{"id":1712,"date":"2018-10-09T15:19:57","date_gmt":"2018-10-09T07:19:57","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=1712"},"modified":"2018-10-09T15:19:57","modified_gmt":"2018-10-09T07:19:57","slug":"1tb%ef%bc%88%e6%88%961%e5%88%86%e9%92%9f%ef%bc%89%e6%8e%92%e5%ba%8f%e7%9a%84%e5%86%a0%e5%86%9b","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/1712","title":{"rendered":"1TB\uff08\u62161\u5206\u949f\uff09\u6392\u5e8f\u7684\u51a0\u519b"},"content":{"rendered":"
\n
\n
\n

1TB\uff08\u62161\u5206\u949f\uff09\u6392\u5e8f\u7684\u51a0\u519b<\/h1>\n<\/div>\n
\n
2016\u5e7405\u670816\u65e5 10:50:33<\/span>\u00a0\u5c0f\u767d\u7684\u5b66\u4e60\u7b14\u8bb0<\/a>\u00a0\u9605\u8bfb\u6570\uff1a577<\/span>\u66f4\u591a<\/span><\/p>\n
\u4e2a\u4eba\u5206\u7c7b\uff1a<\/span>\u00a0MapReduce\/Hadoop<\/a><\/div>\n<\/div>\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\u4f5c\u4e3a\u5206\u5e03\u5f0f\u6570\u636e\u5904\u7406\u7684\u6846\u67b6\uff0c\u96c6\u7fa4\u7684\u6570\u636e\u5904\u7406\u80fd\u529b\u7a76\u7adf\u6709\u591a\u5feb\uff1f\u6216\u8bb81TB\u6392\u5e8f\u53ef\u4ee5\u4f5c\u4e3a\u8861\u91cf\u7684\u6807\u51c6\u4e4b\u4e00\u3002<\/p>\n

1TB\u6392\u5e8f\uff0c\u5c31\u662f\u5bf91TB\uff081024GB\uff0c\u5927\u7ea6100\u4ebf\u884c\u6570\u636e\uff09\u7684\u6570\u636e\u8fdb\u884c\u6392\u5e8f\u30022008\u5e74\uff0cHadoop\u8d62\u5f971TB\u6392\u5e8f\u57fa\u51c6\u8bc4\u4f30\u7b2c\u4e00\u540d<\/a>\uff0c\u6392\u5e8f1TB\u6570\u636e\u8017\u65f6209\u79d2\u3002\u540e\u6765\uff0c1TB\u6392\u5e8f\u88ab1\u5206\u949f\u6392\u5e8f\u6240\u53d6\u4ee3<\/a>\uff0c1\u5206\u949f\u6392\u5e8f\u6307\u7684\u662f\u5728\u4e00\u5206\u949f\u5185\u5c3d\u53ef\u80fd\u591a\u7684\u6392\u5e8f\u30022009\u5e74\uff0c\u5728\u4e00\u4e2a1406\u4e2a\u8282\u70b9\u7ec4\u6210\u7684hadoop\u96c6\u7fa4\uff0c\u572859\u79d2\u91cc\u5bf9500GB\u5b8c\u6210\u4e86\u6392\u5e8f\uff1b\u800c\u57281460\u4e2a\u8282\u70b9\u7684\u96c6\u7fa4\uff0c\u6392\u5e8f1TB\u6570\u636e\u53ea\u82b1\u4e8662\u79d2<\/a>\u3002<\/p>\n

\u8fd9\u4e48\u60ca\u4eba\u7684\u6570\u636e\u5904\u7406\u80fd\u529b\uff0c\u662f\u4e0d\u662f\u8ba9\u4f60\u5370\u8c61\u6df1\u523b\u5462\uff1f\u5475\u5475<\/p>\n

\u4e0b\u9762\u6211\u4eec\u6765\u770b\u770b\u6392\u5e8f\u7684\u8fc7\u7a0b\u5427\u3002<\/p>\n

2\u3001\u6392\u5e8f\u7684\u8fc7\u7a0b<\/strong><\/p>\n

1TB\u7684\u6570\u636e\uff1f100\u4ebf\u6761\u6570\u636e\uff1f\u90fd\u662f\u4ec0\u4e48\u6837\u7684\u6570\u636e\u5462\uff1f\u8ba9\u6211\u4eec\u6765\u770b\u51e0\u6761\uff1a<\/p>\n

