{"id":29649,"date":"2023-10-03T01:56:22","date_gmt":"2023-05-14T09:15:41","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8%e6%82%a8%e7%9a%84windows%e4%b8%aa%e4%ba%ba%e8%ae%a1%e7%ae%97%e6%9c%ba%e4%b8%8a%ef%bc%8c%e4%bd%93%e9%aa%8c%e5%9f%ba%e4%ba%8emongodb%e7%9a%84mapreduce%e5%8a%9f%e8%83%bd%e5%8f%aa%e9%9c%8015\/"},"modified":"2025-08-12T15:11:12","modified_gmt":"2025-08-12T07:11:12","slug":"%e5%9c%a8%e6%82%a8%e7%9a%84windows%e4%b8%aa%e4%ba%ba%e8%ae%a1%e7%ae%97%e6%9c%ba%e4%b8%8a%ef%bc%8c%e4%bd%93%e9%aa%8c%e5%9f%ba%e4%ba%8emongodb%e7%9a%84mapreduce%e5%8a%9f%e8%83%bd%e5%8f%aa%e9%9c%8015","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8%e6%82%a8%e7%9a%84windows%e4%b8%aa%e4%ba%ba%e8%ae%a1%e7%ae%97%e6%9c%ba%e4%b8%8a%ef%bc%8c%e4%bd%93%e9%aa%8c%e5%9f%ba%e4%ba%8emongodb%e7%9a%84mapreduce%e5%8a%9f%e8%83%bd%e5%8f%aa%e9%9c%8015\/","title":{"rendered":"\u5728\u60a8\u7684Windows\u4e2a\u4eba\u8ba1\u7b97\u673a\u4e0a\uff0c\u4f53\u9a8c\u57fa\u4e8eMongoDB\u7684MapReduce\u529f\u80fd\u53ea\u970015\u5206\u949f"},"content":{"rendered":"

\u8fd9\u7bc7\u6587\u7ae0\u662f\u4e3a\u90a3\u4e9b\u6ca1\u6709\u592a\u591a\u65f6\u95f4\u4f46\u60f3\u8981\u5feb\u901f\u4e86\u89e3\u65b0\u6280\u672f\u7684\u4eba\u6240\u8bbe\u8ba1\u7684\u3002
\n\u5b83\u7684\u76ee\u6807\u662f\u8ba9\u8bfb\u8005\u5728\u4ec5\u4ec5\u4f7f\u7528\u81ea\u5df1\u7684\u4e2a\u4eba\u7535\u8111\u5b89\u88c5MongoDB\u7684MapReduce\uff0c\u5e76\u572815\u5206\u949f\u5185\u4f53\u9a8c\u4e00\u756a\u3002<\/p>\n

\u30b4\u30fc\u30eb\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306bMapReduce\u306e\u7d50\u679c\u3092\u8868\u793a\u3057\u307e\u3059\u3002
\n\u52d5\u7269\u306e\u7a2e\u985e\u3054\u3068\u306e\u96c6\u8a08\u5024\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
{<\/span>\r\n        \"<\/span>results<\/span>\"<\/span> :<\/span> [<\/span>\r\n                {<\/span>\r\n                        \"<\/span>_id<\/span>\"<\/span> :<\/span> \"<\/span>cheetah<\/span>\"<\/span>,<\/span>\r\n                        \"<\/span>value<\/span>\"<\/span> :<\/span> {<\/span>\r\n                                \"<\/span>count<\/span>\"<\/span> :<\/span> 10<\/span>\r\n                        }<\/span>\r\n                },<\/span>\r\n                {<\/span>\r\n                        \"<\/span>_id<\/span>\"<\/span> :<\/span> \"<\/span>turtle<\/span>\"<\/span>,<\/span>\r\n                        \"<\/span>value<\/span>\"<\/span> :<\/span> {<\/span>\r\n                                \"<\/span>count<\/span>\"<\/span> :<\/span> 10<\/span>\r\n                        }<\/span>\r\n                },<\/span>\r\n                {<\/span>\r\n                        \"<\/span>_id<\/span>\"<\/span> :<\/span> \"<\/span>zebra<\/span>\"<\/span>,<\/span>\r\n                        \"<\/span>value<\/span>\"<\/span> :<\/span> {<\/span>\r\n                                \"<\/span>count<\/span>\"<\/span> :<\/span> 10<\/span>\r\n                        }<\/span>\r\n                }<\/span>\r\n        ],<\/span>\r\n        \"<\/span>timeMillis<\/span>\"<\/span> :<\/span> 22<\/span>,<\/span>\r\n        \"<\/span>counts<\/span>\"<\/span> :<\/span> {<\/span>\r\n                \"<\/span>input<\/span>\"<\/span> :<\/span> 30<\/span>,<\/span>\r\n                \"<\/span>emit<\/span>\"<\/span> :<\/span> 30<\/span>,<\/span>\r\n                \"<\/span>reduce<\/span>\"<\/span> :<\/span> 3<\/span>,<\/span>\r\n                \"<\/span>output<\/span>\"<\/span> :<\/span> 3<\/span>\r\n        },<\/span>\r\n        \"<\/span>ok<\/span>\"<\/span> :<\/span> 1<\/span>\r\n}<\/span>\r\n><\/span>\r\n<\/code><\/pre>\n
