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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 ...
excel tutorial to generate the excel file source code class excel {/ ** * header excel file (prefix line) * * xml specifications copied from excel. * ...
Note: The latest hbase shell has canceled hql support, which means that the INSERT and query SQL statements in the following data are not available. For efficiency reasons, there are now only a few ways to work with data, such as Get,put,scan. Url:http://hadoop.apache.org/hbase/docs/r0.1.1/api/overview-summary.html built on the HDFS based on the building 1: Modify Hadoop/contrib ...
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PHP Tutorials use Phpexcel to generate an Excel document instance//ini_set ("Display_errors", 1);//whether to display an error message//ini_set (' include_path ', Ini_get (' Include_ Path '). ' Require_once ("./1.7.2/classes/phpexcel.php"); Require_o ...
The front has written a big frame, seems a little general, because there is no point of the graphic analysis. Recently used a more table, this article specifically on the table readability to make a systematic summary, by the way http://www.aliyun.com/zixun/aggregation/16911.html "> Readability-framework updated to v1.1. The following figure: The history of the retrospective table (table), the earliest designers like to use a table layout, because the visual simple intuitive, from ...
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