{"id":168,"date":"2008-01-17T13:40:31","date_gmt":"2008-01-17T05:40:31","guid":{"rendered":"http:\/\/learn-house.idv.tw\/?p=168"},"modified":"2010-01-17T18:54:05","modified_gmt":"2010-01-17T10:54:05","slug":"%e5%88%86%e6%95%a3%e5%bc%8f%e9%9b%9c%e6%b9%8a%e8%a1%a8distributed-hash-tabledht%e6%87%89%e7%94%a8-kademlia","status":"publish","type":"post","link":"https:\/\/learn-house.idv.tw\/?p=168","title":{"rendered":"\u5206\u6563\u5f0f\u96dc\u6e4a\u8868(Distributed Hash Table,DHT)\u61c9\u7528 - Kademlia"},"content":{"rendered":"<p><strong>\u5206\u6563\u5f0f\u96dc\u6e4a\u8868<\/strong>\uff08\u82f1\u8a9e\uff1aDistributed Hash Table\uff0c\u7c21\u7a31<strong>DHT<\/strong>\uff09\u662f\u5206\u6563\u5f0f\u8a08\u7b97\u7cfb\u7d71\u4e2d\u7684\u4e00\u985e\uff0c\u7528\u4f86\u5c07\u4e00\u500b\u95dc\u9375\u503c\uff08key\uff09\u7684\u96c6\u5408\u5206\u6563\u5230\u6240\u6709\u5728\u5206\u6563\u5f0f\u7cfb\u7d71\u4e2d\u7684\u7bc0\u9ede\uff0c\u4e26\u4e14\u53ef\u4ee5\u6709\u6548\u5730\u5c07\u8a0a\u606f\u8f49\u9001\u5230\u552f\u4e00\u4e00\u500b\u64c1\u6709\u67e5\u8a62\u8005\u63d0\u4f9b\u7684\u95dc\u9375\u503c\u7684\u7bc0\u9ede\uff08Peers\uff09\u3002\u9019\u88e1\u7684\u7bc0\u9ede\u985e\u4f3c\u96dc\u6e4a\u8868\u4e2d\u7684\u5132\u5b58\u4f4d\u7f6e\u3002\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u901a\u5e38\u662f\u70ba\u4e86\u64c1\u6709\u6975\u5927\u7bc0\u9ede\u6578\u91cf\u7684\u7cfb\u7d71\uff0c\u800c\u4e14\u5728\u7cfb\u7d71\u7684\u7bc0\u9ede\u5e38\u5e38\u6703\u52a0\u5165\u6216\u96e2\u958b\uff08\u4f8b\u5982\u7db2\u8def\u65b7\u7dda\uff09\u800c\u8a2d\u8a08\u7684\u3002\u5728\u4e00\u500b\u7d50\u69cb\u6027\u7684<span class=\"new\">\u5ef6\u5c55\u7db2\u8def<\/span>\uff08<span class=\"extiw\">overlay network<\/span>\uff09\u4e2d\uff0c\u53c3\u52a0\u7684\u7bc0\u9ede\u9700\u8981\u8207\u7cfb\u7d71\u4e2d\u4e00\u5c0f\u90e8\u4efd\u7684\u7bc0\u9ede\u6e9d\u901a\uff0c\u9019\u4e5f\u9700\u8981\u4f7f\u7528\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u3002\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u53ef\u4ee5\u7528\u4ee5\u5efa\u7acb\u66f4\u8907\u96dc\u7684\u670d\u52d9\uff0c\u4f8b\u5982<span class=\"new\">\u5206\u6563\u5f0f\u6a94\u6848\u7cfb\u7d71<\/span>\u3001\u9ede\u5c0d\u9ede\u6280\u8853\u6a94\u6848\u5206\u4eab\u7cfb\u7d71\u3001\u5408\u4f5c\u7684<span class=\"new\">\u7db2\u9801\u5feb\u53d6<\/span>\u3001\u591a\u9ede\u50b3\u8f38\u3001<span class=\"new\">\u4efb\u610f\u9ede\u50b3\u8f38<\/span>\uff08<span class=\"extiw\">anycast<\/span>\uff09\u3001\u7db2\u57df\u540d\u7a31\u7cfb\u7d71\u4ee5\u53ca\u5373\u6642\u901a\u8a0a\u7b49\u3002<\/p>\n<p align=\"center\"><a href=\"http:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/9\/98\/DHT_en.svg\/800px-DHT_en.svg.png\" target=\"_blank\"><img decoding=\"async\" src=\"http:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/9\/98\/DHT_en.svg\/300px-DHT_en.svg.png\" border=\"0\" \/><\/a>&nbsp;<\/p>\n<h2><span class=\"mw-headline\">\u767c\u5c55\u80cc\u666f<\/span><\/h2>\n<p>\u7814\u7a76\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u7684\u4e3b\u8981\u52d5\u6a5f\u662f\u70ba\u4e86\u958b\u767c\u9ede\u5c0d\u9ede\u7cfb\u7d71\uff0c\u50cf\u662fNapster\u3001<span class=\"new\">Gnutella<\/span>\u53ca<span class=\"new\">Freenet<\/span>\u3002\u9019\u4e9b\u7cfb\u7d71\u5f97\u76ca\u65bc\u4f7f\u7528\u5206\u6563\u5728\u7db2\u969b\u7db2\u8def\u4e0a\u7684\u5404\u9805\u8cc7\u6e90\u4ee5\u63d0\u4f9b\u5be6\u7528\u7684\u61c9\u7528\uff0c\u7279\u5225\u5728\u983b\u5bec\u53ca\u786c\u789f\u5132\u5b58\u7a7a\u9593\u4e0a\uff0c\u4ed6\u5011\u6240\u63d0\u4f9b\u7684\u6a94\u6848\u5206\u4eab\u529f\u80fd\u56e0\u6b64\u5f97\u5230\u6700\u5927\u7684\u597d\u8655\u3002<\/p>\n<p>\u9019\u4e9b\u7cfb\u7d71\u4f7f\u7528\u4e0d\u540c\u7684\u65b9\u6cd5\u4f86\u89e3\u6c7a\u5982\u4f55<strong>\u627e\u5230\u64c1\u6709\u67d0\u8cc7\u6599\u7684\u7bc0\u9ede<\/strong>\u7684\u554f\u984c\u3002Napster \u4f7f\u7528\u4e2d\u592e\u7684\u7d22\u5f15\u4f3a\u670d\u5668\uff1a\u6bcf\u500b\u7bc0\u9ede\u52a0\u5165\u7db2\u8def\u7684\u540c\u6642\uff0c\u6703\u5c07\u4ed6\u5011\u6240\u64c1\u6709\u7684\u6a94\u6848\u5217\u8868\u50b3\u9001\u7d66\u4f3a\u670d\u5668\uff0c\u9019\u4f7f\u5f97\u4f3a\u670d\u5668\u53ef\u4ee5\u9032\u884c\u641c\u5c0b\u4e26\u5c07\u7d50\u679c\u56de\u50b3\u7d66\u9032\u884c\u67e5\u8a62\u7684\u7bc0\u9ede\u3002\u4f46\u4e2d\u592e \u7d22\u5f15\u4f3a\u670d\u5668\u8b93\u6574\u500b\u7cfb\u7d71\u6613\u53d7\u653b\u64ca\uff0c\u4e14\u53ef\u80fd\u9020\u6210\u6cd5\u5f8b\u554f\u984c\u3002\u65bc\u662f\uff0cGnutella \u548c\u76f8\u4f3c\u7684\u7db2\u8def\u6539\u7528\u5927\u91cf\u67e5\u8a62\u6a21\u5f0f\uff08flooding query model\uff09\uff1a\u6bcf\u6b21\u641c\u5c0b\u90fd\u6703\u628a\u67e5\u8a62\u8a0a\u606f\u5ee3\u64ad\u7d66\u7db2\u8def\u4e0a\u7684\u6240\u6709\u7bc0\u9ede\u3002\u96d6\u7136\u9019\u500b\u65b9\u5f0f\u80fd\u5920\u9632\u6b62<span class=\"new\">\u55ae\u9ede\u6545\u969c<\/span>\uff08<span class=\"extiw\">single point of failure<\/span>\uff09\uff0c\u4f46\u6bd4\u8d77 Napster \u4f86\u8aaa\u537b\u6975\u6c92\u6548\u7387\u3002<\/p>\n<p>\u6700\u5f8c\uff0cFreenet \u4f7f\u7528\u4e86\u5b8c\u5168\u5206\u6563\u5f0f\u7684\u7cfb\u7d71\uff0c\u4f46\u5b83\u5efa\u7f6e\u4e86\u4e00\u5957\u4f7f\u7528\u7d93\u9a57\u6cd5\u5247\u7684<span class=\"new\">\u57fa\u65bc\u95dc\u9375\u503c\u7684\u8f49\u9001\u65b9\u6cd5<\/span>\uff08<span class=\"extiw\">key based routing<\/span>\uff09\u3002\u5728\u9019\u500b\u65b9\u6cd5\u4e2d\uff0c\u6bcf\u500b\u6a94\u6848\u8207\u4e00\u500b\u95dc\u9375\u503c\u76f8\u7d50\u5408\uff0c\u800c\u64c1\u6709\u76f8\u4f3c\u95dc\u9375\u503c\u7684\u6a94\u6848\u6703\u50be\u5411\u88ab\u76f8\u4f3c\u7684\u7bc0\u9ede\u69cb\u6210\u7684\u96c6\u5408\u6240\u4fdd\u7ba1\u3002\u65bc\u662f\u67e5\u8a62\u8a0a\u606f\u5c31\u53ef\u4ee5\u6839\u64da\u5b83\u6240\u63d0\u4f9b\u7684\u95dc\u9375\u503c\u88ab\u8f49\u9001\u5230\u8a72\u96c6\u5408\uff0c\u800c\u4e0d\u9700\u8981\u7d93\u904e\u6240\u6709\u7684\u7bc0\u9ede\u3002\u7136\u800c\uff0cFreenet \u4e26\u4e0d\u4fdd\u8b49\u5b58\u5728\u7db2\u8def\u4e0a\u7684\u8cc7\u6599\u5728\u67e5\u8a62\u6642\u4e00\u5b9a\u6703\u88ab\u627e\u5230\u3002<\/p>\n<p>\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u70ba\u4e86\u9054\u5230 Gnutella \u8207 Freenet \u7684\u5206\u6563\u6027\uff08decentralization\uff09\u4ee5\u53ca Napster \u7684\u6548\u7387\u8207\u6b63\u78ba\u7d50\u679c\uff0c\u4f7f\u7528\u4e86\u8f03\u70ba\u7d50\u69cb\u5316\u7684\u57fa\u65bc\u95dc\u9375\u503c\u7684\u8f49\u9001\u65b9\u6cd5\u3002\u4e0d\u904e\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u4e5f\u6709\u500b Freenet \u6709\u7684\u7f3a\u9ede\uff0c\u5c31\u662f\u53ea\u80fd\u4f5c\u7cbe\u78ba\u641c\u5c0b\uff0c\u800c\u4e0d\u80fd\u53ea\u63d0\u4f9b\u90e8\u4efd\u7684\u95dc\u9375\u5b57\uff1b\u4f46\u9019\u500b\u529f\u80fd\u53ef\u4ee5\u5728\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u7684\u4e0a\u5c64\u5be6\u505a\u3002<\/p>\n<p>\u6700\u521d\u7684\u56db\u9805\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u6280\u8853&mdash;&mdash;<span class=\"new\">\u5167\u5bb9\u53ef\u5b9a\u5740\u7db2\u8def<\/span>\uff08<span class=\"extiw\">Content addressable network<\/span>\uff0cCAN\uff09\u3001<span class=\"new\">Chord<\/span>\uff08<span class=\"extiw\">Chord project<\/span>\uff09\u3001<span class=\"new\">Pastry<\/span>\uff08<span class=\"extiw\">Pastry (DHT)<\/span>\uff09\uff0c\u4ee5\u53ca <span class=\"new\">Tapestry (DHT)<\/span>\uff08<span class=\"extiw\">Tapestry (DHT)<\/span>\uff09\u7686\u540c\u6642\u65bc2001\u5e74\u767c\u8868\u3002\u5f9e\u90a3\u6642\u958b\u59cb\uff0c\u76f8\u95dc\u7684\u7814\u7a76\u4fbf\u4e00\u76f4\u5341\u5206\u6d3b\u8e8d\u3002\u5728\u5b78\u8853\u9818\u57df\u4ee5\u5916\uff0c\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u6280\u8853\u5df2\u7d93\u88ab\u61c9\u7528\u5728BitTorrent\u53ca<span class=\"new\">CoralCDN<\/span>\uff08<span class=\"extiw\">Coral Content Distribution Network<\/span>\uff09\u7b49\u3002<\/p>\n<h2><span class=\"mw-headline\">\u7d50\u69cb<\/span><\/h2>\n<p>\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u7684\u7d50\u69cb\u53ef\u4ee5\u5206\u6210\u5e7e\u500b\u4e3b\u8981\u7684\u5143\u4ef6<sup class=\"reference\" id=\"_ref-1\"><\/sup>\u3002\u5176\u57fa\u790e\u662f\u4e00\u500b\u62bd\u8c61\u7684<strong>\u95dc\u9375\u503c\u7a7a\u9593<\/strong>\uff08keyspace\uff09\uff0c\u4f8b\u5982\u8aaa\u6240\u6709160\u4f4d\u5143\u9577\u7684\u5b57\u5143\u4e32\u96c6\u5408\u3002<strong>\u95dc\u9375\u503c\u7a7a\u9593\u5206\u5272<\/strong>\uff08keyspace