{"id":456,"date":"2021-02-19T15:46:48","date_gmt":"2021-02-19T06:46:48","guid":{"rendered":"https:\/\/www.opentone.co.jp\/optonlabos\/?p=456"},"modified":"2025-05-12T10:06:22","modified_gmt":"2025-05-12T01:06:22","slug":"hadoop%e5%ad%a6%e7%bf%92%ef%bd%9e%e5%9f%ba%e7%a4%8e%ef%bd%9e","status":"publish","type":"post","link":"https:\/\/www.opentone.co.jp\/ot-lab\/all\/uncategorized\/hadoop%e5%ad%a6%e7%bf%92%ef%bd%9e%e5%9f%ba%e7%a4%8e%ef%bd%9e","title":{"rendered":"Hadoop\u5b66\u7fd2\uff5e\u57fa\u790e\uff5e"},"content":{"rendered":"\n<p>\u30d3\u30c3\u30b0\u30c7\u30fc\u30bf\u6d3b\u7528\u306b\u3088\u308b\u69d8\u3005\u306a\u30d3\u30b8\u30cd\u30b9\u30e2\u30c7\u30eb\u304c\u691c\u8a0e\u3001\u5b9f\u8df5\u3055\u308c\u3066\u3044\u308b\u6628\u4eca\u3002<br>\u65e5\u3005\u5897\u3048\u7d9a\u3051\u308b\u81a8\u5927\u306a\u30c7\u30fc\u30bf\u3092\u3069\u306e\u3088\u3046\u306b\u51e6\u7406\u307e\u305f\u306f\u6574\u7406\u3057\u305f\u30c7\u30fc\u30bf\u3092\u3001\u65b0\u305f\u306a\u30d3\u30b8\u30cd\u30b9\u306b\u304a\u3051\u308b\u5206\u6790\u5bfe\u8c61\u30c7\u30fc\u30bf\u3068\u3057\u3066\u3069\u306e\u3088\u3046\u306b\u6709\u52b9\u6d3b\u7528\u3059\u308b\u304b\u304c\u5927\u304d\u306a\u547d\u984c\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30d3\u30c3\u30b0\u30c7\u30fc\u30bf\u3092\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c\u5b58\u5728\u3057\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u4ed5\u65b9\u3082\u69d8\u3005\u3067\u3042\u308b\u304c\u3001\u5927\u304d\u306a\u554f\u984c\u306e\u3072\u3068\u3064\u3068\u3057\u3066\u30b9\u30ad\u30eb\u4e0d\u8db3\u3067\u3042\u308b\u3053\u3068\u304c\u3042\u3052\u3089\u308c\u3001\u3053\u308c\u306f\u30b7\u30b9\u30c6\u30e0\u3092\u4f9d\u983c\u3059\u308b\u5074\u3001\u4f5c\u6210\u3059\u308b\u5074\u306e\u53cc\u65b9\u306b\u304a\u3044\u3066\u30d3\u30c3\u30b0\u30c7\u30fc\u30bf\u306e\u5206\u6790\u3001\u6d3b\u7528\u306e\u305f\u3081\u306e\u4eba\u6750\u4e0d\u8db3\u304c\u61f8\u5ff5\u3055\u308c\u308b\u3066\u3044\u308b\u305d\u3046\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u306a\u308b\u307b\u3069\u30fb\u30fb\u30fb\u9700\u8981\u306b\u4f9b\u7d66\u304c\u8ffd\u3044\u4ed8\u3044\u3066\u3044\u306a\u3044\u72b6\u6cc1\u306a\u306e\u3060\u306a\u3002<br>\u306a\u3089\u3070\u5f0a\u793e\u306e\u30e1\u30f3\u30d0\u30fc\u304c\u958b\u767a\u306b\u643a\u308f\u3063\u3066\u3044\u308b\u300cHadoop\u300d\u306b\u95a2\u3059\u308b\u5f15\u304d\u5408\u3044\u3082\u5897\u3048\u308b\u306e\u3067\u306f\uff1f<br>\u3082\u3046\u3084\u3063\u3066\u3044\u308b\u3088\uff01\u3068\u3044\u3046\u30c4\u30c3\u30b3\u30df\u304c\u805e\u3053\u3048\u3066\u304d\u305d\u3046\u3067\u3059\u304c\u3001\u4eca\u56de\u306fkoglen\u304c\u81ea\u5df1\u5b66\u7fd2\u3057\u305f\u300cHadoop\u300d\u306b\u3064\u3044\u3066\u306e\u7279\u5fb4\u3084\u5468\u8fba\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u300cHadoop\u300d\u3068\u306f<\/strong><\/h4>\n\n\n\n<p>\u300cHadoop\u300d\u306f\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u4e26\u5217\u5206\u6563\u51e6\u7406\u57fa\u76e4\u3067\u3042\u308a\u3001Java\u3092\u30d9\u30fc\u30b9\u306bIA\uff08Intel