\n
\n
\"\"<\/a><\/div>\n<\/div>\n
    \n
  1. .t^#\\|v$2<\/span>\\\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00AAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEFFFFFFFFFFGGGGGGGGGGHHHHHHHH<\/li>\n
  2. 75<\/span>@~?’WdUF\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01IIIIIIIIIIJJJJJJJJJJKKKKKKKKKKLLLLLLLLLLMMMMMMMMMMNNNNNNNNNNOOOOOOOOOOPPPPPPPP<\/li>\n
  3. w[o||:N&H,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02QQQQQQQQQQRRRRRRRRRRSSSSSSSSSSTTTTTTTTTTUUUUUUUUUUVVVVVVVVVVWWWWWWWWWWXXXXXXXX<\/li>\n
  4. ^Eu)<n#kdP\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a03YYYYYYYYYYZZZZZZZZZZAAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEFFFFFFFF<\/li>\n
  5. +l-$$OE\/ZH\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a04GGGGGGGGGGHHHHHHHHHHIIIIIIIIIIJJJJJJJJJJKKKKKKKKKKLLLLLLLLLLMMMMMMMMMMNNNNNNNN<\/li>\n
  6. LsS8)|.ZLD\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a05OOOOOOOOOOPPPPPPPPPPQQQQQQQQQQRRRRRRRRRRSSSSSSSSSSTTTTTTTTTTUUUUUUUUUUVVVVVVVV<\/li>\n
  7. le5awB.$sm\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a06WWWWWWWWWWXXXXXXXXXXYYYYYYYYYYZZZZZZZZZZAAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDD<\/li>\n
  8. q__[fwhKFg\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a07EEEEEEEEEEFFFFFFFFFFGGGGGGGGGGHHHHHHHHHHIIIIIIIIIIJJJJJJJJJJKKKKKKKKKKLLLLLLLL<\/li>\n
  9. ;L+!2rT~hd\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a08MMMMMMMMMMNNNNNNNNNNOOOOOOOOOOPPPPPPPPPPQQQQQQQQQQRRRRRRRRRRSSSSSSSSSSTTTTTTTT<\/li>\n
  10. M^*dDE;6<\/span>^<\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a09UUUUUUUUUUVVVVVVVVVVWWWWWWWWWWXXXXXXXXXXYYYYYYYYYYZZZZZZZZZZAAAAAAAAAABBBBBBBB<\/li>\n<\/ol>\n<\/div>\n

    \u63cf\u8ff0\u4e00\u4e0b\uff1a\u6bcf\u4e00\u884c\uff0c\u662f\u4e00\u6761\u6570\u636e\u3002\u6bcf\u4e00\u6761\uff0c\u75312\u90e8\u5206\u7ec4\u6210\uff0c\u524d\u9762\u662f\u4e00\u4e2a\u753110\u4e2a\u968f\u5373\u5b57\u7b26\u7ec4\u6210\u7684key\uff0c\u540e\u9762\u662f\u4e00\u4e2a80\u4e2a\u5b57\u7b26\u7ec4\u6210\u7684value\u3002<\/p>\n

    \u6392\u5e8f\u7684\u4efb\u52a1\uff1a\u6309\u7167key\u7684\u987a\u5e8f\u6392\u3002<\/p>\n

    \u90a3\u4e481TB\u7684\u6570\u636e\u4ece\u4f55\u800c\u6765\uff1f\u7b54\u6848\u662f\u7528\u7a0b\u5e8f\u968f\u5373\u751f\u6210\u7684\uff0c\u7528\u4e00\u4e2a\u53ea\u6709map\uff0c\u6ca1\u6709reduce\u7684MapReduce job\uff0c\u5728\u6574\u4e2a\u96c6\u7fa4\u4e0a\u5148\u968f\u5373\u751f\u6210100\u4ebf\u884c\u6570\u636e\u3002\u7136\u540e\uff0c\u5728\u8fd9\u4e2a\u57fa\u7840\u4e0a\uff0c\u518d\u8fd0\u884c\u6392\u5e8f\u7684MapReduce job\uff0c\u4ee5\u6d4b\u8bd5\u96c6\u7fa4\u6392\u5e8f\u6027\u80fd\u3002<\/p>\n