partitioning\uff09\u5c07\u95dc\u9375\u503c\u7a7a\u9593\u5206\u5272\u6210\u6578\u500b\uff0c\u4e26\u6307\u5b9a\u5230\u5728\u6b64\u7cfb\u7d71\u7684\u7bc0\u9ede\u4e2d\u3002\u800c<strong>\u5ef6\u5c55\u7db2\u8def<\/strong>\u5247\u9023\u63a5\u9019\u4e9b\u7bc0\u9ede\uff0c\u4e26\u8b93\u4ed6\u5011\u80fd\u5920\u85c9\u7531\u5728\u95dc\u9375\u503c\u7a7a\u9593\u5167\u7684\u4efb\u4e00\u503c\u627e\u5230\u64c1\u6709\u8a72\u503c\u7684\u7bc0\u9ede\u3002<\/p>\n<p>\u7576\u9019\u4e9b\u5143\u4ef6\u90fd\u6e96\u5099\u597d\u5f8c\uff0c\u4e00\u822c\u4f7f\u7528\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u4f86\u5132\u5b58\u8207\u8b80\u53d6\u7684\u65b9\u5f0f\u5982\u4e0b\u6240\u8ff0\u3002\u5047\u8a2d\u95dc\u9375\u503c\u7a7a\u9593\u662f\u4e00\u500b160\u4f4d\u5143\u9577\u7684\u5b57\u5143\u4e32\u96c6\u5408\u3002\u70ba\u4e86\u5728\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u4e2d\u5132\u5b58\u4e00\u500b\u6a94\u6848\uff0c\u540d\u7a31\u70ba <span class=\"texhtml\"><em>f<\/em><em>i<\/em><em>l<\/em><em>e<\/em><em>n<\/em><em>a<\/em><em>m<\/em><em>e<\/em><\/span> \u4e14\u5167\u5bb9\u70ba <span class=\"texhtml\"><em>d<\/em><em>a<\/em><em>t<\/em><em>a<\/em><\/span>\uff0c\u6211\u5011\u8a08\u7b97\u51fa <span class=\"texhtml\"><em>f<\/em><em>i<\/em><em>l<\/em><em>e<\/em><em>n<\/em><em>a<\/em><em>m<\/em><em>e<\/em><\/span> \u7684 SHA1 \u96dc\u6e4a\u503c&mdash;&mdash;\u4e00\u500b160\u4f4d\u5143\u7684\u95dc\u9375\u503c <span class=\"texhtml\"><em>k<\/em><\/span>&mdash;&mdash;\u4e26\u5c07\u8a0a\u606f <span class=\"texhtml\"><em>p<\/em><em>u<\/em><em>t<\/em>(<em>k<\/em>,<em>d<\/em><em>a<\/em><em>t<\/em><em>a<\/em>)<\/span> \u9001\u7d66\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u4e2d\u7684\u4efb\u610f\u53c3\u8207\u7bc0\u9ede\u3002\u6b64\u8a0a\u606f\u5728\u5ef6\u5c55\u7db2\u8def\u4e2d\u88ab\u8f49\u9001\uff0c\u76f4\u5230\u62b5\u9054\u5728\u95dc\u9375\u503c\u7a7a\u9593\u5206\u5272\u4e2d\u88ab\u6307\u5b9a\u8ca0\u8cac\u5132\u5b58\u95dc\u9375\u503c <span class=\"texhtml\"><em>k<\/em><\/span> \u7684\u7bc0\u9ede\u3002\u800c <span class=\"texhtml\">(<em>k<\/em>,<em>d<\/em><em>a<\/em><em>t<\/em><em>a<\/em>)<\/span> \u5373\u5132\u5b58\u5728\u8a72\u7bc0\u9ede\u3002\u5176\u4ed6\u7684\u7bc0\u9ede\u53ea\u9700\u8981\u91cd\u65b0\u8a08\u7b97 <span class=\"texhtml\"><em>f<\/em><em>i<\/em><em>l<\/em><em>e<\/em><em>n<\/em><em>a<\/em><em>m<\/em><em>e<\/em><\/span> \u7684\u96dc\u6e4a\u503c <span class=\"texhtml\"><em>k<\/em><\/span>\uff0c\u7136\u5f8c\u9001\u51fa\u8a0a\u606f <span class=\"texhtml\"><em>g<\/em><em>e<\/em><em>t<\/em>(<em>k<\/em>)<\/span> \u7d66\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u4e2d\u7684\u4efb\u610f\u53c3\u8207\u7bc0\u9ede\uff0c\u4ee5\u6b64\u4f86\u627e\u8207 <span class=\"texhtml\"><em>k<\/em><\/span> \u76f8\u95dc\u7684\u8cc7\u6599\u3002\u6b64\u8a0a\u606f\u4e5f\u6703\u5728\u5ef6\u5c55\u7db2\u8def\u4e2d\u88ab\u8f49\u9001\u5230\u8ca0\u8cac\u5132\u5b58 <span class=\"texhtml\"><em>k<\/em><\/span> \u7684\u7bc0\u9ede\u3002\u800c\u6b64\u7bc0\u9ede\u5247\u6703\u8ca0\u8cac\u50b3\u56de\u5132\u5b58\u7684\u8cc7\u6599 <span class=\"texhtml\"><em>d<\/em><em>a<\/em><em>t<\/em><em>a<\/em><\/span>\u3002<\/p>\n<p>\u4ee5\u4e0b\u5206\u5225\u63cf\u8ff0\u95dc\u9375\u503c\u7a7a\u9593\u5206\u5272\u53ca\u5ef6\u5c55\u7db2\u8def\u7684\u57fa\u672c\u6982\u5ff5\u3002\u9019\u4e9b\u6982\u5ff5\u5728\u5927\u591a\u6578\u7684\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u5be6\u4f5c\u4e2d\u662f\u76f8\u540c\u7684\uff0c\u4f46\u8a2d\u8a08\u7684\u7d30\u7bc0\u90e8\u4efd\u5247\u5927\u591a\u4e0d\u540c\u3002<\/p>\n<p><a name=\".E9.97.9C.E9.8D.B5.E5.80.BC.E7.A9.BA.E9.96.93.E5.88.86.E5.89.B2\" title=\".E9.97.9C.E9.8D.B5.E5.80.BC.E7.A9.BA.E9.96.93.E5.88.86.E5.89.B2\"><\/a><\/p>\n<h3><span class=\"editsection\"><\/span><span class=\"mw-headline\">\u95dc\u9375\u503c\u7a7a\u9593\u5206\u5272<\/span><\/h3>\n<p>\u5927\u591a\u6578\u7684\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u4f7f\u7528\u67d0\u4e9b<span class=\"new\">\u7a69\u5b9a\u96dc\u6e4a<\/span>\uff08<span class=\"extiw\">consistent hashing<\/span>\uff09\u65b9\u6cd5\u4f86\u5c07\u95dc\u9375\u503c\u5c0d\u61c9\u5230\u7bc0\u9ede\u3002\u6b64\u65b9\u6cd5\u4f7f\u7528\u4e86\u4e00\u500b\u51fd\u6578 <span class=\"texhtml\">&delta;(<em>k<\/em><sub>1<\/sub>,<em>k<\/em><sub>2<\/sub>)<\/span> \u4f86\u5b9a\u7fa9\u4e00\u500b\u62bd\u8c61\u7684\u6982\u5ff5\uff1a\u5f9e\u95dc\u9375\u503c<span class=\"texhtml\"><em>k<\/em><sub>1<\/sub><\/span> \u5230 <span class=\"texhtml\"><em>k<\/em><sub>2<\/sub><\/span> \u7684\u8ddd\u96e2\u3002\u6bcf\u500b\u7bc0\u9ede\u88ab\u6307\u5b9a\u4e86\u4e00\u500b\u95dc\u9375\u503c\uff0c\u7a31\u70baID\u3002ID \u70ba <span class=\"texhtml\"><em>i<\/em><\/span> \u7684\u7bc0\u9ede\u64c1\u6709\u6839\u64da\u51fd\u6578 <span