Technical Articles

hive is a Hadoop-based data warehouse tool that maps structured data files to a database table and provides full sql query capabilities to convert sql statements to MapReduce jobs. The advantage is low learning costs, you can quickly achieve simple MapReduce statistics through class SQL statements, without having to develop a dedicated MapReduce application, is very suitable for statistical analysis of data warehouse. Hadoop is a storage computing framework, mainly consists of two parts: 1, storage (...

PHP is a very popular open source server-side scripting language, and most of the sites you see on the World Wide Web are developed using PHP. This experience will introduce you to the 10 most common PHP development problems, hoping to be helpful to friends. Error 1: Leave a dangling pointer after a foreach loop In a foreach loop, if we need to change the elements of an iteration or in order to http://www.aliyun.com/zixun/aggregation/7208.html "> increase efficiency ...

Cloudera recently released a news article on the Rhino project and data at-rest encryption in Apache Hadoop. The Rhino project is a project co-founded by Cloudera, Intel and Hadoop communities. This project aims to provide a comprehensive security framework for data protection. There are two aspects of data encryption in Hadoop: static data, persistent data on the hard disk, data transfer, transfer of data from one process or system to another process or system ...

"Joseph Ring" is a mathematical application of the problem: a group of monkeys in a circle, according to 1,2, ..., n followed by numbers. Then from the first start, the number to the mth, kick it out, start it behind it, count it again, kick it out ... and keep doing so until the end Only one monkey left, the monkey is called the king. Requires programming simulation of this process, enter m, n, output the last king number. The following is a list of three ways to solve this problem with PHP: According to the logic in order to remove recursive algorithm linear table Application Method One: According to the logic of ...

Not long ago I provided 12 suggestions to adjust Ubuntu. However, it has been a while ago, and now we have made another 10 suggestions that will make your Ubuntu your home away from home. These 10 suggestions are easy to implement, so let's get started! 1. Install TLP We touched on TLP not long ago, a software that optimizes power settings and allows you to enjoy longer battery life. Before we go into the TLP in-depth, and we also mentioned in the list of this software is not bad. want...

& nbsp; Data visualization is a powerful weapon for communicating complex information, through which our brains can better capture and save valid information, Increase the impression of information, but if the data visualization to do weak, but will have a negative effect. The wrong expression will damage the spread of data, completely misinterpreting them so excellent ...

With the development of Docker, the ecosystem of Docker is getting more and more mature. There are many open source projects related to Docker on GitHub. Recently, CenturyLink summarized 10 blogs based on Docker's development tools, mainly on http://www.aliyun.com/zixun/aggregation/14123.html"> PaaS platform, cluster management, continuous integration and Docker Management tools, etc. four ...

JQuery Form Validation Plugin jQuery Form Validation Plugin is an excellent jQuery plugin that validates client forms and offers many customizable properties and methods with good scalability and maximum usage A form validation method. After verification of different projects worldwide, and won the praise of many Web developers. jQuery -...

Having just announced the easing of computing and memory limitations, Teradata promptly announced the acquisition of R-language analytics capabilities from Aster and announced the acquisition of Revelytix and Hadapt by Teradata Labs. The former focuses primarily on data management on Hadoop, while Hadapt is a focused SQL-on-Hadoop company. Clearly, Teradata is accelerating its efforts to build a unified data architecture. Construct a unified data structure In fact, structured data and unstructured data through traditional SQL analysis and ...

FastCoLabs invited several reputable bloggers to answer their most iconic visualizations and their reasons. The three invited speakers were Robert Kosara of Eager Eyes, Andy Kirk of Visualising Data, and National Public Radio Data Editor http://www.aliyun.com/zixun/aggregation/10961.html "& ...

Today, a variety of online and offline http://www.aliyun.com/zixun/aggregation/11773.html "> programming tools emerge in an endless stream, but really easy to use but few, or pile up too much without function, Either the lack of key features. The following Huidu control network for everyone finishing the 7 quality but 7478.html "> little-known programming tools, a look at it! 1) Arabica Arabica is ...

The next goal of Sandstorm.io is to make it easier for people to run personal Web App. It allows users to have their own server, through an interface similar to the App Store to enter, users can install their own App, just like installing App on your phone. About Sandstorm We often talk about privacy, security, control and other issues. Tell you a secret: The so-called privacy and security are not really the main reason Sandstorm exists, they're just by-products. Make ...

Earlier, we were already running Hadoop on a single machine, but we know that Hadoop supports distributed, and its advantage is that it is distributed, so let's take a look at the environment. Here we use a strategy to simulate the environment. We use three Ubuntu machines, one for the master and the other two for the slaver. At the same time, this host, we use the first chapter to build a good environment. We use the steps similar to the first chapter to operate: 1, the operating environment to take ...

Spark is a memory-based, open-source cluster computing system designed for faster data analysis. Spark was developed using Scala by Matei, AMP Labs, University of California, Berkeley. The core part of the code is only 63 Scala files, which is very lightweight. Spark provides an open source clustered computing environment similar to Hadoop, but Spark performs better on some workloads based on memory and iteratively optimized designs. & nbs ...

After creating a good relationship with the customer, one should consider how to maintain the relationship with the customer, which is not an easy task, of course. However, this is extremely important for the survival and growth of the business. In order to maintain these delicate relationship, CRM system is essential. Open source world, will not leave CRM. Let's take a quick look at these top 5 open source CRM systems. This article is not a simple checklist. Each of the CRM systems listed highlights their excellence and strength. What is CRM? CRM is user relationship ...

A suitable plug-in means that it adapts to different development environments, and Sublime Text and TextMate are great examples. Do you know that Xcode also supports plug-ins? I would not be surprised if you did not know it, because Apple did not spend much time promoting this feature of Xcode, and there is very little documentation available on the web to create plug-ins for Xcode. Fortunately this does not prevent developers from creating plug-ins for Xcode. In this article, I will recommend 10 for my daily use of plug-ins, I hope they can be developed in ...

These are the 15 plug-ins that were very useful for your Wordpress site in 2014. These plug-ins can greatly enhance the expressiveness of your Wordpress site. Wordpress is one of the leading CMS platforms in web development. Because of the flexibility of Wordpress plug-ins, they can easily be downloaded and used to easily set up a web publishing platform. With several plug-ins on the bottom, your website's expressiveness will be greatly enhanced. & nb ...

Here are 5 very useful resources, they have been completely or completely from my layman to now I have been able to understand and exchange some web technologies, along the way there is their companionship and help. 1.Bentobox.IO http://www.bentobox.io/ Bentobox is a comprehensive plan on how to learn multiple programming languages ​​and web based. If you do not know anything about programming then you should choose to start programming with Bentobox. 2.Hacker N ...

First, write in front of the IIS version currently used on the market are estimated to be> = 6. Therefore, we mainly to the following three versions Explain the server version IIS default version server20036.0server20087.0server20128.0 ...

As a designer specializing in design work, they usually have the broadest horizons and the most sensitive sense of smell in choosing interaction and prototyping tools. As a new distribution and exchange platform, Medium offers designers a new horizon from model to work prototype. At the same time, designers can learn from each other and learn from each other. Here's a quick summary of the popular interactive prototyping tools 3721.html "> Popular in the first half of 2014. Webflow ($ 16 / month, Web Application ...