    3\u3001\u6392\u5e8f\u7684\u539f\u7406<\/strong><\/p>\n

    \u5148\u8bf4\u660e\u4e00\u70b9\uff0c\u719f\u6089MapReduce\u7684\u4eba\u90fd\u77e5\u9053\uff1a\u6392\u5e8f\u662fMapReduce\u7684\u5929\u7136\u7279\u6027\uff01\u5728\u6570\u636e\u8fbe\u5230reducer\u4e4b\u524d\uff0cmapreduce\u6846\u67b6\u5df2\u7ecf\u5bf9\u8fd9\u4e9b\u6570\u636e\u6309\u952e\u6392\u5e8f\u4e86\u3002<\/p>\n

    \u6240\u4ee5\uff0c\u5728\u8fd9\u4e2a\u6392\u5e8f\u7684job\u91cc\uff0c\u4e0d\u9700\u8981\u7279\u6b8a\u7684Mapper\u548cReducer\u7c7b\u3002\u7528\u9ed8\u8ba4\u7684
    \nIdentityMapper\u548cIdentityReducer\u5373\u53ef\u3002<\/p>\n

    \u65e2\u7136\u6392\u5e8f\u662f\u5929\u7136\u7279\u6027\uff0c\u90a3\u4e481TB\u6392\u5e8f\u7684\u96be\u70b9\u5728\u54ea\u91cc\u5462\uff1f\uff1f\u7b54\uff1a100\u4ebf\u884c\u7684\u6570\u636e\u968f\u5373\u5206\u6563\u57281000\u591a\u53f0\u673a\u5668\u4e0a\uff0cmapper\u548creducer\u90fd\u662fIdentity\u7684\uff0c\u8fd9\u4e2a\u96be\u70b9\u5c31\u5728MapReduce\u7684shuffle\u9636\u6bb5\uff01\u5173\u952e\u5728\u5982\u4f55\u53d6\u6837\u548c\u600e\u4e48\u5199Partitioner\u3002<\/p>\n

    \u597d\u5728\u8fd9\u4e2a\u6392\u5e8f\u7684\u6e90\u4ee3\u7801\u5df2\u8fd1\u5305\u542b\u5728hadoop\u7684examples\u91cc\u4e86\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u5206\u6790\u4e00\u4e0b\u3002<\/p>\n

    4\u3001\u53d6\u6837\u548cpartition\u7684\u8fc7\u7a0b<\/strong><\/p>\n

    \u9762\u5bf9\u5bf9\u8fd9\u4e48\u5927\u91cf\u7684\u6570\u636e\uff0c\u4e3a\u4e86partition\u7684\u66f4\u5747\u5300\u3002\u8981\u5148\u201c\u53d6\u6837\u201d\uff1a<\/p>\n

    1) \u5bf9Math.min(10, splits.length)\u4e2asplit\uff08\u8f93\u5165\u5206\u7247\uff09\u8fdb\u884c\u968f\u673a\u53d6\u6837\uff0c\u5bf9\u6bcf\u4e2asplit\u53d610000\u4e2a\u6837\uff0c\u603b\u517110\u4e07\u4e2a\u6837
    \n2) 10\u4e07\u4e2a\u6837\u6392\u5e8f\uff0c\u6839\u636ereducer\u7684\u6570\u91cf(n)\uff0c\u53d6\u51fa\u95f4\u9694\u5e73\u5747\u7684n-1\u4e2a\u6837
    \n3) \u5c06\u8fd9\u4e2an-1\u4e2a\u6837\u5199\u5165partitionFile(_partition.lst\uff0c\u662f\u4e00\u4e2aSequenceFile)\uff0ckey\u662f\u53d6\u7684\u6837\uff0c\u503c\u662fnullValue
    \n4) \u5c06partitionFile\u5199\u5165DistributedCache<\/p>\n

    \u63a5\u4e0b\u6765\uff0c\u6b63\u5f0f\u5f00\u59cb\u6267\u884cMapReduce job\uff1a
    \n5) \u6bcf\u4e2amap\u8282\u70b9\uff1a
    \na.\u6839\u636en-1\u4e2a\u6837\uff0cbuild\u4e00\u68f5\u7c7b\u4f3c\u4e8eB-\u6570\u7684\u201c\u7d22\u5f15\u6811\u201d\uff1a
    \n* \u6bcf\u4e2a\u975e\u53f6\u5b50\u8282\u70b9\uff0c\u90fd\u6709256\u4e2a\u5b50\u8282\u70b9\u3002
    \n* \u4e0d\u7b97\u6839\u8282\u70b9\u7684\u975e\u53f6\u5b50\u8282\u70b9\u67091\u5c42\uff0c\u52a0\u4e0a\u6839\u8282\u70b9\u548c\u53f6\u5b50\u8282\u70b9\uff0c\u51713\u5c42\u3002
    \n* \u975e\u53f6\u5b50\u8282\u70b9\u4ee3\u8868key\u7684\u201cbyte path\u201d
    \n* \u6bcf\u4e2a\u53f6\u5b50\u8282\u70b9\u4ee3\u8868key\u7684\u524d2\u4e2abytes path
    \n* \u53f6\u5b50\u8282\u70b9\u4e0a\uff0c\u4fdd\u5b58\u7684\u662fpartition number\u7684\u8303\u56f4\uff0c\u6709\u591a\u5c11\u4e2areducer\u5c31\u6709\u591a\u5c11partition number<\/p>\n