class=\"texhtml\">&delta;<\/span> \u8a08\u7b97\uff0c\u6700\u63a5\u8fd1 <span class=\"texhtml\"><em>i<\/em><\/span> \u7684\u6240\u6709\u95dc\u9375\u503c\u3002<\/p>\n<blockquote>\n<p><strong>\u4f8b\uff1a<\/strong>Chord \u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u5be6\u4f5c\u5c07\u95dc\u9375\u503c\u8996\u70ba\u4e00\u500b\u5713\u4e0a\u7684\u9ede\uff0c\u800c <span class=\"texhtml\">&delta;(<em>k<\/em><sub>1<\/sub>,<em>k<\/em><sub>2<\/sub>)<\/span> \u5247\u662f\u6cbf\u8457\u5713\u9806\u6642\u9418\u5730\u5f9e <span class=\"texhtml\"><em>k<\/em><sub>1<\/sub><\/span> \u8d70\u5230 <span class=\"texhtml\"><em>k<\/em><sub>2<\/sub><\/span> \u7684\u8ddd\u96e2\u3002\u7d50\u679c\uff0c\u5713\u5f62\u7684\u95dc\u9375\u503c\u7a7a\u9593\u5c31\u88ab\u5207\u6210\u9023\u7e8c\u7684\u5713\u5f27\u6bb5\uff0c\u800c\u6bcf\u6bb5\u7684\u7aef\u9ede\u90fd\u662f\u7bc0\u9ede\u7684ID\u3002\u5982\u679c <span class=\"texhtml\"><em>i<\/em><sub>1<\/sub><\/span> \u8207 <span class=\"texhtml\"><em>i<\/em><sub>2<\/sub><\/span> \u662f\u9130\u8fd1\u7684 ID\uff0c\u5247 ID \u70ba <span class=\"texhtml\"><em>i<\/em><sub>2<\/sub><\/span> \u7684\u7bc0\u9ede\u64c1\u6709\u843d\u5728 <span class=\"texhtml\"><em>i<\/em><sub>1<\/sub><\/span> \u53ca <span class=\"texhtml\"><em>i<\/em><sub>2<\/sub><\/span> \u4e4b\u9593\u7684\u6240\u6709\u95dc\u9375\u503c\u3002<\/p>\n<\/blockquote>\n<p>\u7a69\u5b9a\u96dc\u6e4a\u64c1\u6709\u4e00\u500b\u57fa\u672c\u7684\u6027\u8cea\uff1a\u589e\u52a0\u6216\u79fb\u9664\u7bc0\u9ede\u53ea\u6539\u8b8a\u9130\u8fd1ID\u7684\u7bc0\u9ede\u6240\u64c1\u6709\u7684\u95dc\u9375\u503c\u96c6\u5408\uff0c\u800c\u5176\u4ed6\u7bc0\u9ede\u7684\u5247\u4e0d\u6703\u88ab\u6539\u8b8a\u3002\u5c0d\u6bd4\u65bc\u50b3\u7d71\u7684\u96dc\u6e4a\u8868\uff0c\u82e5\u589e\u52a0\u6216\u79fb \u9664\u4e00\u500b\u4f4d\u7f6e\uff0c\u5247\u6574\u500b\u95dc\u9375\u503c\u7a7a\u9593\u5c31\u5fc5\u9808\u91cd\u65b0\u5c0d\u61c9\u3002\u7531\u65bc\u64c1\u6709\u8cc7\u6599\u7684\u6539\u8b8a\u901a\u5e38\u6703\u5c0e\u81f4\u8cc7\u6599\u5f9e\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u4e2d\u7684\u4e00\u500b\u7bc0\u9ede\u88ab\u642c\u5230\u53e6\u4e00\u500b\u7bc0\u9ede\uff0c\u800c\u9019\u662f\u975e\u5e38\u6d6a\u8cbb\u983b\u5bec\u7684\uff0c\u56e0 \u6b64\u82e5\u8981\u6709\u6548\u7387\u5730\u652f\u63f4\u5927\u91cf\u5bc6\u96c6\u7684\u7bc0\u9ede\u589e\u52a0\u6216\u96e2\u958b\u7684\u52d5\u4f5c\uff0c\u9019\u7a2e\u91cd\u65b0\u914d\u7f6e\u7684\u884c\u70ba\u5fc5\u9808\u76e1\u91cf\u6e1b\u5c11\u3002<\/p>\n<p><a name=\".E5.BB.B6.E5.B1.95.E7.B6.B2.E8.B7.AF\" title=\".E5.BB.B6.E5.B1.95.E7.B6.B2.E8.B7.AF\"><\/a><\/p>\n<h3><span class=\"editsection\"><\/span><span class=\"mw-headline\">\u5ef6\u5c55\u7db2\u8def<\/span><\/h3>\n<p>\u6bcf\u500b\u7bc0\u9ede\u4fdd\u6709\u4e00\u4e9b\u5230\u5176\u4ed6\u7bc0\u9ede\uff08\u5b83\u7684\u9130\u5c45\uff09\u7684\u9023\u7d50\u3002\u5c07\u9019\u4e9b\u9023\u7d50\u7e3d\u5408\u8d77\u4f86\u5c31\u5f62\u6210\u5ef6\u5c55\u7db2\u8def\u3002\u800c\u9019\u4e9b\u9023\u7d50\u662f\u4f7f\u7528\u4e00\u500b\u7d50\u69cb\u6027\u7684\u65b9\u5f0f\u4f86\u6311\u9078\u7684\uff0c\u7a31\u70ba\u7db2\u8def\u62d3\u6a38\u3002<\/p>\n<p>\u6240\u6709\u7684\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u5be6\u4f5c\u62d3\u6a38\u6709\u67d0\u4e9b\u57fa\u672c\u7684\u6027\u8cea\uff1a\u5c0d\u65bc\u4efb\u4e00\u95dc\u9375\u503c <span class=\"texhtml\"><em>k<\/em><\/span>\uff0c\u67d0\u500b\u7bc0\u9ede\u8981\u4e0d\u5c31\u64c1\u6709 <span class=\"texhtml\"><em>k<\/em><\/span>\uff0c\u8981\u4e0d\u5c31\u64c1\u6709\u4e00\u500b\u9023\u7d50\u80fd\u9023\u7d50\u5230\u8ddd\u96e2\u8f03\u63a5\u8fd1 <span class=\"texhtml\"><em>k<\/em><\/span> \u7684\u7bc0\u9ede\u3002\u56e0\u6b64\u4f7f\u7528\u4ee5\u4e0b\u7684\u8caa\u5fc3\u6f14\u7b97\u6cd5\u5373\u53ef\u5bb9\u6613\u5730\u5c07\u8a0a\u606f\u8f49\u9001\u5230\u64c1\u6709\u95dc\u9375\u503c <span class=\"texhtml\"><em>k<\/em><\/span> \u7684\u7bc0\u9ede\uff1a\u5728\u6bcf\u6b21\u57f7\u884c\u6642\uff0c\u5c07\u8a0a\u606f\u8f49\u9001\u5230 ID \u8f03\u63a5\u8fd1 <span class=\"texhtml\"><em>k<\/em><\/span> \u7684\u9130\u8fd1\u7bc0\u9ede\u3002\u82e5\u6c92\u6709\u9019\u6a23\u7684\u7bc0\u9ede\uff0c\u90a3\u6211\u5011\u4e00\u5b9a\u62b5\u9054\u4e86\u6700\u63a5\u8fd1 <span class=\"texhtml\"><em>k<\/em><\/span> \u7684\u7bc0\u9ede\uff0c\u4e5f\u5c31\u662f\u64c1\u6709 <span