\u73af\u5883\u30fb\u64cd\u4f5c\u7cfb\u7edf\uff1aWindows10 \u4e13\u4e1a\u7248\uff081803\uff09x64\uff08\u65e5\u8bed\u7248\uff09
\n\u30fbMongoDB\uff1a\u7248\u672c 4.0.0<\/p>\n
\u4f5c\u4e1a\u7684\u6b65\u9aa4<\/p>\n
    \n
  1. \n
      \u521b\u5efa\u4efb\u52a1\u6587\u4ef6\u5939<\/ol>\n<\/li>\n<\/ol>\n
       <\/p>\n
        \n
      1. \n
          \u5b89\u88c5MongoDB<\/ol>\n<\/li>\n<\/ol>\n
           <\/p>\n
            \n
          1. \n
              \u6570\u636e\u5bfc\u5165<\/ol>\n<\/li>\n<\/ol>\n
               <\/p>\n
                \u6267\u884cMapReduce\u64cd\u4f5c<\/ol>\n
                \u521b\u5efa\u4f5c\u4e1a\u6587\u4ef6\u5939\u63a5\u4e0b\u6765\uff0c\u5c06\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u4e0b\u8f7d\u6587\u4ef6\u548c\u5176\u4ed6\u64cd\u4f5c\u7684\u5de5\u4f5c\u6587\u4ef6\u5939\u3002\u867d\u7136\u8fd9\u9879\u5de5\u4f5c\u4e0d\u662f\u5fc5\u9700\u7684\uff0c\u4f46\u4ece\u4fe1\u606f\u6574\u7406\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u6211\u8ba4\u4e3a\u6700\u597d\u8fd8\u662f\u505a\u4e00\u4e0b\u3002<\/p>\n
                C:\\sandbox\\MongoDBMapReduce\r\n<\/code><\/pre>\n
                \u5f15\u5165MongoDB<\/p>\n
                \u4e0b\u8f7d\u8bf7\u5728MongoDB\u7684\u4e0b\u8f7d\u7f51\u7ad9\u4e0a\u9009\u62e9\u4ee5\u4e0b\u9009\u9879\uff0c\u5c06\u201cmongodb-win32-x86_64-2008plus-ssl-4.0.0-signed.msi\u201d\u4e0b\u8f7d\u5230\u5de5\u4f5c\u6587\u4ef6\u5939\u4e2d\u3002
                \n– \u7248\u672c\uff1aWindows 64\u4f4d x64
                \n– \u5b89\u88c5\u5305\uff1a\u4e0b\u8f7d\uff08msi\uff09<\/p>\n
                \"image.png\"<\/p>\n
                \u5b89\u88c5\u53cc\u51fb\u4e0b\u8f7d\u7684”mongodb-win32-x86_64-2008plus-ssl-4.0.0-signed.msi”\u8fdb\u884c\u6267\u884c\u3002<\/p>\n
                \"image.png\"\u9009\u62e9\u9ed8\u8ba4\u7684”\u4e0b\u4e00\u6b65”\u6309\u94ae\u3002<\/p>\n
                \"image.png\"\u4ee5\u540e\uff0c\u6240\u6709\u5185\u5bb9\u90fd\u5c06\u9ed8\u8ba4\u4e00\u76f4\u8fdb\u884c\u5230\u6700\u540e\u3002<\/p>\n
                \u521b\u5efa\u6587\u4ef6\u5939\u521b\u5efa\u4ee5\u4e0b\u6587\u4ef6\u5939\u3002<\/p>\n
                C:\\sandbox\\MongoDBMapReduce\\data\r\nC:\\sandbox\\MongoDBMapReduce\\data\\db\r\nC:\\sandbox\\MongoDBMapReduce\\data\\log\r\n<\/code><\/pre>\n
                \u521b\u5efa\u914d\u7f6e\u6587\u4ef6\uff08mongod.cfg\uff09\u3002
                \n\u4fee\u590d\u4ee5\u4e0b\u5df2\u5b89\u88c5\u7684\u6587\u4ef6\u3002<\/p>\n
                C:\\Program Files\\MongoDB\\Server\\3.2\\mongod.cfg\r\n<\/code><\/pre>\n
                \u8bf7\u6839\u636e\u9700\u8981\u5c06\u539f\u59cb\u6587\u4ef6\u590d\u5236\u4e00\u4efd\u3002<\/p>\n