    b.\u524d\u7f00\u76f8\u540c\u7684key\uff0c\u88ab\u5206\u914d\u5230\u540c\u4e00\u4e2a\u53f6\u5b50\u8282\u70b9\u3002
    \nc.\u4e00\u4e2a\u5b50\u8282\u70b9\u4e0a\uff0c\u53ef\u80fd\u6709\u591a\u4e2areducer
    \nd.\u6bd4\u7b2ci\u4e2a\u6837\u5c0f\u7684key\uff0c\u88ab\u5206\u914d\u5230\u7b2ci\u4e2areducer\uff0c\u5269\u4e0b\u7684\u88ab\u5206\u914d\u5230\u6700\u540e\u4e00\u4e2areducer\u3002<\/p>\n

    6) \u9488\u5bf9\u4e00\u4e2akey\uff0cpartition\u7684\u8fc7\u7a0b\uff1a<\/p>\n

    a. \u9996\u9009\u5224\u65adkey\u7684\u7b2c1\u4e2abyte\uff0c\u627e\u5230\u7b2c1\u5c42\u975e\u53f6\u5b50\u8282\u70b9
    \nb. \u518d\u6839\u636ekey\u7684\u7b2c2\u4e2abyte\uff0c\u53f6\u5b50\u8282\u70b9
    \nc. \u6bcf\u4e2a\u53f6\u5b50\u8282\u70b9\u53ef\u80fd\u5bf9\u5e94\u591a\u4e2a\u53d6\u6837(\u5373\u591a\u4e2areducer)\uff0c\u518d\u9010\u4e2a\u548c\u6bcf\u4e2a\u6837\u6bd4\u8f83\uff0c\u786e\u5b9a\u5206\u914d\u7ed9\u54ea\u4e00\u4e2areducer<\/p>\n

    5\u3001\u56fe\u89e3partition\u7684\u201c\u7d22\u5f15\u6811\u201d<\/strong><\/p>\n

    \u5bf9\u4e0a\u9762\u7684\u6587\u5b57\u63cf\u8ff0\u53ef\u80fd\u6bd4\u8f83\u96be\u7406\u89e3\uff0cetongg<\/a>\u00a0\u540c\u5b66\u5efa\u8bae\u6211\u753b\u4e2a\u56fe\u3002\u6240\u6709\u624d\u6709\u4e86\u4e0b\u9762\u8fd9\u4e9b\u6587\u5b57\u3002\u611f\u8c22etongg\u548c\u5927\u5bb6\u5bf9\u672c\u5e16\u7684\u5173\u6ce8\u3002<\/p>\n

    \u201c\u7d22\u5f15\u6811\u201d\u7684\u4f5c\u7528\u662f\u4e3a\u4e86\u8ba9key\u5feb\u901f\u627e\u5230\u5bf9\u5e94\u7684reducer\u3002\u4e0b\u56fe\u662f\u6211\u753b\u7684\u7d22\u5f15\u6811\u793a\u610f\u56fe\uff1a<\/p>\n

