Googleã2004å¹´ã«æå±ããåæ£å¦çæè¡MapReduceãããã¨ãæç¶ããmapã¨reduceã¨ãã2ã¤ã®å½¢å¼ã«åãã¦è¨è¿°ãããããã°ããã¼ã¿ãè¤æ°ã®è¨ç®æ©ã§åæ£å¦çã§ããããã«ãªãã¾ãã Googleãå©ç¨ãã¦ããMapReduceã®å®è£ ã¯å ¬éããã¦ãã¾ããããHadoopã¨ãããªã¼ãã³ã½ã¼ã¹ã®å®è£ ãå©ç¨ãããã¨ã§ãMapReduceãç°¡åã«è©¦ããã¨ãã§ãã¾ããå ·ä½çãªæ¹æ³ã¯ä»¥ä¸ã®éãã§ãï¼GNU/Linuxã®å ´åï¼ã詳細ã¯ã¯ã¤ãã¯ã¹ã¿ã¼ããåç §ã Sunã®JDKãã¤ã³ã¹ãã¼ã«ãã Hadoopããã¦ã³ãã¼ãã»å±éãã wget http://ftp.kddilabs.jp/infosystems/apache/hadoop/core/hadoop-0.20.1/hadoop-0.20.1.tar.gz tar zxf hadoop-0.20.1.tar.gz cd hadoop
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