class=\"texhtml\"><em>k<\/em><\/span> \u7684\u7bc0\u9ede\u3002\u9019\u6a23\u7684\u8f49\u9001\u65b9\u6cd5\u6709\u6642\u88ab\u7a31\u70ba\u300c\u57fa\u65bc\u95dc\u9375\u503c\u7684\u8f49\u9001\u65b9\u6cd5\u300d\u3002<\/p>\n<p>\u9664\u4e86\u57fa\u672c\u7684\u8f49\u9001\u6b63\u78ba\u6027\u4e4b\u5916\uff0c\u62d3\u6a38\u4e2d\u53e6\u6709\u5169\u500b\u95dc\u9375\u7684\u9650\u5236\uff1a\u5176\u4e00\u70ba\u4fdd\u8b49\u4efb\u4f55\u7684\u8f49\u9001\u8def\u5f91\u9577\u5ea6\u5fc5\u9808\u76e1\u91cf\u77ed\uff0c\u56e0\u800c\u8acb\u6c42\u80fd\u5feb\u901f\u5730\u88ab\u5b8c\u6210\uff1b\u5176\u4e8c\u70ba\u4efb\u4e00\u7bc0\u9ede\u7684\u9130\u8fd1\u7bc0\u9ede\u6578\u76ee\uff08\u53c8\u7a31\u6700\u5927\u7bc0\u9ede\u5ea6\uff08<span class=\"extiw\">Degree (graph theory)<\/span>\uff09\uff09\u5fc5\u9808\u76e1\u91cf\u5c11\uff0c\u56e0\u6b64\u7dad\u8b77\u7684\u82b1\u8cbb\u4e0d\u6703\u904e\u591a\u3002\u7576\u7136\uff0c\u8f49\u9001\u9577\u5ea6\u8d8a\u77ed\uff0c\u5247\u6700\u5927\u7bc0\u9ede\u5ea6\u8d8a\u5927\u3002\u4ee5\u4e0b\u5217\u51fa\u5e38\u898b\u7684\u6700\u5927\u7bc0\u9ede\u5ea6\u53ca\u8f49\u9001\u9577\u5ea6\uff08<span class=\"texhtml\"><em>n<\/em><\/span> \u70ba\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u4e2d\u7684\u7bc0\u9ede\u6578\uff09<\/p>\n<ul>\n<li>\u6700\u5927\u7bc0\u9ede\u5ea6 <span class=\"texhtml\"><em>O<\/em>(1)<\/span>\uff0c\u8f49\u9001\u9577\u5ea6 <span class=\"texhtml\"><em>O<\/em>(log<em>n<\/em>)<\/span><\/li>\n<li>\u6700\u5927\u7bc0\u9ede\u5ea6 <span class=\"texhtml\"><em>O<\/em>(log<em>n<\/em>)<\/span>\uff0c\u8f49\u9001\u9577\u5ea6 <span class=\"texhtml\"><em>O<\/em>(log<em>n<\/em> \/ loglog<em>n<\/em>)<\/span><\/li>\n<li>\u6700\u5927\u7bc0\u9ede\u5ea6 <span class=\"texhtml\"><em>O<\/em>(log<em>n<\/em>)<\/span>\uff0c\u8f49\u9001\u9577\u5ea6 <span class=\"texhtml\"><em>O<\/em>(log<em>n<\/em>)<\/span><\/li>\n<li>\u6700\u5927\u7bc0\u9ede\u5ea6 <span class=\"texhtml\"><em>O<\/em>(<em>n<\/em><sup>1 \/ 2<\/sup>)<\/span>\uff0c\u8f49\u9001\u9577\u5ea6 <span class=\"texhtml\"><em>O<\/em>(1)<\/span><\/li>\n<\/ul>\n<p>\u7b2c\u4e09\u500b\u9078\u64c7\u6700\u70ba\u5e38\u898b\u3002\u96d6\u7136\u4ed6\u5728\u6700\u5927\u7bc0\u9ede\u5ea6\u8207\u8f49\u9001\u9577\u5ea6\u7684\u53d6\u6368\u4e2d\u4e26\u4e0d\u662f\u6700\u4f73\u7684\u9078\u64c7\uff0c\u4f46\u9019\u6a23\u7684\u62d3\u6a38\u5141\u8a31\u8f03\u70ba\u6709\u5f48\u6027\u5730\u9078\u64c7\u9130\u8fd1\u7bc0\u9ede\u3002\u8a31\u591a\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u5be6\u4f5c\u5229\u7528\u9019\u7a2e\u5f48\u6027\u4f86\u9078\u64c7\u5ef6\u9072\u8f03\u4f4e\u7684\u9130\u8fd1\u7bc0\u9ede\u3002<\/p>\n<p>\u6700\u5927\u7684\u8f49\u9001\u9577\u5ea6\u8207<span class=\"new\">\u76f4\u5f91<\/span>\u6709\u95dc\uff1a\u6700\u9060\u7684\u5169\u7bc0\u9ede\u4e4b\u9593\u7684\u6700\u77ed\u8ddd\u96e2\u3002\u7121\u7591\u5730\uff0c\u7db2\u8def\u7684\u6700\u5927\u8f49\u9001\u9577\u5ea6\u81f3\u5c11\u8981\u8207\u5b83\u7684\u76f4\u5f91\u4e00\u6a23\u9577\uff0c\u56e0\u800c\u62d3\u6a38\u4e5f\u88ab\u6700\u5927\u7bc0\u9ede\u5ea6\u8207\u76f4\u5f91\u7684\u53d6\u6368\u9650\u5236\u4f4f\uff0c\u800c\u9019\u5728\u5716\u8ad6\u4e2d\u662f\u57fa\u672c\u7684\u6027\u8cea\u3002\u56e0\u70ba\u8caa\u5a6a\u6f14\u7b97\u6cd5(Greed Method)\u53ef\u80fd\u627e\u4e0d\u5230\u6700\u77ed\u8def\u5f91\uff0c\u56e0\u6b64\u8f49\u9001\u9577\u5ea6\u53ef\u80fd\u6bd4\u76f4\u5f91\u9577\u3002<\/p>\n<p>&nbsp; <\/p>\n<h2><span class=\"mw-headline\">\u7bc4\u4f8b<\/span><\/h2>\n<p><a name=\".E5.88.86.E6.95.A3.E5.BC.8F.E9.9B.9C.E6.B9.8A.E8.A1.A8.E5.AF.A6.E4.BD.9C.E8.88.87.E5.8D.94.E5.AE.9A\" title=\".E5.88.86.E6.95.A3.E5.BC.8F.E9.9B.9C.E6.B9.8A.E8.A1.A8.E5.AF.A6.E4.BD.9C.E8.88.87.E5.8D.94.E5.AE.9A\"><\/a><\/p>\n<h3><span class=\"editsection\"><\/span><span class=\"mw-headline\">\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\u5be6\u4f5c\u8207\u5354\u5b9a<\/span><\/h3>\n<ul>\n<li><span class=\"new\">Bamboo<\/span><\/li>\n<li><span class=\"new\">Bunshin<\/span><\/li>\n<li><span class=\"new\">\u5167\u5bb9\u53ef\u5b9a\u5740\u7db2\u8def<\/span> (Content Addressable Network)<\/li>\n<li><span class=\"new\">Chord<\/span><\/li>\n<li><span class=\"new\">DKS\u7cfb\u7d71<\/span><\/li>\n<li><font color=\"#ff0000\"><strong>Kademlia<\/strong><\/font><\/li>\n<li><span class=\"new\">Leopard<\/span><\/li>\n<li><span class=\"new\">MACE<\/span><\/li>\n<li><span class=\"new\">Pastry<\/span><\/li>\n<li><span class=\"new\">P-Grid<\/span><\/li>\n<li><span class=\"new\">Tapestry<\/span><\/li>\n<p><\/ul>\n<p