                \u6211\u5011\u5c07\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u9032\u884c\u66f4\u6539\u3002<\/p>\n
                systemLog<\/span>:<\/span>\r\n    destination<\/span>:<\/span> file<\/span>\r\n    path<\/span>:<\/span> c:\\data\\log\\mongod.log<\/span>\r\nstorage<\/span>:<\/span>\r\n    dbPath<\/span>:<\/span> c:\\data\\db<\/span>\r\n<\/code><\/pre>\n
                systemLog<\/span>:<\/span>\r\n    destination<\/span>:<\/span> file<\/span>\r\n    path<\/span>:<\/span> C:\\sandbox\\MongoDBMapReduce\\data\\log\\mongod.log<\/span>\r\nstorage<\/span>:<\/span>\r\n    dbPath<\/span>:<\/span> C:\\sandbox\\MongoDBMapReduce\\data\\db<\/span>\r\n<\/code><\/pre>\n
                \u8fd0\u884cmongod\u5728\u547d\u4ee4\u63d0\u793a\u7b26\u4e2d\uff0c\u8f6c\u5230\u5b89\u88c5\u7684MongoDB\u7684bin\u6587\u4ef6\u5939\uff0c\u5e76\u6267\u884cmongod\u547d\u4ee4\u3002<\/p>\n
                cd C:\\Program Files\\MongoDB\\Server\\3.2\\bin\r\nmongod\r\n<\/code><\/pre>\n
                \u8f93\u51fa\u5982\u4e0b\uff0c\u5e76\u542f\u52a8mongod\u3002<\/p>\n
                C:\\Program Files\\MongoDB\\Server\\3.2\\bin>mongod\r\n2018-08-01T12:24:19.271+0900 I CONTROL  [initandlisten] MongoDB starting : pid=13848 port=27017 dbpath=C:\\data\\db\\ 64-bit host=49-OT0087-4\r\n2018-08-01T12:24:19.273+0900 I CONTROL  [initandlisten] targetMinOS: Windows 7\/Windows Server 2008 R2\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten] db version v3.2.10\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten] git version: 79d9b3ab5ce20f51c272b4411202710a082d0317\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.1t-fips  3 May 2016\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten] allocator: tcmalloc\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten] modules: none\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten] build environment:\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten]     distmod: 2008plus-ssl\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten]     distarch: x86_64\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten]     target_arch: x86_64\r\n2018-08-01T12:24:19.274+0900 I CONTROL  [initandlisten] options: {}\r\n2018-08-01T12:24:19.293+0900 I -        [initandlisten] Detected data files in C:\\data\\db\\ created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.\r\n2018-08-01T12:24:19.295+0900 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=8G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),\r\n2018-08-01T12:24:20.333+0900 I NETWORK  [HostnameCanonicalizationWorker] Starting hostname canonicalization worker\r\n2018-08-01T12:24:20.333+0900 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory 'C:\/data\/db\/diagnostic.data'\r\n2018-08-01T12:24:20.363+0900 I NETWORK  [initandlisten] waiting for connections on port 27017\r\n<\/code><\/pre>\n
                \u786e\u8ba4MongoDB shell\u662f\u5426\u6b63\u5728\u8fd0\u884c\u3002\u5728\u53e6\u4e00\u4e2a\u547d\u4ee4\u63d0\u793a\u7b26\u4e2d\uff0c\u8fdb\u5165\u5b89\u88c5\u7684MongoDB\u7684bin\u6587\u4ef6\u5939\uff0c\u5e76\u6267\u884cmongo\u547d\u4ee4\u3002<\/p>\n
