{"id":3352,"date":"2019-05-28T18:04:48","date_gmt":"2019-05-28T10:04:48","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=3352"},"modified":"2019-05-28T18:04:48","modified_gmt":"2019-05-28T10:04:48","slug":"%e4%b8%80%e8%87%b4%e6%80%a7%e5%93%88%e5%b8%8c%e7%ae%97%e6%b3%95%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/3352","title":{"rendered":"\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\u539f\u7406"},"content":{"rendered":"<div><a href=\"https:\/\/www.cnblogs.com\/lpfuture\/p\/5796398.html\">\u539f\u6587\u5730\u5740<\/a><\/div>\n<div><\/div>\n<div class=\"clear\">\u4e00\u81f4\u6027Hash\u7b97\u6cd5\u80cc\u666f<\/div>\n<div class=\"postBody\">\n<div id=\"cnblogs_post_body\" class=\"blogpost-body\">\n<p>\u3000\u3000\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\u57281997\u5e74\u7531\u9ebb\u7701\u7406\u5de5\u5b66\u9662\u7684Karger\u7b49\u4eba\u5728\u89e3\u51b3\u5206\u5e03\u5f0fCache\u4e2d\u63d0\u51fa\u7684\uff0c\u8bbe\u8ba1\u76ee\u6807\u662f\u4e3a\u4e86\u89e3\u51b3\u56e0\u7279\u7f51\u4e2d\u7684\u70ed\u70b9(Hot spot)\u95ee\u9898\uff0c\u521d\u8877\u548cCARP\u5341\u5206\u7c7b\u4f3c\u3002\u4e00\u81f4\u6027\u54c8\u5e0c\u4fee\u6b63\u4e86CARP\u4f7f\u7528\u7684\u7b80\u5355\u54c8\u5e0c\u7b97\u6cd5\u5e26\u6765\u7684\u95ee\u9898\uff0c\u4f7f\u5f97DHT\u53ef\u4ee5\u5728P2P\u73af\u5883\u4e2d\u771f\u6b63\u5f97\u5230\u5e94\u7528\u3002<\/p>\n<p>\u4f46\u73b0\u5728\u4e00\u81f4\u6027hash\u7b97\u6cd5\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u4e5f\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff0c\u7814\u7a76\u8fc7memcached\u7f13\u5b58\u6570\u636e\u5e93\u7684\u4eba\u90fd\u77e5\u9053\uff0cmemcached\u670d\u52a1\u5668\u7aef\u672c\u8eab\u4e0d\u63d0\u4f9b\u5206\u5e03\u5f0fcache\u7684\u4e00\u81f4\u6027\uff0c\u800c\u662f\u7531\u5ba2\u6237\u7aef\u6765\u63d0\u4f9b\uff0c\u5177\u4f53\u5728\u8ba1\u7b97\u4e00\u81f4\u6027hash\u65f6\u91c7\u7528\u5982\u4e0b\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\u9996\u5148\u6c42\u51famemcached\u670d\u52a1\u5668\uff08\u8282\u70b9\uff09\u7684\u54c8\u5e0c\u503c\uff0c\u5e76\u5c06\u5176\u914d\u7f6e\u52300\uff5e2<sup>32<\/sup>\u7684\u5706\uff08continuum\uff09\u4e0a\u3002<\/li>\n<li>\u7136\u540e\u91c7\u7528\u540c\u6837\u7684\u65b9\u6cd5\u6c42\u51fa\u5b58\u50a8\u6570\u636e\u7684\u952e\u7684\u54c8\u5e0c\u503c\uff0c\u5e76\u6620\u5c04\u5230\u76f8\u540c\u7684\u5706\u4e0a\u3002<\/li>\n<li>\u7136\u540e\u4ece\u6570\u636e\u6620\u5c04\u5230\u7684\u4f4d\u7f