    \"\"<\/p>\n

    \u5bf9\u4e0a\u9762\u7684\u56fe\u505a\u4e00\u70b9\u89e3\u91ca\uff1a
    \n1\u3001\u4e3a\u4e86\u7b80\u5355\uff0c\u6211\u53ea\u753b\u4e86A\u3001B\u3001C\u4e09\u4e2a\u8282\u70b9\uff0c\u5b9e\u9645\u7684\u662f\u6709256\u4e2a\u8282\u70b9\u7684\u3002
    \n2\u3001\u8fd9\u4e2a\u56fe\u5047\u8bbe\u670920\u4e2areducer\uff08\u4e0b\u68070\u523019\uff09\uff0c\u90a3\u4e48\u6211\u4eec\u6700\u7ec8\u83b7\u5f97n-1\u4e2a\u6837\uff0c\u537319\u4e2a\u6837\uff08\u4e0b\u6807\u4e3a18\u7684\u4e3a\u6700\u540e\u4e00\u4e2a\u6837\uff09
    \n3\u3001\u56fe\u4e2d\u7684\u5706\u5708\uff0c\u4ee3\u8868\u7d22\u5f15\u6811\u4e0a\u7684\u8282\u70b9\uff0c\u7d22\u5f15\u6811\u51713\u5c42\u3002
    \n4\u3001\u53f6\u5b50\u8282\u70b9\u4e0b\u9762\u7684\u957f\u65b9\u5f62\u4ee3\u8868\u53d6\u6837\u6570\u7ec4\u3002\u7ea2\u8272\u7684\u6570\u5b57\u4ee3\u8868\u53d6\u6837\u7684\u4e0b\u6807\u3002
    \n5\u3001\u6bcf\u4e2a\u8282\u70b9\u90fd\u5bf9\u5e94\u53d6\u6837\u6570\u7ec4\u4e0a\u7684\u4e00\u4e2a\u4e0b\u6807\u8303\u56f4\uff08\u66f4\u51c6\u5907\u7684\u8bf4\uff0c\u662f\u5bf9\u5e94\u4e00\u4e2apartition number\u7684\u8303\u56f4\uff0c\u6bcf\u4e2apartition number\u4ee3\u8868\u4e00\u4e2areducer\uff09\u3002\u8fd9\u4e2a\u8303\u56f4\u5728\u9014\u4e2d\u7528\u84dd\u8272\u7684\u6587\u5b57\u6807\u8bc6\u3002<\/p>\n

    \u524d\u9762\u6587\u4e2d\u6709\u4e00\u53e5\u8bdd\uff1a
    \n\u6bd4\u7b2ci\u4e2a\u6837\u5c0f\u7684key\uff0c\u88ab\u5206\u914d\u5230\u7b2ci\u4e2areducer\uff0c\u5269\u4e0b\u7684\u88ab\u5206\u914d\u5230\u6700\u540e\u4e00\u4e2areducer<\/p>\n

    \u8fd9\u91cc\u505a\u4e00\u4e2a\u5c0f\u5c0f\u7684\u7ea0\u6b63\uff0c\u5e94\u8be5\u662f\uff1a
    \n\u5c0f\u4e8e\u6216\u8005\u7b49\u4e8e\u7b2ci\u4e2a\u6837\u7684key\uff0c\u88ab\u5206\u914d\u5230\u7b2ci\u4e2areducer\uff0c\u5269\u4e0b\u7684\u88ab\u5206\u914d\u5230\u6700\u540e\u4e00\u4e2areducer\u3002<\/strong><\/p>\n

    \u4e0b\u9762\u5f00\u59cbpartition\uff1a
    \n\u5982\u679ckey\u4ee5”AAA”\u5f00\u5934\uff0c\u88ab\u5206\u914d\u5230\u7b2c\u201c0\u201d\u4e2areducer\u3002
    \n\u5982\u679ckey\u4ee5”ACA”\u5f00\u5934\uff0c\u88ab\u5206\u914d\u5230\u7b2c\u201c4\u201d\u4e2areducer\u3002
    \n\u5982\u679ckey\u4ee5”ACD”\u5f00\u5934\uff0c\u88ab\u5206\u914d\u5230\u7b2c\u201c4\u201d\u4e2areducer\u3002
    \n\u5982\u679ckey\u4ee5”ACF”\u5f00\u5934\uff0c\u88ab\u5206\u914d\u5230\u7b2c\u201c5\u201d\u4e2areducer\u3002<\/p>\n

    \u90a3\u4e48\uff0c
    \n\u5982\u679ckey\u4ee5”ACZ”\u5f00\u5934\uff0c\u88ab\u5206\u914d\u5230\u7b2c\u51e0\u4e2areducer\uff1f\uff1f
    \n\u7b54\u6848\u662f\uff1a\u88ab\u5206\u914d\u5230\u7b2c\u201c6\u201d\u4e2areducer\u3002<\/p>\n

    \u540c\u7406\uff0c
    \n\u5982\u679ckey\u4ee5”CCZ”\u5f00\u5934\uff0c\u88ab\u5206\u914d\u5230\u7b2c\u201c19\u201d\u4e2areducer\uff0c\u4e5f\u5c31\u662f\u6700\u540e\u4e00\u4e2areducer\u3002<\/p>\n

