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	<title>集群 - 四号程序员</title>
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		<title>MongoDB中缩减Shard集群(删除一个Shard)</title>
		<link>https://www.coder4.com/archives/3418</link>
					<comments>https://www.coder4.com/archives/3418#respond</comments>
		
		<dc:creator><![CDATA[coder4]]></dc:creator>
		<pubDate>Tue, 12 Jun 2012 13:29:53 +0000</pubDate>
				<category><![CDATA[大数据技术]]></category>
		<category><![CDATA[MongoDB]]></category>
		<category><![CDATA[Shard]]></category>
		<category><![CDATA[缩减]]></category>
		<category><![CDATA[集群]]></category>
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					<description><![CDATA[对MongoDB的Shard集群来说，添加一个分片很简单，AddShard就可以了。 但是缩减集群(删除分片)这种一般很少用到。由于曙光的某服务器又挂了，所以我们送修之前必须把它上面的数据自动迁移到其他Shard上。 以下内容翻译自：http://docs.mongodb.org/manual/tutorial/remove-shards-from-cluster/ 1、执行RemoveShard命令 db.runCommand( { removeshard: &#34;y[......] 继续阅读]]></description>
		
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		<title>Hadoop集群配置详细版</title>
		<link>https://www.coder4.com/archives/2812</link>
					<comments>https://www.coder4.com/archives/2812#respond</comments>
		
		<dc:creator><![CDATA[coder4]]></dc:creator>
		<pubDate>Thu, 26 Jan 2012 16:11:50 +0000</pubDate>
				<category><![CDATA[大数据技术]]></category>
		<category><![CDATA[Hadoop]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[配置]]></category>
		<category><![CDATA[集群]]></category>
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					<description><![CDATA[之前配置Hadoop的很多步骤不太详细，配置文件的许多优化点也没太搞清楚，重新写一下。 2012.06.22更新：Hadoop版本兼容到1.0.3。 0、ssh免密码登录 ssh-keygen -t rsa -P &#34;&#34; cat $HOME/.ssh/id_rsa.pub &#62;&#62; $HOME/.ssh/authorized_keys echo &#34;StrictHostKeyChecking no&#34; &#62;&#62; ~/.ssh/c[......] 继续阅读]]></description>
		
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		<title>Hadoop小集群(5结点)测试</title>
		<link>https://www.coder4.com/archives/2021</link>
					<comments>https://www.coder4.com/archives/2021#respond</comments>
		
		<dc:creator><![CDATA[coder4]]></dc:creator>
		<pubDate>Sun, 07 Aug 2011 05:59:09 +0000</pubDate>
				<category><![CDATA[Java]]></category>
		<category><![CDATA[Python]]></category>
		<category><![CDATA[大数据技术]]></category>
		<category><![CDATA[Hadoop]]></category>
		<category><![CDATA[Map]]></category>
		<category><![CDATA[Reduce]]></category>
		<category><![CDATA[实例]]></category>
		<category><![CDATA[集群]]></category>
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					<description><![CDATA[1、Map/Reduce任务 输入： 文件格式 id value 其中id是1~100之间的随机整数，value为1~100之间的随机浮点数。 输出： 每个id的最大value 生成这类文件，可以用python搞定，见本文末尾的附录。 2、Map/Reduce程序 这里就直接使用新(0.20.2)的API了，即org.apache.hadoop.mapreduce.*下的接口。 特别注意： job.setNumReduceTasks(5) 指定了本Job的Redu[......] 继续阅读]]></description>
		
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		<title>Hadoop集群配置</title>
		<link>https://www.coder4.com/archives/1761</link>
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		<dc:creator><![CDATA[coder4]]></dc:creator>
		<pubDate>Wed, 03 Aug 2011 07:33:45 +0000</pubDate>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[大数据技术]]></category>
		<category><![CDATA[Hadoop]]></category>
		<category><![CDATA[Rackspace]]></category>
		<category><![CDATA[配置]]></category>
		<category><![CDATA[集群]]></category>
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					<description><![CDATA[首先恢复单机配置，可以参考教程： http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ 本文大部分参考了这个《Hadoop集群配置教程》，非常感谢！ Master：10.182.165.114 node1 (Namenode 和 JobTracker) Slave：10.182.165.156 node2 1、下载、创建用户 /usr/sbin/add[......] 继续阅读]]></description>
		
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