6e\u5f00\u59cb\u987a\u65f6\u9488\u67e5\u627e\uff0c\u5c06\u6570\u636e\u4fdd\u5b58\u5230\u627e\u5230\u7684\u7b2c\u4e00\u4e2a\u670d\u52a1\u5668\u4e0a\u3002\u5982\u679c\u8d85\u8fc72<sup>32<\/sup>\u4ecd\u7136\u627e\u4e0d\u5230\u670d\u52a1\u5668\uff0c\u5c31\u4f1a\u4fdd\u5b58\u5230\u7b2c\u4e00\u53f0memcached\u670d\u52a1\u5668\u4e0a\u3002<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/498077\/201608\/498077-20160822172408386-366341651.png\" alt=\"\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>\u4ece\u4e0a\u56fe\u7684\u72b6\u6001\u4e2d\u6dfb\u52a0\u4e00\u53f0memcached\u670d\u52a1\u5668\u3002\u4f59\u6570\u5206\u5e03\u5f0f\u7b97\u6cd5\u7531\u4e8e\u4fdd\u5b58\u952e\u7684\u670d\u52a1\u5668\u4f1a\u53d1\u751f\u5de8\u5927\u53d8\u5316\u800c\u5f71\u54cd\u7f13\u5b58\u7684\u547d\u4e2d\u7387\uff0c\u4f46Consistent Hashing\u4e2d\uff0c\u53ea\u6709\u5728\u56ed\uff08continuum\uff09\u4e0a\u589e\u52a0\u670d\u52a1\u5668\u7684\u5730\u70b9\u9006\u65f6\u9488\u65b9\u5411\u7684\u7b2c\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\u7684\u952e\u4f1a\u53d7\u5230\u5f71\u54cd\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/498077\/201608\/498077-20160822172431933-546286787.png\" alt=\"\" \/><\/p>\n<h2><\/h2>\n<h2>\u4e00\u81f4\u6027Hash\u6027\u8d28<\/h2>\n<p>\u8003\u8651\u5230\u5206\u5e03\u5f0f\u7cfb\u7edf\u6bcf\u4e2a\u8282\u70b9\u90fd\u6709\u53ef\u80fd\u5931\u6548\uff0c\u5e76\u4e14\u65b0\u7684\u8282\u70b9\u5f88\u53ef\u80fd\u52a8\u6001\u7684\u589e\u52a0\u8fdb\u6765\uff0c\u5982\u4f55\u4fdd\u8bc1\u5f53\u7cfb\u7edf\u7684\u8282\u70b9\u6570\u76ee\u53d1\u751f\u53d8\u5316\u65f6\u4ecd\u7136\u80fd\u591f\u5bf9\u5916\u63d0\u4f9b\u826f\u597d\u7684\u670d\u52a1\uff0c\u8fd9\u662f\u503c\u5f97\u8003\u8651\u7684\uff0c\u5c24\u5176\u5b9e\u5728\u8bbe\u8ba1\u5206\u5e03\u5f0f\u7f13\u5b58\u7cfb\u7edf\u65f6\uff0c\u5982\u679c\u67d0\u53f0\u670d\u52a1\u5668\u5931\u6548\uff0c\u5bf9\u4e8e\u6574\u4e2a\u7cfb\u7edf\u6765\u8bf4\u5982\u679c\u4e0d\u91c7\u7528\u5408\u9002\u7684\u7b97\u6cd5\u6765\u4fdd\u8bc1\u4e00\u81f4\u6027\uff0c\u90a3\u4e48\u7f13\u5b58\u4e8e\u7cfb\u7edf\u4e2d\u7684\u6240\u6709\u6570\u636e\u90fd\u53ef\u80fd\u4f1a\u5931\u6548\uff08\u5373\u7531\u4e8e\u7cfb\u7edf\u8282\u70b9\u6570\u76ee\u53d8\u5c11\uff0c\u5ba2\u6237\u7aef\u5728\u8bf7\u6c42\u67d0\u4e00\u5bf9\u8c61\u65f6\u9700\u8981\u91cd\u65b0\u8ba1\u7b97\u5176hash\u503c\uff08\u901a\u5e38\u4e0e\u7cfb\u7edf\u4e2d\u7684\u8282\u70b9\u6570\u76ee\u6709\u5173\uff09\uff0c\u7531\u4e8ehash