Architecture)\u30b5\u30fc\u30d0\u30fc\u3092\u5229\u7528\u3057\u3066\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u9ad8\u901f\u306b\u51e6\u7406\u3067\u304d\u308b\u3002<br>\u7528\u9014\u3068\u3057\u3066\u306f\u3001\u30ed\u30b0\u89e3\u6790\u3084\u30ec\u30b3\u30e1\u30f3\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30f3\u30b8\u30f3\u3001\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u3068\u3057\u3066\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u5927\u304d\u304f\u306f\u4ee5\u4e0b\u306e2\u3064\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>HDFS\uff08Hadoop Distributed File System\uff09\uff1a\u5206\u6563\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0<\/li><li>MapReduce\uff08Hadoop MapReduce Framework\uff09\uff1a\u5927\u898f\u6a21\u5206\u6563\u51e6\u7406FW<\/li><\/ul>\n\n\n\n<p>\u300cHadoop\u300d\u306e\u5229\u7528\u306b\u9069\u3057\u305f\u30c7\u30fc\u30bf\u9818\u57df\u306f\u3001\u30c6\u30e9\u30d0\u30a4\u30c8\u3001\u30da\u30bf\u30d0\u30a4\u30c8\u30af\u30e9\u30b9\u306e\u30c7\u30fc\u30bf\u306e\u30d0\u30c3\u30c1\u51e6\u7406\u306b\u3042\u305f\u308a\u3001RDMS\u3068\u6bd4\u8f03\u3059\u308b\u3068\u305d\u306e\u7279\u5fb4\u304c\u7406\u89e3\u3057\u3084\u3059\u3044\u305f\u3081\u4ee5\u4e0b\u306b\u6bd4\u8f03\u8868\u3092\u8a18\u8f09\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"616\" height=\"109\" src=\"https:\/\/www.opentone.co.jp\/optonlabos\/wp-content\/uploads\/sites\/11\/2021\/02\/5bd156fc0f4e676ff6934beaeca674921.gif\" alt=\"\" class=\"wp-image-459\" \/><\/figure><\/div>\n\n\n\n<p>\u4e0a\u8a18\u306e\u3068\u304a\u308a\u30c7\u30fc\u30bf\u3092\u5229\u7528\u3059\u308b\u3046\u3048\u3067\u306e\u7279\u5fb4\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u5927\u91cf\u30c7\u30fc\u30bf\u306e\u524d\u6bb5\u968e\u306e\u51e6\u7406\u3092Hadoop\u3067\u5b9f\u65bd\u3057\u3001\u7d50\u679c\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066RDBMS\u306b\u3088\u308b\u53c2\u7167\u7ba1\u7406\u3068\u3059\u308b\u306e\u304c\u671b\u307e\u3057\u3044\u3088\u3046\u3067\u3059\u3002<br>\u3055\u3066\u300cHadoop\u300d\u306e\u5927\u307e\u304b\u306a\u7279\u5fb4\u304c\u308f\u304b\u3063\u305f\u3068\u3053\u308d\u3067\u3001\u4e8b\u524d\u306b\u8a18\u8f09\u3057\u305f\u30e1\u30a4\u30f3\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u3064\u3044\u3066\u306e\u8aac\u660e\u3082\u7c21\u5358\u306b\u8a18\u8f09\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">HDFS\u306b\u3064\u3044\u3066<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u30671\u3064\u306e\u5de8\u5927\u306a\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u6210\u3057\u3066\u304a\u308a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u6027\u304c\u3042\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5de8\u5927\u306a\u30d5\u30a1\u30a4\u30eb\u3092\u4f7f\u3048\u308b<\/li><\/ul>\n\n\n\n<p>HDFS\u3067\u306f\u8907\u6570\u306eDataNodo\u306b\u3064\u306a\u304c\u308b\u591a\u304f\u306eHDD\u3092\u675f\u306