class=\"MsoNormal\"><strong><span style=\"font-family: \u65b0\u7d30\u660e\u9ad4\">Kademlia <\/span><\/strong><strong><span style=\"font-family: \u65b0\u7d30\u660e\u9ad4\">\u7db2\u8def\u7684\u8a73\u7d30\u89e3\u91cb<span><\/p>\n<p> <\/span><\/span><\/strong><span style=\"font-family: \u65b0\u7d30\u660e\u9ad4\">\u57fa\u672c\u4e0a\uff0c<span>Kademlia<\/span>\u4e0d\u662f\u4e00\u500b\u7db2\u8def\uff0c\u662f\u4e00\u500b\u5f88\u71b1\u9580\u7684\u6280\u8853\uff0c\u901a\u7a31\u70ba<span>DHT (Distributed Hash Table <\/span>\u5206\u6563\u5f0f\u96dc\u6e4a\u8868<span>)<\/span>\u3002<strong><span>Kademlia<\/span><\/strong><span> <\/span>\u662f\u500b <span>Petar Maymounkov <\/span>\u8207 <span>David Mazi&egrave;res <\/span>\u6240\u8a2d\u8a08\u7684\u9ede\u5c0d\u9ede<span> (P2P) <\/span>\u91cd\u758a\u7db2\u8def\uff0c \u4ee5\u9054\u6210\u975e\u96c6\u4e2d\u5f0f\u7684\u9ede\u5c0d\u9ede<span> (P2P) <\/span>\u96fb\u8166\u7db2\u8def\u3002\u5b83\u898f\u5236\u4e86\u7db2\u8def\u7684\u7d50\u69cb\u53ca\u898f\u7bc4\u4e86\u7bc0\u9ede\u9593\u7684\u901a\u8a0a\u548c\u4ea4\u63db\u8cc7\u8a0a\u7684\u65b9\u5f0f\u3002<span>Kademlia <\/span>\u7bc0\u9ede\u9593\u4f7f\u7528\u50b3\u8f38\u901a\u8a0a\u5354\u5b9a<span>UDP<\/span>\u6e9d\u901a\u3002<span>Kademlia <\/span>\u7bc0\u9ede\u85c9\u4ee5\u5be6\u4f5c\u5206\u6563\u5f0f\u96dc\u6e4a\u8868<span> (DHT,distributed hash table) <\/span>\u4ee5\u5132\u5b58\u8cc7\u6599\u3002\u900f\u904e\u65e2\u6709\u7684\u5340\u57df\u7db2<span>\/<\/span>\u5ee3\u57df\u7db2<span>( LAN\/WAN) <\/span>\uff08\u5982\u540c\u7db2\u969b\u7db2\u8def\uff09\uff0c\u4e00\u500b\u65b0\u7684\u865b\u64ec\u7db2\u8def\u6216\u662f\u91cd\u758a\u7db2\u8def\u88ab\u5efa\u7acb\u8d77\u4f86\u3002\u6bcf\u500b\u7db2\u8def\u7bc0\u9ede\u90fd\u662f\u4ee5\u4e00\u7d44\u6578\u5b57\uff08\u300c\u7bc0\u9ede<span> ID<\/span>\u300d\uff09\u4f86\u8b58\u5225\u3002\u9019\u7d44\u6578\u5b57\u4e0d\u4f46\u505a\u70ba\u8b58\u5225\u4e4b\u7528\uff0c<span>Kademlia <\/span>\u6f14\u7b97\u6cd5\u9084\u6703\u7528\u4f86\u505a\u5176\u4ed6\u7528\u9014\u3002 <span><\/span><\/span><\/p>\n<p>\u4e00\u500b\u60f3\u8981\u52a0\u5165\u7db2\u8def\u7684\u7bc0\u9ede\u9700\u8981\u5148\u901a\u904e<span class=\"new\">\u555f\u52d5<\/span>\u3002\u5728\u9019\u500b\u968e\u6bb5\uff0c\u9019\u500b\u7bc0\u9ede\u9700\u8981\u77e5\u9053\u53e6\u4e00\u500b\u5df2\u7d93\u5728 Kademlia \u7db2\u8def\u5167\u7684\u7bc0\u9ede\u4e4b IP \u4f4d\u5740 \uff08\u900f\u904e\u53e6\u4e00\u500b\u4f7f\u7528\u8005\u6216\u5132\u5b58\u7684\u6e05\u55ae\u53d6\u5f97\uff09\u3002\u5982\u679c\u555f\u52d5\u4e2d\u7684\u7bc0\u9ede\u9084\u4e0d\u662f\u7db2\u8def\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u4fbf\u6703\u8a08\u7b97\u4e00\u500b\u5c1a\u672a\u6307\u5b9a\u7d66\u5176\u4ed6\u7bc0\u9ede\u7684\u96a8\u6a5f ID \u7de8\u865f\u3002\u9019\u500b ID \u6703\u4e00\u76f4\u4f7f\u7528\u5230\u96e2\u958b\u7db2\u8def\u70ba\u6b62\u3002<\/p>\n<p class=\"MsoNormal\">Kademlia \u6f14\u7b97\u6cd5\u662f\u57fa\u65bc\u5169\u7bc0\u9ede\u9593\u7684\u300c\u8ddd\u96e2\u300d\u4f86\u8a08\u7b97\u3002\u9019\u500b\u8ddd\u96e2\u662f\u4ee5\u5169\u7bc0\u9ede\u7684 ID \u9032\u884c\u7570\u6216\u904b\u7b97\uff0c\u4e26\u5c07\u7d50\u679c\u56db\u6368\u4e94\u5165\u81f3\u6574\u6578\u3002\u9019\u500b\u300c\u8ddd\u96e2\u300d\u8ddf\u5be6\u969b\u7684\u5730\u7406\u74b0\u5883\u7121\u95dc\uff0c\u800c\u662f\u6a19\u660e ID \u7bc4\u570d\u5167\u7684\u8ddd\u96e2\u3002\u56e0\u6b64\u4e00\u500b\u5fb7\u570b\u7684\u7bc0\u9ede\u548c\u4e00\u500b\u6fb3\u6d32\u7684\u7bc0\u9ede\u5c31\u6709\u53ef\u80fd\u88ab\u7a31\u70ba\u300c\u9130\u5c45\u300d\u6216\u300c\u82b3\u9130\u300d\u3002<span style=\"font-family: \u65b0\u7d30\u660e\u9ad4\"><span> <\/span><\/span><\/p>\n<p>Kademlia \u5167\u7684\u8cc7\u8a0a\u90fd\u5132\u5b58\u5728\u7a31\u70ba\u300c\u6578\u503c\u300d\u7684\u6771\u897f\u5167\uff0c\u6bcf\u500b\u6578\u503c\u90fd\u9023\u63a5\u8457\u4e00\u500b\u300c\u91d1\u9470\u300d\u3002\u7576\u641c\u5c0b\u67d0\u500b\u91d1\u9470\u6642\uff0c\u6f14\u7b97\u6cd5\u6703\u900f\u904e\u5e7e\u500b\u6b65\u9a5f\u63a2\u6574\u500b\u7db2\u8def\u4e00\u5708\uff0c\u6bcf\u500b\u6b65\u9a5f\u90fd\u6703\u66f4\u63a5\u8fd1\u8981\u641c\u5c0b\u7684\u91d1\u9470\uff0c\u76f4\u5230\u88ab\u9023\u7dda\u7684\u7bc0\u9ede\u50b3\u56de\u6578\u503c\uff0c\u6216\u627e\u4e0d\u5230\u66f4\u8fd1\u7684\u7bc0\u9ede\u3002\u7db2\u8def\u7684 \u5927\u5c0f\u50c5\u6703\u7a0d\u5fae\u5f71\u97ff\u5230\u9032\u884c\u641c\u5c0b\u6642\u63a5\u89f8\u5230\u7684\u7bc0\u9ede\u6578\u76ee\uff1a\u5047\u5982\u76ee\u524d\u7db2\u8def\u7684\u4f7f\u7528\u8005\u7a81\u7136\u589e\u70ba\u5169\u500d\uff0c\u90a3\u4f7f\u7528\u8005\u7bc0\u9ede\u5927\u6982\u53ea\u9700\u8981\u5728\u641c\u5c0b\u6642\u591a\u67e5\u8a62\u4e00\u500b\u7bc0\u9ede\uff0c\u800c\u4e0d\u662f\u5169\u500d\u7684\u7bc0\u9ede \u91cf\u3002<\/p>\n<p class=\"MsoNormal\">\u975e\u96c6\u4e2d\u5f0f\u7684\u7d50\u69cb\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u512a\u52e2\uff0c\u4e26\u5f88\u660e\u986f\u5730\u589e\u52a0\u4e86\u5c0d<a class=\"new\" href=\"http:\/\/zh.wikipedia.org\/w\/index.php?title=%E6%8B%92%E7%B5%95%E6%9C%8D%E5%8B%99%E9%98%BB%E6%96%B7%E6%94%BB%E6%93%8A&amp;action=edit\" title=\"\u62d2\u7d55\u670d\u52d9\u963b\u65b7\u653b\u64ca\">\u62d2\u7d55\u670d\u52d9\u963b\u65b7\u653b\u64ca<\/a>\u7684\u62b5\u6297\u3002\u5373\u4f7f\u4e00\u6574\u7cfb\u5217\u7684\u7bc0\u9ede\u88ab\u58c5\u585e\uff0c\u4e5f\u4e0d\u6703\u5c0d\u7db2\u8def\u53ef\u7528\u5ea6\u9020\u6210\u592a\u591a\u5f71\u97ff\uff0c\u6700\u5f8c\u7db2\u8def\u6703\u900f\u904e\u7e5e\u904e\u9019\u4e9b\u300c\u6d1e\u300d\u800c\u81ea\u6211\u4fee\u5fa9\u3002<\/p>\n<h2><span class=\"mw-headline\">\u5728\u6a94\u6848\u5206\u4eab\u7db2\u8def\u4e2d\u7684\u61c9\u7528<\/span><\/h2>\n<p>Kademlia \u88ab\u7528\u4f86\u9032\u884c\u6a94\u6848\u5206\u4eab\u3002\u900f\u904e\u9032\u884c Kademlia \u95dc\u9375\u5b57\u641c\u5c0b\uff0c\u4efb\u4f55\u4eba\u53ef\u4ee5\u5728\u6a94\u6848\u5206\u4eab\u7db2\u8def\u4e2d\u5c0b\u627e\u8cc7\u6599\u4ee5\u4e0b\u8f09\u6771\u897f\u3002\u7531\u65bc\u6c92\u6709\u4efb\u4f55\u4e2d\u592e\u4f3a\u670d\u5668\u5132\u5b58\u6a94\u6848\u5217\u8868\u7684\u7d22\u5f15\uff0c\u56e0\u6b64\u9019\u9805\u5de5\u4f5c\u662f\u5e73\u5747\u7684\u7531\u6240\u6709\u7684\u5ba2\u6236\u7aef\u64d4\u7576\uff1a\u64c1\u6709\u8981\u5206\u4eab\u7684\u6a94\u6848\u679d\u7bc0\u9ede\uff0c\u6703\u5148\u8655\u7406\u6a94\u6848\u7684\u5167\u5bb9\uff0c\u4e26\u5f9e\u5167\u5bb9\u8a08\u7b97\u51fa\u4e00\u7d44\u6578\u5b57\uff08<span class=\"new\">\u96dc\u6e4a<\/span>\uff09\uff0c \u9019\u7d44\u6578\u5b57\u5c07\u6703\u5728\u6a94\u6848\u5206\u4eab\u7db2\u8def\u4e2d\u8fa8\u8b58\u9019\u500b\u6a94\u6848\u3002\u96dc\u6e4a\u8207\u7bc0\u9ede ID \u7684\u9577\u5ea6\u5fc5\u9808\u76f8\u540c\u3002\u63a5\u8457\u6703\u641c\u5c0b\u5e7e\u500b ID \u8207\u96dc\u6e4a\u76f8\u8fd1\u3001\u4e14\u7bc0\u9ede\u5167\u6709\u5132\u5b58\u8457\u81ea\u5df1 IP \u4f4d\u5740\u7684\u7bc0\u9ede\u3002\u641c\u5c0b\u7684\u5ba2\u6236\u7aef\u6703\u4f7f\u7528 Kademlia \u4f86\u641c\u5c0b\u7db2\u8def\u4e0a\u7bc0\u9edeID\u96e2\u81ea\u5df1\u6700\u8fd1\u8ddd\u96e2\u7684\u7bc0\u9ede\u4f86\u53d6\u5f97\u6a94\u6848\u96dc\u6e4a\uff0c\u7136\u5f8c\u6703\u53d6\u5f97\u5728\u8a72\u7bc0\u9ede\u4e0a\u7684\u806f\u7d61\u6e05\u55ae\u3002 \u7576\u7bc0\u9ede\u806f\u5165\u548c\u806f\u51fa\u6642\uff0c\u9019\u4efd\u5b58\u5132\u5728\u7db2\u8def\u4e0a\u7684\u806f\u7d61\u6e05\u55ae\u4e5f\u5c07\u4fdd\u6301\u4e0d\u8b8a\u3002\u56e0\u70ba\u5167\u5d4c\u7684\u5197\u4f59\u5b58\u5132\u6f14\u7b97\u6cd5\uff0c\u806f\u7e6b\u6e05\u55ae\u5c07\u8907\u88fd\u5728\u591a\u500b\u9ede\u4e0a\u3002<\/p>\n<p>\u6a94\u6848\u96dc\u6e4a\u901a\u5e38\u90fd\u662f\u7531\u5176\u5b83\u5730\u65b9\u7684\u7279\u88fd\u7db2\u969b\u7db2\u8def\u9375\u7d50\u4f86\u53d6\u5f97\uff0c\u6216\u8005\u88ab\u5305\u542b\u5728\u4f86\u81ea\u5176\u5b83\u4f86\u6e90\u4e2d\u7684\u7d22\u5f15\u6a94\u4e2d\u3002<\/p>\n<p class=\"MsoNormal\">\u5c0d\u6a94\u6848\u540d\u7a31\u7684\u641c\u7d22\u662f\u57fa\u65bc\u95dc\u9375\u5b57\u4f86\u5be6\u73fe\u7684\u3002\u6a94\u6848\u540d\u7a31\u88ab\u5206\u6210\u5e7e\u500b\u7d44\u6210\u6a94\u6848\u540d\u7a31\u7684\u55ae\u5b57\u3002 \u6bcf\u500b\u95dc\u9375\u5b57\u90fd\u6703\u88ab<span class=\"new\">\u96dc\u6e4a<\/span>\uff0c \u4e26\u548c\u76f8\u5c0d\u7684\u6a94\u6848\u540d\u7a31\u8207\u6a94\u6848\u96dc\u6e4a\u5229\u7528\u548c\u6a94\u6848\u96dc\u6e4a\u4e00\u6a23\u7684\u65b9\u5f0f\u5132\u5b58\u5230\u7db2\u8def\u4e0a\u3002\u4e00\u500b\u641c\u7d22\u8005\u6703\u9078\u64c7\u5176\u4e2d\u7684\u4e00\u500b\u95dc\u9375\u5b57\uff0c\u806f\u7e6b\u4e0a\u548c\u95dc\u9375\u5b57\u96dc\u6e4a\u6700\u76f8\u8fd1\u7684\u7bc0\u9edeID\uff0c\u7136\u5f8c\u53d6\u5f97 \u542b\u6709\u95dc\u9375\u5b57\u7684\u6a94\u6848\u540d\u7a31\u5217\u3002\u65e2\u7136\u5728\u6a94\u6848\u540d\u7a31\u5217\u4e2d\u7684\u6bcf\u500b\u6a94\u6848\u540d\u7a31\u90fd\u9644\u6709\u81ea\u5df1\u7684\u6e4a\u96dc\uff0c\u90a3\u9ebc\u88ab\u9078\u7684\u6a94\u6848\u5c31\u53ef\u4ee5\u7531\u4e00\u822c\u7684\u65b9\u5f0f\u53d6\u5f97\u3002<span