\u503c\u5df2\u7ecf\u6539\u53d8\uff0c\u6240\u4ee5\u5f88\u53ef\u80fd\u627e\u4e0d\u5230\u4fdd\u5b58\u8be5\u5bf9\u8c61\u7684\u670d\u52a1\u5668\u8282\u70b9\uff09\uff0c\u56e0\u6b64\u4e00\u81f4\u6027hash\u5c31\u663e\u5f97\u81f3\u5173\u91cd\u8981\uff0c\u826f\u597d\u7684\u5206\u5e03\u5f0fcahce\u7cfb\u7edf\u4e2d\u7684\u4e00\u81f4\u6027hash\u7b97\u6cd5\u5e94\u8be5\u6ee1\u8db3\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u5e73\u8861\u6027(Balance)<\/strong><\/li>\n<\/ul>\n<p>\u5e73\u8861\u6027\u662f\u6307\u54c8\u5e0c\u7684\u7ed3\u679c\u80fd\u591f\u5c3d\u53ef\u80fd\u5206\u5e03\u5230\u6240\u6709\u7684\u7f13\u51b2\u4e2d\u53bb\uff0c\u8fd9\u6837\u53ef\u4ee5\u4f7f\u5f97\u6240\u6709\u7684\u7f13\u51b2\u7a7a\u95f4\u90fd\u5f97\u5230\u5229\u7528\u3002\u5f88\u591a\u54c8\u5e0c\u7b97\u6cd5\u90fd\u80fd\u591f\u6ee1\u8db3\u8fd9\u4e00\u6761\u4ef6\u3002<\/p>\n<ul>\n<li><strong>\u5355\u8c03\u6027(Monotonicity)<\/strong><\/li>\n<\/ul>\n<p>\u5355\u8c03\u6027\u662f\u6307\u5982\u679c\u5df2\u7ecf\u6709\u4e00\u4e9b\u5185\u5bb9\u901a\u8fc7\u54c8\u5e0c\u5206\u6d3e\u5230\u4e86\u76f8\u5e94\u7684\u7f13\u51b2\u4e2d\uff0c\u53c8\u6709\u65b0\u7684\u7f13\u51b2\u533a\u52a0\u5165\u5230\u7cfb\u7edf\u4e2d\uff0c\u90a3\u4e48\u54c8\u5e0c\u7684\u7ed3\u679c\u5e94\u80fd\u591f\u4fdd\u8bc1\u539f\u6709\u5df2\u5206\u914d\u7684\u5185\u5bb9\u53ef\u4ee5\u88ab\u6620\u5c04\u5230\u65b0\u7684\u7f13\u51b2\u533a\u4e2d\u53bb\uff0c\u800c\u4e0d\u4f1a\u88ab\u6620\u5c04\u5230\u65e7\u7684\u7f13\u51b2\u96c6\u5408\u4e2d\u7684\u5176\u4ed6\u7f13\u51b2\u533a\u3002\u7b80\u5355\u7684\u54c8\u5e0c\u7b97\u6cd5\u5f80\u5f80\u4e0d\u80fd\u6ee1\u8db3\u5355\u8c03\u6027\u7684\u8981\u6c42\uff0c\u5982\u6700\u7b80\u5355\u7684\u7ebf\u6027\u54c8\u5e0c\uff1ax = (ax + b) mod (P)\uff0c\u5728\u4e0a\u5f0f\u4e2d\uff0cP\u8868\u793a\u5168\u90e8\u7f13\u51b2\u7684\u5927\u5c0f\u3002\u4e0d\u96be\u770b\u51fa\uff0c\u5f53\u7f13\u51b2\u5927\u5c0f\u53d1\u751f\u53d8\u5316\u65f6(\u4eceP1\u5230P2)\uff0c\u539f\u6765\u6240\u6709\u7684\u54c8\u5e0c\u7ed3\u679c\u5747\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u4ece\u800c\u4e0d\u6ee1\u8db3\u5355\u8c03\u6027\u7684\u8981\u6c42\u3002\u54c8\u5e0c\u7ed3\u679c\u7684\u53d8\u5316\u610f\u5473\u7740\u5f53\u7f13\u51b2\u7a7a\u95f4\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u6240\u6709\u7684\u6620\u5c04\u5173\u7cfb\u9700\u8981\u5728\u7cfb\u7edf\u5185\u5168\u90e8\u66f4\u65b0\u3002\u800c\u5728P2P\u7cfb\u7edf\u5185\uff0c\u7f13\u51b2\u7684\u53d8\u5316\u7b49