d\u3066\u4f7f\u3046\u4ed5\u7d44\u307f\u304c\u5b9f\u73fe\u3055\u308c\u3066\u3044\u308b\u3002\u3057\u304b\u3057\u3001\u6570\u3042\u308b\u5c0f\u3055\u306a\u30d5\u30a1\u30a4\u30eb\u3092\u7ba1\u7406\u3059\u308b\u306e\u306b\u306f\u5411\u3044\u3066\u3044\u306a\u3044\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u30a2\u30af\u30bb\u30b9\u3067\u9ad8\u3044\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u51fa\u305b\u308b<\/li><\/ul>\n\n\n\n<p>HDFS\u3067\u306f\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u304c\u5927\u304d\u304f\u8a2d\u8a08\u3055\u308c\u3066\u304a\u308a\u3001\u5927\u304d\u306a\u30d5\u30a1\u30a4\u30eb\u306b\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u4f5c\u308a\u306b\u306a\u3063\u3066\u3044\u308b\u3002<br>\u307e\u305f\u3001HDFS\u306b\u4e00\u5ea6\u683c\u7d0d\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u306f\u547c\u3073\u51fa\u3059\u3060\u3051\u306e\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3092\u60f3\u5b9a\u3057\u3066\u304a\u308a\u66f4\u65b0\u306f\u3067\u304d\u305a\u3001\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u306f\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u6307\u5b9a\u306b\u3088\u308a\u5909\u66f4\u304c\u53ef\u80fd\u3067\u3042\u308b\u304cDataNodo\u304c\u4f7f\u7528\u3059\u308b\u30e1\u30e2\u30ea\u306f\u5897\u52a0\u3059\u308b\u305f\u3081\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e64MB\u3088\u308a\u3082128MB\u306e\u65b9\u304c\u591a\u304f\u306e\u5834\u5408\u52b9\u7387\u304c\u826f\u3044\u3068\u3044\u3046\u7279\u5fb4\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>DataNode\u306e\u4e00\u90e8\u304c\u6545\u969c\u3057\u3066\u3082\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u640d\u5931\u3092\u56de\u907f\u3067\u304d\u308b<\/li><\/ul>\n\n\n\n<p>\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3001\u30e9\u30c3\u30af\u30a2\u30a6\u30a7\u30a2\u30cd\u30b9\u3001BackupNode\u3068\u3044\u3063\u305f\u6a5f\u80fd\u3092\u6301\u3064\u3053\u3068\u306b\u3088\u308a\u30d5\u30a1\u30a4\u30eb\u640d\u5931\u3092\u56de\u907f\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5bb9\u91cf\u306b\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u304c\u3042\u308b<\/li><\/ul>\n\n\n\n<p>\u30b9\u30ec\u30fc\u30d6\u30ce\u30fc\u30c9\u3067\u3042\u308bDataNode\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u3001HDFS\u306e\u5bb9\u91cf\u3092\u81ea\u7531\u306b\u62e1\u5f35\u3067\u304d\u308b<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>HDFS\u30a4\u30e1\u30fc\u30b8\u3068\u7528\u8a9e\u8aac\u660e<br><strong>DataNodo<\/strong>\uff1a\u56fa\u5b9a\u9577\u306b\u533a\u5207\u3089\u308c\u305f\u300c\u30d6\u30ed\u30c3\u30af\u300d\u3068\u3044\u3046\u584a\u3054\u3068\u306b\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3059\u308b<br><strong>NameNode\uff1a<\/strong>\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u7ba1\u7406\u3001DataNode\u306e\u6b7b\u6d3b\u76e3\u8996\u3001HDFS\u306e\u4f7f\u7528\u72b6\u6cc1\u306e\u78ba\u8a8d\u306a\u3069\u3092\u7ba1\u7406\u3059\u308b<\/p><\/blockquote>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft