Static Class Definition

This article is my second time reading Hadoop 0.20.2 notes, encountered many problems in the reading process, and ultimately through a variety of ways to solve most of the. 　　Hadoop the whole system is well designed, the source code is worth learning distributed students read, will be all notes one by one post, hope to facilitate reading Hadoop source code, less detours. 1 serialization core Technology The objectwritable in 0.20.2 version Hadoop supports the following types of data format serialization: Data type examples say ...

Caught in cats throughout the week. From the end of October to the present day, it touches on the more cherished everyday moments of quiet time. Sometimes wondering whether there is time-space whirlpool at home or something, or how the watch will go so fast, not at all, do not want to stop waiting for me. Everything will be better. Monologue ended, enter the topic. The last two translations have both a framework and cross-platform topic: In the previous article, we learned of some of the front-end framework tools for mobile application development; today's foothold is upstream of the design development process, We show how to use F ...

The road to computer science is littered with things that will become "the next big thing". Although many niche languages do find some place in scripts or specific applications, C (and its derivatives) and Java languages are hard to replace. But Red Hat's Ceylon seems to be an interesting combination of some language features, using the well-known C-style syntax, but it also provides object-oriented and some useful functional support in addition to simplicity. Take a look at Ceylon and see this future VM ...

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This article describes how to set up a large number of spoke VPNs by using quick mode selector source definitions on the spoke FortiGates and the dialup VPN configurations on the hub FortiGates.

Translation: Esri Lucas The first paper on the Spark framework published by Matei, from the University of California, AMP Lab, is limited to my English proficiency, so there must be a lot of mistakes in translation, please find the wrong direct contact with me, thanks. (in parentheses, the italic part is my own interpretation) Summary: MapReduce and its various variants, conducted on a commercial cluster on a large scale ...

Knowing how the MapReduce program works, the next step is to implement it through code. We need three things: a map function, a reduce function, and some code to run the job. The map function is represented by the Mapper interface implementation, which declares a map () method. 　　Example 2-3 shows our map function implementation. Example 2-3. Find the highest temperature of the mapper import java.io.IOException; &http ...

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The so-called interactive design, in fact, is the design of how people send instructions to the machine, how the machine to convey information to people, Shilai is for interaction. When you want to convey a small amount of information, good to do, like Google's search box, to a white bottom on the line. But when the information is massive and difficult to render all on a screen, it is necessary to organize the information effectively, hide some of the information first, and then lead the user to it when they need it. In the interface design, broadly speaking, the process of transferring a group of information to another group of information is called navigation. Clearly defined, we should ...

The REST service can help developers to provide services to end users with a simple and unified interface. However, in the application scenario of data analysis, some mature data analysis tools (such as Tableau, Excel, etc.) require the user to provide an ODBC data source, in which case the REST service does not meet the user's need for data usage. This article provides a detailed overview of how to develop a custom ODBC driver based on the existing rest service from an implementation perspective. The article focuses on the introduction of ODBC ...