                cd C:\\Program Files\\MongoDB\\Server\\3.2\\bin\r\nmongo\r\n<\/code><\/pre>\n
                \u4ee5\u4e0b\u5c06\u4ee5\u5982\u4e0b\u65b9\u5f0f\u8f93\u51fa\u3002<\/p>\n
                C:\\Program Files\\MongoDB\\Server\\3.2\\bin>mongo\r\nMongoDB shell version: 3.2.10\r\nconnecting to: test\r\n<\/code><\/pre>\n
                \u4e00\u65e6\u9000\u51faMongoDB shell\u3002<\/p>\n
                exit\r\n<\/code><\/pre>\n
                \u5efa\u7acbDB\u4f7f\u7528\u201cmapreducetest\u201d\u4f5c\u4e3a\u540d\u79f0\u521b\u5efa\u6570\u636e\u5e93\u3002
                \n\u7136\u540e\uff0c\u5728\u547d\u4ee4\u63d0\u793a\u7b26\u4e0b\uff0c\u5728\u201cc:\\Program Files\\MongoDB\\Server\\3.2\\bin\u201d\u76ee\u5f55\u4e2d\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u3002<\/p>\n
                mongo mapreducetest\r\n<\/code><\/pre>\n
                \u7136\u540e\uff0c\u5728MongoDB shell\u4e0a\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\u3002<\/p>\n
                use mapreducetest\r\nshow dbs\r\n<\/code><\/pre>\n
                \u4ee5\u4e0b\u662f\u5982\u4e0b\u7684\u60c5\u51b5.<\/p>\n
                c:\\Program Files\\MongoDB\\Server\\3.2\\bin>mongo mapreducetest\r\nMongoDB shell version: 3.2.10\r\nconnecting to: mapreducetest\r\n> use mapreducetest\r\nswitched to db mapreducetest\r\n> show dbs\r\nlocal  0.000GB\r\nmydb   0.000GB\r\n<\/code><\/pre>\n
                \u5e0c\u671b\u4f7f\u7528\u300cshow dbs\u300d\u547d\u4ee4\u80fd\u5920\u986f\u793a\u300cmapreducetest\u300d\uff0c\u4f46\u537b\u6c92\u6709\u986f\u793a\u51fa\u4f86\u3002\u8acb\u653e\u5fc3\uff0c\u53ea\u8981\u6dfb\u52a0\u4e0b\u5217\u8cc7\u6599\uff0c\u5b83\u5c31\u6703\u986f\u793a\u51fa\u4f86\u3002<\/p>\n
                \u6570\u636e\u8f93\u5165
                \n\u5c06\u6570\u636e\u8f93\u5165\u3002
                \n\u5c06\u6587\u6863\u6dfb\u52a0\u5230\u540d\u4e3a”animals”\u7684\u96c6\u5408\u4e2d\u3002
                \n\u8bf7\u5c06\u4ee5\u4e0b\u5185\u5bb9\u590d\u5236\u5e76\u7c98\u8d34\u5230MongoDB shell\u4e2d\u3002<\/p>\n
                db.animals.insert({\"type\":\"cheetah\",\"age\":24});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":14});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":20});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":3});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":32});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":2});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":24});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":14});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":20});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":3});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":32});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":2});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":24});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":14});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":20});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":3});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":32});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":2});