size-large\"><img decoding=\"async\" width=\"617\" height=\"427\" src=\"https:\/\/www.opentone.co.jp\/optonlabos\/wp-content\/uploads\/sites\/11\/2021\/02\/HDSF-1.gif\" alt=\"\" class=\"wp-image-460\" \/><\/figure><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">MapReduce\u306b\u3064\u3044\u3066<\/h4>\n\n\n\n<p>Google\u793e\u306b\u3088\u3063\u3066\u8003\u6848\u3055\u308c\u305f\u5206\u6563\u51e6\u7406\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u3092\u5206\u6563\u51e6\u7406\u3059\u308b\u306e\u306b\u90fd\u5408\u306e\u826f\u3044\u3088\u3046\u306b\u3001Map\u51e6\u7406\u3068Reduce\u51e6\u7406\u3068\u3044\u3046\u30d5\u30a7\u30fc\u30ba\u306b\u5206\u3051\u3066\u6574\u7406\u3055\u308c\u308b\u3002<br>MapReduce\u306f\u3001\u30c7\u30fc\u30bf\u3092Key\u3068Value\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u6271\u3044\u3001Key\u3068Value\u306e\u5024\u306e\u7d44\u306b\u3057\u3066\u51fa\u529b\u3059\u308b\u51e6\u7406\u3092Map\u51e6\u7406\u3001Key\u5024\u3054\u3068\u306b\u30c7\u30fc\u30bf\u3092\u96c6\u3081\u3066\u51e6\u7406\u3059\u308b\u3053\u3068\u3092Reduce\u51e6\u7406\u3068\u3044\u3046\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Map\u51e6\u7406\uff1a\u30c7\u30fc\u30bf\u304b\u3089\u51e6\u7406\u3092\u5143\u306bKey\u3068Value\u306e\u7d44\u3092\u62bd\u51fa\u3059\u308b\u51e6\u7406<\/li><li>Reduce\u51e6\u7406\uff1a\u62bd\u51fa\u3055\u308c\u305fKey\u3068Value\u304b\u3089\u76ee\u7684\u306e\u7d50\u679c\uff08Key\u3068Value\uff09\u3092\u5f97\u308b\u305f\u3081\u306e\u51e6\u7406<\/li><\/ul>\n\n\n\n<p>\u300cHadoop\u300d\u3067\u306f\u3001\u4e0a\u8a18\u306e\u51e6\u7406\u3092\u30de\u30b9\u30bf\u30fc\u30b5\u30fc\u30d0\u3068\u591a\u6570\u306e\u30b9\u30ec\u30fc\u30d6\u30b5\u30fc\u30d0\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u69cb\u6210\u3055\u308c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u6027\u304c\u3042\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u9ad8\u3044\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3092\u6301\u3064<\/li><\/ul>\n\n\n\n<p>Map\u51e6\u7406\u3084Reduce\u51e6\u7406\u306f\u3001\u51e6\u7406\u5bfe\u8c61\u306e\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u8907\u6570\u306e\u30ef\u30fc\u30ab\u304c\u540c\u3058\u51e6\u7406\u3092\u4e26\u5217\u306b\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<br>Map\u3001Reduce\u30d5\u30a7\u30fc\u30ba\u3068\u3082\u306b\u30ef\u30fc\u30ab\u306e\u6570\u3092\u5897\u3084\u3059\u3053\u3068\u3067\u7c21\u5358\u306b\u9ad8\u3044\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u304c\u5b9f\u73fe\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u51e6\u7406\u306e\u7d99\u7d9a\u6027\u304c\u9ad8\u3044<\/li><\/ul>\n\n\n\n<p>1\u3064\u306e\u30ef\u30fc\u30ab\u306b\u7570\u5e38\u304c\u767a\u751f\u3057\u3066\u7d99\u7d9a\u3067\u304d\u306a\u304f\u306a\u3063\u305f\u5834\u5408\u3067\u3082\u3001\u4ed6\u306e\u30ef\u30fc\u30ab\u306b\u518d\u5ea6\u540c\u3058\u51e6\u7406\u3092\