Groovy is a burgeoning Java 2 platform language. Groovy code can be combined well with Java code to extend existing code. The current Groovy version is 1.6.3, available on both Java 1.4 and Java 5 platforms, and can also be used on Java 6. Groovy is an alternative language for the JVM-alternative is to use groovy on the Java Platform Java programming, the use of basic and use ...
This is the second of the Hadoop Best Practice series, and the last one is "10 best practices for Hadoop administrators." Mapruduce development is slightly more complicated for most programmers, and running a wordcount (the Hello Word program in Hadoop) is not only familiar with the Mapruduce model, but also the Linux commands (though there are Cygwin, But it's still a hassle to run mapruduce under windows ...
In this paper, we will discuss the technique of using Ant's own function to realize the parameter value of the automatic discovery system. Apache Ant is widely used in the process of automated compilation, packaging, and deployment of Java development. When using ANT for a package deployment, you often need to enter some system environment parameters, such as host name, IP address, configuration file path for some services, and some http://www.aliyun.com/zixun/aggregation/18477.html" ...
The automation construction process is divided into several links, each link is a prerequisite. The build framework described in this article encapsulates each link in the build process as a subtask of the Ant script, and is scheduled through the Builds master task. The build Master task, as well as the creation of the scripting framework, has been introduced in part 1th of this series, and this article introduces the construction process of the code in detail. Readers can refer to the code examples in this article to complete the remainder of the code to achieve a complete build framework. When writing build scripts, readers may need to customize a ...
This article describes the basic concepts and methodologies for building a project based on http://www.aliyun.com/zixun/aggregation/14417.html ">apache Maven 3." Maven is a set of standard project building and management tools, using a unified normative script for project building, easy to use, discarding the cumbersome building elements in Ant, and highly reusable. After reading this article, you will learn about Maven's basic concepts and use it for project ...
Oozie is the open source scheduling tool on the Hadoop platform, which has been used Oozie for nearly a year in the project, and the Oozie installation configuration is quite complex. In order to use it conveniently, a lot of configuration needs to be done. The following is a set of steps for Oozie installation configuration, for the use of Hadoop and Oozie children's shoes for reference, but also easy to see their own. 1 Decompression installation package TAR-XZF oozie-3.3.2-distro.tar.gz 2 modified addtowar.sh foot ...
Hadoop is a magical creation, but it develops too quickly and shows some flaws. I love elephants and elephants love me. But there is nothing perfect in this world, and sometimes even good friends clash. Just like the struggle between me and Hadoop. Here are 12 pain points I've listed. 1. Pig vs. Hive You can't use Hive UDFS in Pig. In the Pig ...
Chapter author Andrew C. Oliver is a professional software advisor and president and founder of the Open Software re-programme of North Carolina State Dalem data consulting firm. Using Hadoop for a long time, he found that 12 things really affected the ease of use of Hadoop. Hadoop is a magical creation, but it develops too quickly and shows some flaws. I love elephants and elephants love me. But there is nothing perfect in this world, sometimes even good friends ...
First, the Hadoop project profile 1. Hadoop is what Hadoop is a distributed data storage and computing platform for large data. Author: Doug Cutting; Lucene, Nutch. Inspired by three Google papers 2. Hadoop core project HDFS: Hadoop Distributed File System Distributed File System MapReduce: Parallel Computing Framework 3. Hadoop Architecture 3.1 HDFS Architecture (1) Master ...
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