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This article describes how to deploy Apache to Hadoop 2.2.0, http://www.aliyun.com/zixun/aggregation/14417.html". If your Hadoop is another version, such as CDH4, you can refer directly to the official Explain the operation. Need to pay attention to two points: (1) the Hadoop must be 2.0 series, such as 0.23.x, 2.0.x, 2.xx or CDH4, CDH5 ...

The procedure is actually very simple, but the document is not very detailed, leading to the whole process of exploration, to organize a share for everyone. 　　1, download URL: HTTP://GIT.APACHE.ORG/2, the necessary software maven this need to note, do not download the latest 3.1.1, but download the 3.0.5, because 3.1.1 a bug can cause trouble. 　　This is the Red Hat, IBM does not use the latest version of the reason, known as stable in fact there are major bugs. Http://ji ...

In our daily life, we are inseparable from the application of position recognition class. Apps like Foursquare and Facebook help us share our current location (or the sights we're visiting) with our family and friends. Apps like Google Local help us find out what services or businesses we need around our current location. So, if we need to find a café that's closest to us, we can get a quick suggestion via Google Local and start right away. This not only greatly facilitates the daily life, ...

WRO4J is a tool for analyzing and optimizing the Java Web Application page http://www.aliyun.com/zixun/aggregation/12000.html "> Load time." It helps you keep the management of static resources (JavaScript and CSS), use a simple filter to consolidate and reduce their uptime, use the MAVEN plug-in to reduce the build time, and have a variety of capabilities for working with Web resources. Wro4j ...

There seems to be a plot in a thriller that says, "It's easy ... It's so easy. "And then all things began to fall apart. When I started testing the top-tier Java cloud Computing in the market, I found that the episode was repeating itself. Enterprise developers need to be more concerned about these possibilities than others. Ordinary computer users get excited when there are new scenarios in cloud computing that make life easier. They will use cloud-based emails and if the emails are lost they can only shrug their shoulders because the electrons ...

This article also discusses some of the constraints of using reverse Ajax technology on the server side. Users now expect to be able to access fast, dynamic applications from the Web. This series of articles shows how to use reverse Ajax http://www.aliyun.com/zixun/aggregation/7332.html "> Technology to develop event-driven Web applications." Reverse Ajax, Part 1th: Comet Introduction to reverse Ajax, polling ...

This series of articles shows you how to develop event-driven WEB programs using reverse Ajax technology. The 1th part describes Reverse Ajax, polling, streaming, Comet, and long polling. Part 2nd describes how to implement Reverse Ajax using WebSocket, and discusses the limitations of using Comet and WebSocket WEB servers. The 3rd part explores when you need to support multiple servers or provide a user with the upper portion of your server ...

Officefloor is a reverse control that provides a real-time Web application that focuses on multi-threaded dependency injection methods rather than objects. It increases the existing dependency injection framework by allowing you to specify how the thread executes, and the existing dependency injection framework usually assumes that the single execution thread restricts your threading design. Officefloor deletes this assumption, so you can use different threads to perform different functions of the application. Officefloor 2.2.0 This version adds GWT's DEVMODE integration to http:/...

This series of articles shows you how to use reverse Ajax http://www.aliyun.com/zixun/aggregation/7332.html "> Technology to develop event-driven WEB programs." The 1th part describes reverse Ajax, polling, streaming, Comet, and long polling. Part 2nd describes how to use WebSocket and discusses the limitations of WEB servers that use Comet and WebSocket. The first ...

After completing the four basic learning steps of Apache Cassandra, you can try the actual code. If necessary, it is recommended to briefly review: Apache Cassandra Learning Step (1) Apache Cassandra Learning Ste ...