Readable Java

There is a concept of an abstract file system in Hadoop that has several different subclass implementations, one of which is the HDFS represented by the Distributedfilesystem class. In the 1.x version of Hadoop, HDFS has a namenode single point of failure, and it is designed for streaming data access to large files and is not suitable for random reads and writes to a large number of small files. This article explores the use of other storage systems, such as OpenStack Swift object storage, as ...

The goal of this series is to redirect your awareness of functional thinking, to help you look at http://www.aliyun.com/zixun/aggregation/17253.html "> FAQ in a new way, and to improve your daily coding capabilities." This series explores the concept of functional programming, the framework that allows functional programming in the Java language, the functional programming language that runs on the JVM, and the future direction of language design. This series is designed for those who understand Java and how to smoke ...

Overview 2.1.1 Why a Workflow Dispatching System A complete data analysis system is usually composed of a large number of task units: shell scripts, java programs, mapreduce programs, hive scripts, etc. There is a time-dependent contextual dependency between task units In order to organize such a complex execution plan well, a workflow scheduling system is needed to schedule execution; for example, we might have a requirement that a business system produce 20G raw data a day and we process it every day, Processing steps are as follows: ...

The intermediary transaction SEO diagnoses Taobao guest cloud host technology Hall still has one hours to 2012, that can also have a bit of time to write a bit of spit things, hehe ... December 2011 is definitely my work since the maximum pressure of one months, has been busy to sleep less time, part-time reading less time, the body began to alarm, shoulder responsibility pressure I really breathless ... 　　As an ordinary north drift, in Beijing similar to me such a sea of humanity, especially in our industry. I love life very much, every minute is precious;

There are a few things to explain about prismatic first. Their entrepreneurial team is small, consisting of just 4 computer scientists, three of them young Stanford and Dr. Berkeley. They are using wisdom to solve the problem of information overload, but these PhDs also act as programmers: developing Web sites, iOS programs, large data, and background programs for machine learning needs. The bright spot of the prismatic system architecture is to solve the problem of social media streaming in real time with machine learning. Because of the trade secret reason, he did not disclose their machine ...

Web Services is a service-oriented technology that provides services through standard WEB protocols to ensure that application services on different platforms can interoperate. Depending on the application implemented by the Web Services specification, data can be exchanged with each other, regardless of the language, platform, or internal protocol they are using, which is the benefit of Web services. This article selects IBM WebSphere creator Server as a Transport for Web services ...

Cloud storage is a technology in cloud computing, and people are not too new about it. Many people think that cloud storage is synonymous with disk, high-performance disk, or Tier-1 disk and data deduplication. There is not a minority of this idea, in fact, this is entirely a misunderstanding of people, cloud storage is not the case at all, but it is precisely because of this misunderstanding, it can understand why Google Gmial account data recently using tape storage controversy and Surprised. Of course, tapes will continue to play in cloud storage, cloud backup, and cloud archiving, even if people have the wrong idea ...

Editor's note: The last period of time reproduced in the "5 minutes to understand docker! "Very popular, a short 1500 words, let everyone quickly understand the Docker." Today, I saw the author make a new novel, and immediately turned over. The reason to call this code reading as a fantasy trip is because the author Liu Mengxin (@oilbeater) in the process of reading Docker source, found a few interesting things: from the code point of view Docker did not start a new development mechanism, but the existing tested isolation security mechanism to use the full use, Including Cgroups,c ...

Protégé provides a knowledge based build domain Model tool. Its core is to achieve a rich set of knowledge modeling structure and action, support the creation, visualization and processing of various representations of the ontology. It can be customized, providing friendly domain support for creating knowledge models and data entry, and building knowledge-based tools and applications through extended plug-in architectures and java-based APIs. Protégé 4.2 Beta This version improves the Active Ontology tab interface and is more readable. Now launch ...

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 ...