    6\u3001\u4e3a\u4ec0\u4e48\u4e0d\u7528HashPartitioner\uff1f<\/strong><\/p>\n

    \u8fd8\u9700\u8981\u518d\u8bf4\u660e\u7684\u4e00\u70b9\uff1a
    \n\u4e0a\u9762\u81ea\u5b9a\u4e49\u7684Partitinoner\u7684\u4f5c\u7528\u9664\u4e86\u5feb\u901f\u627e\u5230key\u5bf9\u5e94\u7684reducer\uff0c\u66f4\u91cd\u8981\u7684\u4e00\u70b9\u662f\uff1a\u8fd9\u4e2aPartitioner\u63a7\u5236\u4e86\u6392\u5e8f\u7684\u603b\u4f53\u6709\u5e8f\uff01<\/p>\n

    \u4e0a\u6587\u4e2d\u63d0\u5230\u7684\u201c\u6392\u5e8f\u662fMapReduce\u7684\u5929\u7136\u7279\u6027\uff01\u201d\u8fd9\u53e5\u8bdd\u6709\u70b9\u8ff7\u60d1\u6027\u3002\u66f4\u51c6\u786e\u7684\u8bf4\uff0c\u8fd9\u4e2a\u201c\u5929\u7136\u7279\u6027\u201d\u53ea\u4fdd\u8bc1\u4e86\uff1aa) \u6bcf\u4e2amap\u7684\u8f93\u51fa\u7ed3\u679c\u662f\u6709\u5e8f\u7684\uff1b b) \u6bcf\u4e2areduce\u7684\u8f93\u5165\u662f\u6709\u5e8f\u7684\uff08\u53c2\u8003\u4e0b\u9762\u7684\u56fe\uff09\u3002\u800c1TB\u7684\u6574\u4f53\u6709\u5e8f\u8fd8\u9700\u8981\u9760Partitioner\u7684\u5e2e\u52a9\uff01<\/p>\n

    Partitioner\u63a7\u5236\u4e86\u76f8\u4f3c\u7684key(\u5373\u524d\u7f00\u76f8\u540c)\u843d\u5728\u540c\u4e00\u4e2areducer\u91cc\uff0c\u7136\u540emapreduce\u7684\u201c\u5929\u7136\u7279\u6027\u201d\u518d\u4fdd\u8bc1\u6bcf\u4e2areducer\u7684\u8f93\u5165\uff08\u5728\u6b63\u5f0f\u6267\u884creduce\u51fd\u6570\u524d\uff0c\u6709\u4e00\u4e2a\u6392\u5e8f\u7684\u52a8\u4f5c\uff09\u662f\u6709\u5e8f\u7684\uff01<\/p>\n

    \u8fd9\u6837\u5c31\u7406\u89e3\u4e86\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u7528HashPartitioiner\u4e86\u3002\u56e0\u4e3a\u81ea\u5b9a\u4e49\u7684Partitioner\u8981\u4fdd\u8bc1\u6392\u5e8f\u7684\u201c\u6574\u4f53\u6709\u5e8f\u201d\u5927\u65b9\u5411\u3002<\/p>\n

    \u53e6\u5916\uff0c\u63a8\u8350\u4e00\u7bc7\u5173\u4e8epartitioner\u535a\u6587\uff1aHadoop Tutorial Series, Issue #2: Getting Started With (Customized) Partitioning<\/a><\/p>\n

    \u518d\u8d34\u300aHadoop.The.Definitive.Guide\u300b\u4e2d\u4e00\u5f20\u56fe\uff0c\u66f4\u6709\u5229\u4e8e\u7406\u89e3\u4e86\uff1a
    \n\"\"<\/p>\n

    <\/div>\n
    \u53c2\u8003\uff1a\u539f\u6587\u00a0http:\/\/www.iteye.com\/topic\/709986<\/a><\/div>\n
    http:\/\/blog.sina.com.cn\/s\/blog_d76227260101d948.html<\/a><\/div>\n
    http:\/\/hugh-wangp.iteye.com\/blog\/1491175<\/a><\/div>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"

    1TB\uff08\u62161\u5206\u949f\uff09\u6392\u5e8f\u7684\u51a0\u519b 2016\u5e74<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[24],"tags":[121],"class_list":["post-1712","post","type-post","status-publish","format-standard","hentry","category-value_docs","tag-05-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1712","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=1712"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1712\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=1712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=1712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=1712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}