style=\"font-family: \u65b0\u7d30\u660e\u9ad4\"><span><\/p>\n<p> kad <\/span>\u7db2\u7d61\u662f\u4e00\u7a2e\u6839\u672c\u4e0d\u9700\u8981\u670d\u52d9\u5668\u7684\u67b6\u69cb\uff0c\u6bcf\u500b<span>emule<\/span>\u5ba2\u6236\u7aef\u8ca0\u8cac\u8655\u7406\u4e00\u5c0f\u90e8\u5206<span>search<\/span>\u548c<span>source finding<\/span>\u7684\u5de5\u4f5c\u3002\u5206\u914d\u5de5\u4f5c\u7684\u539f\u7406\u662f\u57fa\u65bc\u5ba2\u6236\u7aef\u7684\u552f\u4e00<span>id<\/span>\u548c<span>search<\/span>\u6216\u8005<span>source<\/span>\u7684<span>hash<\/span>\u4e4b\u9593\u7684\u5339\u914d\u4f86\u6c7a\u5b9a\u3002\u6bd4\u5982\u8aaa<span> LordOfRing1.avi<\/span>\u9019\u500b\u6587\u4ef6\u7531\u7528\u6236<span>abc<\/span>\u4f86\u8ca0\u8cac\uff08\u901a\u904e\u6587\u4ef6\u7684<span>hash<\/span>\u6c7a\u5b9a\uff09\uff0c\u5247\u4efb\u4f55\u7528\u6236\u5171\u4eab\u9019\u500b\u6587\u4ef6\u7684\u6642\u5019\u90fd\u6703\u544a\u8a34\u7528\u6236<span>abc<\/span>\u6211\u6709\u9019\u500b\u6587\u4ef6\uff0c \u5176\u4ed6\u7528\u6236\u53bb\u4e0b\u8f09\u9019\u500b\u6587\u4ef6\u7684\u6642\u5019\u4e5f\u6703\u8a62\u554f<span>abc<\/span>\uff0c<span>abc<\/span>\u544a\u8a34\u4ed6\u5011\u8ab0\u6709\u9019\u500b\u6587\u4ef6\uff0c<span>source finding<\/span>\u5c31\u5b8c\u6210\u4e86\u3002<span>search<\/span>\u7684\u65b9\u6cd5\u4e5f\u5dee\u4e0d\u591a\uff0c\u6bcf\u500b\u4eba\u8ca0\u8cac\u4e00\u500b<span>keyword<\/span>\u3002<span> <\/p>\n<p> <\/span>\u81f3\u65bc\u5982\u4f55\u627e\u5230\u7528\u6236<span>abc<\/span>\u5247\u662f\u901a\u904e\u4e00\u7a2e\u5c07\u7528\u6236<span> id<\/span>\u7570\u6216\u7684\u65b9\u5f0f\uff0c\u5169\u500b<span>id<\/span>\u7684\u4e8c\u9032\u5236\u7570\u6216\u503c\u6c7a\u5b9a\u4ed6\u5011\u4e4b\u9593\u7684\u908f\u8f2f\u8ddd\u96e2\uff0c\u6bd4\u5982<span>1100<\/span>\u8ddd\u96e2<span>1101<\/span>\u8981\u6bd4\u8ddd\u96e2<span>1001<\/span>\u8fd1\u3002\u7576\u4e00\u500b\u55b2\u7528\u6236\u52a0\u5165<span>kad<\/span>\u5f8c\uff0c\u9996\u5148\u901a\u904e\u4e00\u500b \u5df2\u77e5\u7684\u7528\u6236\u627e\u5230\u4e00\u6279\u7528\u6236\u7684<span>id<\/span>\u548c<span>ip:port<\/span>\u3002\u7576\u6b64\u7528\u6236<span>A<\/span>\u8981\u5c0b\u627e\u67d0\u7279\u5b9a\u7528\u6236<span>x<\/span>\u6642\uff0c<span>A<\/span>\u5148\u8a62\u554f\u5e7e\u500b\u5df2\u77e5\u7684\u908f\u8f2f\u8ddd\u96e2<span>X<\/span>\u8f03\u8fd1\u7684\u7528\u6236\uff0c\u5982<span>x1,x2,x3<\/span>\uff0c<span>x1, x2,x3<\/span>\u6703\u544a\u8a34<span>A<\/span>\u4ed6\u5011\u77e5\u9053\u7684\u66f4\u52a0\u8fd1\u7684\u7528\u6236\u7684<span>id,ip<\/span>\u548c<span>port<\/span>\uff0c\u4e00\u6b21\u985e\u63a8\uff0c<span>A<\/span>\u6700\u7d42\u5c31\u80fd\u627e\u5230<span>X<\/span>\u3002\u5c0b\u627e\u7684\u6b21\u6578\u61c9\u8a72\u5728<span>logN<\/span>\u6578\u91cf\u7d1a\uff0c<span>N<\/span>\u662f\u7e3d\u4eba\u6578\u3002 <\/span><\/p>\n<p class=\"MsoNormal\"><font size=\"3\"><strong>\u8cc7\u6599\u4f86\u6e90<\/strong><\/font><\/p>\n<pre id=\"line1\"><a href=\"http:\/\/zh.wikipedia.org\/wiki\/%E5%88%86%E6%95%A3%E5%BC%8F%E9%9B%9C%E6%B9%8A%E8%A1%A8\" target=\"_blank\">\u5206\u6563\u5f0f\u96dc\u6e4a\u8868 - Wikipedia<\/a><\/pre>\n<pre id=\"line1\"><a href=\"http:\/\/zh.wikipedia.org\/w\/index.php?title=Kademlia&amp;variant=zh-tw\" target=\"_blank\">Kademlia - Wikipedia <\/a><br \/><\/pre>\n<p><a href=\"http:\/\/board.verycd.com\/t66814.html\" target=\"_blank\">  KAD\u7db2\u7d61\u7684\u4e00\u4e9b\u89e3\u91cb<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5206\u6563\u5f0f\u96dc\u6e4a\u8868\uff08\u82f1\u8a9e\uff1aDistributed Hash Table\uff0c\u7c21\u7a31DHT\uff09\u662f\u5206\u6563\u5f0f\u8a08\u7b97\u7cfb\u7d71\u4e2d\u7684\u4e00\u985e\uff0c\u7528\u4f86\u5c07 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-168","post","type-post","status-publish","format-standard","hentry","category-12"],"_links":{"self":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/168"}],"collection":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=168"}],"version-history":[{"count":0,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/168\/revisions"}],"wp:attachment":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=168"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=168"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}