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":24});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":14});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":20});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":3});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":32});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":2});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":24});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":14});\r\ndb.animals.insert({\"type\":\"cheetah\",\"age\":20});\r\ndb.animals.insert({\"type\":\"zebra\",\"age\":3});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":32});\r\ndb.animals.insert({\"type\":\"turtle\",\"age\":2});\r\n<\/code><\/pre>\n
                \u4f1a\u4ee5\u4ee5\u4e0b\u65b9\u5f0f\u663e\u793a\u3002<\/p>\n
                > db.animals.insert({\"type\":\"cheetah\",\"age\":24});\r\nWriteResult({ \"nInserted\" : 1 })\r\n> db.animals.insert({\"type\":\"zebra\",\"age\":14});\r\nWriteResult({ \"nInserted\" : 1 })\r\n> db.animals.insert({\"type\":\"cheetah\",\"age\":20});\r\nWriteResult({ \"nInserted\" : 1 })\r\n\r\n\uff5e \u4ee5\u964d\u3001\u7701\u7565 \uff5e\r\n<\/code><\/pre>\n
                \u8bf7\u952e\u5165\u4ee5\u4e0b\u5185\u5bb9\uff0c\u4ee5\u786e\u8ba4\u5b58\u50a8\u7684\u6570\u636e\u3002<\/p>\n
                db.animals.find();\r\n<\/code><\/pre>\n
                \u5b9e\u9645\u7ed3\u679c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
                \r\n> db.animals.find();\r\n{ \"_id\" : ObjectId(\"5b642d16c1c4784ac342eb66\"), \"type\" : \"cheetah\", \"age\" : 24 }\r\n{ \"_id\" : ObjectId(\"5b642d16c1c4784ac342eb67\"), \"type\" : \"zebra\", \"age\" : 14 }\r\n\r\n\uff5e \u4e2d\u7565 \uff5e\r\n{ \"_id\" : ObjectId(\"5b642d16c1c4784ac342eb79\"), \"type\" : \"zebra\", \"age\" : 14 }\r\nType \"it\" for more\r\n>\r\n<\/code><\/pre>\n
                \u8ba9\u6211\u4eec\u518d\u6b21\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u663e\u793a\u6570\u636e\u5e93\u5217\u8868\u3002<\/p>\n
                show dbs\r\n<\/code><\/pre>\n
                \u8fd9\u6b21\uff0c”mapreducetest”\u4e5f\u88ab\u6b63\u786e\u5730\u6dfb\u52a0\u4e86\u8fdb\u53bb\u3002<\/p>\n
                > show dbs\r\nlocal          0.000GB\r\nmapreducetest  0.000GB\r\nmydb           0.000GB\r\n>\r\n<\/code><\/pre>\n
                \u6267\u884cMapReduce
                \n\u8bf7\u5728MongoDB shell\u4e2d\u590d\u5236\u5e76\u7c98\u8d34\u4ee5\u4e0b\u5185\u5bb9\uff1a
                \n\u8bf7\u5b9a\u4e49map\u51fd\u6570\u548creduce\u51fd\u6570\uff0c\u5e76\u5c06\u5b83\u4eec\u4f20\u9012\u7ed9mapReduce()\uff0c\u4ee5\u83b7\u53d6MapReduce\u7684\u7ed3\u679c\u3002<\/p>\n
                var<\/span> map<\/span> =<\/span> function<\/span>()<\/span> {<\/span>\r\n  emit<\/span>(<\/span>this<\/span>.<\/span>type<\/span>,<\/span> {<\/span>count<\/span>:<\/span> 1<\/span>});<\/span>\r\n};<\/span>\r\n\r\nvar<\/span> reduce<\/span> =<\/span> function<\/span>(<\/span>key<\/span>,<\/span> values<\/span>)<\/span> {<\/span>\r\n  var<\/span> result<\/span> =<\/span> {<\/span>count<\/span>:<\/span> 0<\/span>};<\/span>\r\n  values<\/span>.