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u5168\u3066\u306e\u51e6\u7406\u3092\u6700\u521d\u304b\u3089\u5b9f\u65bd\u3057\u306a\u304f\u3066\u3082\u826f\u3044\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u30c7\u30fc\u30bf\u306e\u5c40\u6240\u6027\u3092\u8003\u616e\u3057\u305f\u51e6\u7406\u30b3\u30b9\u30c8\u306e\u4f4e\u6e1b<\/li><\/ul>\n\n\n\n<p>Map\u51e6\u7406\u306f\u6975\u529bTaskTracker\u3068\u540c\u3058\u30ce\u30fc\u30c9\u3067\u8d77\u52d5\u3057\u3066\u3044\u308bHDFS\u306eDataNode\u306e\u30c7\u30fc\u30bf\u3092\u5229\u7528\u3057\u3088\u3046\u3068\u3057\u3001JobTracker\u306fHDFS\u306e\u30c7\u30fc\u30bf\u5c40\u6240\u6027\u3092\u8003\u616e\u3057\u3066\u540c\u3058\u30ce\u30fc\u30c9\u306eTraskTracker\u306b\u51e6\u7406\u3092\u5272\u308a\u5f53\u3066\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u3084\u308a\u53d6\u308a\u3067\u767a\u751f\u3059\u308b\u901a\u4fe1\u3092\u6291\u3048\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5e2f\u57df\u3092\u7bc0\u7d04\u3057\u305f\u308a\u3001\u901a\u4fe1\u30b3\u30b9\u30c8\u3092\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>MapReduce\u30a4\u30e1\u30fc\u30b8\u3068\u7528\u8a9e\u8aac\u660e<br><strong>JobTracker\uff1a<\/strong>Hadoop\u306e\u30de\u30b9\u30bf\u30fc\u30ce\u30fc\u30c9\u3067\u3042\u308a\u3001MapReduceFW\u304c\u63d0\u4f9b\u3059\u308b\u5206\u6563\u51e6\u7406\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306e\u30de\u30b9\u30bf\u30fc\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308bJava\u30d7\u30ed\u30bb\u30b9<br><strong>TaskTracker\uff1a<\/strong>Hadoop\u306e\u30b9\u30ec\u30fc\u30d6\u30ce\u30fc\u30c9\u3067\u3042\u308a\u3001TaskTracker\u306fHadoop\u306eMapReduceFW\u306e\u4e2d\u3067\u3001Map\u51e6\u7406\u304a\u3088\u3073Reduce\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306e\u30ef\u30fc\u30ab\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b<\/p><\/blockquote>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft size-large\"><img decoding=\"async\" width=\"619\" height=\"390\" src=\"https:\/\/www.opentone.co.jp\/optonlabos\/wp-content\/uploads\/sites\/11\/2021\/02\/MapReduce-1.gif\" alt=\"\" class=\"wp-image-461\" \/><\/figure><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u304c\u300cHadoop\u300d\u3092\u5b66\u7fd2\u3059\u308b\u3046\u3048\u3067\u306e\u57fa\u790e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u7406\u89e3\u306b\u306a\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002<br>\u3082\u3061\u308d\u3093\u3053\u308c\u4ee5\u5916\u306b\u3082\u5f15\u304d\u3064\u3065\u304d\u62bc\u3055\u3048\u3066\u304a\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044Hadoop\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u3084\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u6b21\u56de\u306f\u30ed\u30fc\u30ab\u30eb\u30de\u30b7\u30f3\u306b\u300cHadoop\u300d\u74b0\u5883\u3092\u69cb\u7bc9\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<div class=\"opent-_2\" style=\"margin-top: 10px;margin-right: 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