moving into the forefront of the screen. (It’s rather quick.) From there, if you want more detail, there’s a video to watch that provides deeper product information in a digestible manner.

The final example isn’t really a product at all, but rather an art installation. What’s interesting is that it uses these same oversized options to show the art in detail. This is a great way to handle seeing something that you may not be able to experience in person. What makes it work so well is that the angles of the photography mimic how you would view it, looking up toward the piece hanging from the ceiling.

 

 

Simple Motion for Impact

Carrying on the theme of big, bold, and oversized designs, this trend focuses on simple animation for maximum impact.

While all-out cinematic animation can be fun to watch, it can be a little overwhelming at times. This more subtle approach is easier to digest and helps put the focus on the content at hand rather than the effect on the display.

There are plenty of ways to use simple animated effects, including scrolling animations, hover actions, and constantly moving elements. (You can see each of these if you click through the examples.)

The Patrick Mahomes store, 2PM, uses a single line of moving text that tells you what the website is about. It differentiates the retail store website from information about the athlete or his other efforts. White text on a black background is classic and easy to read. The most important thing of note may be the speed of the animation; it’s timed in a way that’s scannable but not dizzying. Sometimes the hardest part of nailing an animation is getting the speed right.

The resume-style website for Naomi Niko is striking and simple, but neat hover effects and a simple scroll animation for her resume only – and not the photo or details on the left side of the screen – make the design intriguing. The almost awkward crop and directional pull of her image also creates interest and makes you want to get further into the design.

Guilbo uses layered hover animation to make it look like he’s blowing a glittery-dust off the screen and at the user. The rugged detail of his face with the sparkle of the animation is a fun contrast. The design uses layering with dots in the foreground and background for an additional depth effect. It’s also especially nice that the objects are made to stay off his face for a realistic effect.

 

 

Conclusion

While 2020 has been an interesting year, designers have continued to find new ways to evolve the craft and create visual experiences that are inspiring. These trends are no exception.

It shows that even in unusual circumstances or with odd constraints, that amazing work and creativity can thrive. Stay creative everyone, and keep those new designs – and potential trends – coming!

Source


Source de l’article sur Webdesignerdepot

In part one of this blog, I provided a high-level introduction to SAP Systems, Clients, Landscapes, and Transports and how they might fit together in a ‘standard’ configuration. But like life, SAP tends to be a bit more complicated than that. The reality of marrying architectural constraints with complex business needs means that the kind of simple landscapes I described in my last piece often will not do the job. Something more complex is required.

In this article – part two of three – I will look at some of the more advanced concepts associated with SAP Landscape Design and how to manage the increased complexity that comes with them. 

Source de l’article sur DZONE

Every week users submit a lot of interesting stuff on our sister site Webdesigner News, highlighting great content from around the web that can be of interest to web designers.

The best way to keep track of all the great stories and news being posted is simply to check out the Webdesigner News site, however, in case you missed some here’s a quick and useful compilation of the most popular designer news that we curated from the past week.

Stroke Text CSS: The Definitive Guide

 

Code Snippets for Easier Coding

 

Textdb – A Simple Way to Share Small Amounts of Data

 

10+ Favicon Generators to Make your Brand Stand Out

 

12 CSS Grid Layouts

 

Applying Disney’s Basic Principles of Animation to UI Design

 

Curiosity Creates

 

Previewed – Beautiful Mockups & Graphics for your Next App

 

We’re in a Golden Age of UX. Why is Video Chat Still Stuck in the ’90s?

 

18+ CSS Book Effect

 

How to Promote a Mobile App with an Animated Explainer Video

 

Hyperlog – Portfolios for Developers

 

Site Design: Looks like You Need to Let it Out

 

Doing Stupid Stuff with GitHub Actions

 

Is it Good Design? Well, Yeah.

 

15 Free Adobe XD UI Kits for Web and Mobile App Designers

 

The Office as You Know it is Gone

 

How Interactive Content will Increase your Visitor’s Time on Page

 

What do Web Design Clients Need from Designers?

 

Truthmark is a Photography Database Aiming to Stop Misuse in Fake News

 

200+ NoCode Tool List by WeLoveNoCode

 

Designing for ‘Why?’

 

10 Tips Before You Buy a Domain Name

 

Making Memories to Last (August 2020 Wallpapers Edition)

 

Design Constraints are not Restraints – They Stoke Creativity

 

Want more? No problem! Keep track of top design news from around the web with Webdesigner News.

Source


Source de l’article sur Webdesignerdepot


What is Logic Programming?

Logic programming is a programming paradigm that sees computation as automatic reasoning over a database of knowledge made of facts and rules. It is a way of programming and is based on formal logic. A program in such a language is a set of sentences, in logical form, one that expresses facts and rules about a problem domain. Among others, Datalog is one such major logic programming language family.

Structure

Let’s talk about facts and rules. Facts are true statements — say, Bucharest is the capital of Romania. Rules are constraints that lead us to conclusions about the problem domain. These are logical clauses that express facts. We use the following syntax to write a rule (as a clause):


Source de l’article sur DZONE (AI)