<\/span>forEach<\/span>(<\/span>function<\/span>(<\/span>value<\/span>)<\/span> {<\/span>\r\n    result<\/span>.<\/span>count<\/span> +=<\/span> value<\/span>.<\/span>count<\/span>;<\/span>\r\n  });<\/span>\r\n  return<\/span> result<\/span>;<\/span>\r\n};<\/span>\r\n\r\ndb<\/span>.<\/span>animals<\/span>.<\/span>mapReduce<\/span>(<\/span>map<\/span>,<\/span> reduce<\/span>,<\/span> {<\/span>out<\/span>:<\/span> {<\/span>inline<\/span>:<\/span> 1<\/span>}});<\/span>\r\n<\/code><\/pre>\n
                \u7ed3\u679c\u5982\u4e0b\u3002<\/p>\n
                ><\/span> db<\/span>.<\/span>animals<\/span>.<\/span>mapReduce<\/span>(<\/span>map<\/span>,<\/span> reduce<\/span>,<\/span> {<\/span>out<\/span>:<\/span> {<\/span>inline<\/span>:<\/span> 1<\/span>}});<\/span>\r\n{<\/span>\r\n        \"<\/span>results<\/span>\"<\/span> :<\/span> [<\/span>\r\n                {<\/span>\r\n                        \"<\/span>_id<\/span>\"<\/span> :<\/span> \"<\/span>cheetah<\/span>\"<\/span>,<\/span>\r\n                        \"<\/span>value<\/span>\"<\/span> :<\/span> {<\/span>\r\n                                \"<\/span>count<\/span>\"<\/span> :<\/span> 10<\/span>\r\n                        }<\/span>\r\n                },<\/span>\r\n                {<\/span>\r\n                        \"<\/span>_id<\/span>\"<\/span> :<\/span> \"<\/span>turtle<\/span>\"<\/span>,<\/span>\r\n                        \"<\/span>value<\/span>\"<\/span> :<\/span> {<\/span>\r\n                                \"<\/span>count<\/span>\"<\/span> :<\/span> 10<\/span>\r\n                        }<\/span>\r\n                },<\/span>\r\n                {<\/span>\r\n                        \"<\/span>_id<\/span>\"<\/span> :<\/span> \"<\/span>zebra<\/span>\"<\/span>,<\/span>\r\n                        \"<\/span>value<\/span>\"<\/span> :<\/span> {<\/span>\r\n                                \"<\/span>count<\/span>\"<\/span> :<\/span> 10<\/span>\r\n                        }<\/span>\r\n                }<\/span>\r\n        ],<\/span>\r\n        \"<\/span>timeMillis<\/span>\"<\/span> :<\/span> 22<\/span>,<\/span>\r\n        \"<\/span>counts<\/span>\"<\/span> :<\/span> {<\/span>\r\n                \"<\/span>input<\/span>\"<\/span> :<\/span> 30<\/span>,<\/span>\r\n                \"<\/span>emit<\/span>\"<\/span> :<\/span> 30<\/span>,<\/span>\r\n                \"<\/span>reduce<\/span>\"<\/span> :<\/span> 3<\/span>,<\/span>\r\n                \"<\/span>output<\/span>\"<\/span> :<\/span> 3<\/span>\r\n        },<\/span>\r\n        \"<\/span>ok<\/span>\"<\/span> :<\/span> 1<\/span>\r\n}<\/span>\r\n><\/span>\r\n<\/code><\/pre>\n
                \u8fd9\u6837\u4e00\u6765\uff0c\u53ef\u4ee5\u6267\u884cMapReduce\u4e86\uff01<\/p>\n
                \u6700\u540e
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                \u8bf7\u53c2\u8003\u5728Mongo\u4e2d\u6267\u884cMapReduce\u64cd\u4f5c<\/p>\n
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                \u5728mongodb\u4e2d\u73a9MapReduce\u6e38\u620f<\/p>\n
                \u4ee5\u4e0a<\/p>\n","protected":false},"excerpt":{"rendered":"
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