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	<title>例子 - 四号程序员</title>
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		<title>WordCount的一个变种版本...Hadoop</title>
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		<pubDate>Fri, 20 Jan 2012 14:15:02 +0000</pubDate>
				<category><![CDATA[大数据技术]]></category>
		<category><![CDATA[Hadoop]]></category>
		<category><![CDATA[MapReduce]]></category>
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					<description><![CDATA[本来是要用Hadoop给柯西搜索写一下锚文本聚集。但是发现上个版本的爬虫居然没有存锚文本，实在无聊，写了个统计域名（实际是host）的计数器。 输入：一行一个url 流程：提取url的domain，对domain计数+1 输出：域名，域名计数 这次完全用新的API写的。 代码如下： Mapper package com.keseek.hadoop; import java.io.IOException; import java.net.URI; imp[......] 继续阅读]]></description>
		
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		<title>初试Gevent – 高性能的Python并发框架</title>
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		<pubDate>Thu, 05 May 2011 14:53:28 +0000</pubDate>
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					<description><![CDATA[Gevent是一个基于greenlet的Python的并发框架，以微线程greenlet为核心，使用了epoll事件监听机制以及诸多其他优化而变得高效。 于greenlet、eventlet相比，性能略低，但是它封装的API非常完善，最赞的是提供了一个monkey类，可以将现有基于Python线程直接转化为greenlet，相当于proxy了一下（打了patch）。 今天有空就迫不及待的试一下效果。 1、安装 Gevent依赖libevent和greenlet，需要分别安[......] 继续阅读]]></description>
		
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		<title>Linux下使用popen执行子进程并获得其输出</title>
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		<pubDate>Sun, 19 Dec 2010 16:42:45 +0000</pubDate>
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					<description><![CDATA[GString* exec_and_out(char* cmd) { GString* ret = g_string_new(""); FILE* stream = NULL; char buf[128]; size_t len = 0; //popen execute and open stream stream = popen(cmd, "r"); if (stream != NULL) { while (!feof(stream)) { len = fread([......] 继续阅读]]></description>
		
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