\u4ef7\u4e8ePeer\u52a0\u5165\u6216\u9000\u51fa\u7cfb\u7edf\uff0c\u8fd9\u4e00\u60c5\u51b5\u5728P2P\u7cfb\u7edf\u4e2d\u4f1a\u9891\u7e41\u53d1\u751f\uff0c\u56e0\u6b64\u4f1a\u5e26\u6765\u6781\u5927\u8ba1\u7b97\u548c\u4f20\u8f93\u8d1f\u8377\u3002\u5355\u8c03\u6027\u5c31\u662f\u8981\u6c42\u54c8\u5e0c\u7b97\u6cd5\u80fd\u591f\u5e94\u5bf9\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n<ul>\n<li><strong>\u5206\u6563\u6027(Spread)<\/strong><\/li>\n<\/ul>\n<p>\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\uff0c\u7ec8\u7aef\u6709\u53ef\u80fd\u770b\u4e0d\u5230\u6240\u6709\u7684\u7f13\u51b2\uff0c\u800c\u662f\u53ea\u80fd\u770b\u5230\u5176\u4e2d\u7684\u4e00\u90e8\u5206\u3002\u5f53\u7ec8\u7aef\u5e0c\u671b\u901a\u8fc7\u54c8\u5e0c\u8fc7\u7a0b\u5c06\u5185\u5bb9\u6620\u5c04\u5230\u7f13\u51b2\u4e0a\u65f6\uff0c\u7531\u4e8e\u4e0d\u540c\u7ec8\u7aef\u6240\u89c1\u7684\u7f13\u51b2\u8303\u56f4\u6709\u53ef\u80fd\u4e0d\u540c\uff0c\u4ece\u800c\u5bfc\u81f4\u54c8\u5e0c\u7684\u7ed3\u679c\u4e0d\u4e00\u81f4\uff0c\u6700\u7ec8\u7684\u7ed3\u679c\u662f\u76f8\u540c\u7684\u5185\u5bb9\u88ab\u4e0d\u540c\u7684\u7ec8\u7aef\u6620\u5c04\u5230\u4e0d\u540c\u7684\u7f13\u51b2\u533a\u4e2d\u3002\u8fd9\u79cd\u60c5\u51b5\u663e\u7136\u662f\u5e94\u8be5\u907f\u514d\u7684\uff0c\u56e0\u4e3a\u5b83\u5bfc\u81f4\u76f8\u540c\u5185\u5bb9\u88ab\u5b58\u50a8\u5230\u4e0d\u540c\u7f13\u51b2\u4e2d\u53bb\uff0c\u964d\u4f4e\u4e86\u7cfb\u7edf\u5b58\u50a8\u7684\u6548\u7387\u3002\u5206\u6563\u6027\u7684\u5b9a\u4e49\u5c31\u662f\u4e0a\u8ff0\u60c5\u51b5\u53d1\u751f\u7684\u4e25\u91cd\u7a0b\u5ea6\u3002\u597d\u7684\u54c8\u5e0c\u7b97\u6cd5\u5e94\u80fd\u591f\u5c3d\u91cf\u907f\u514d\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\u53d1\u751f\uff0c\u4e5f\u5c31\u662f\u5c3d\u91cf\u964d\u4f4e\u5206\u6563\u6027\u3002<\/p>\n<ul>\n<li><strong>\u8d1f\u8f7d(Load)<\/strong><\/li>\n<\/ul>\n<p>\u8d1f\u8f7d\u95ee\u9898\u5b9e\u9645\u4e0a\u662f\u4ece\u53e6\u4e00\u4e2a\u89d2\u5ea6\u770b\u5f85\u5206\u6563\u6027\u95ee\u9898\u3002\u65e2\u7136\u4e0d\u540c\u7684\u7ec8\u7aef\u53ef\u80fd\u5c06\u76f8\u540c\u7684\u5185\u5bb9\u6620\u5c04\u5230\u4e0d\u540c\u7684\u7f13\u51b2\u533a\u4e2d\uff0c\u90a3\u4e48\u5bf9\u4e8e\u4e00\u4e2a\u7279\u5b9a\u7684\u7f13\u51b2\u533a\u800c\u8a00\uff0c\u4e5f\u53ef\u80fd\u88ab\u4e0d\u540c\u7684\u7528\u6237\u6620\u5c04\u4e3a\u4e0d\u540c\u7684\u5185\u5bb9\u3002\u4e0e\u5206\u6563\u6027\u4e00\u6837\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e5f\u662f\u5e94\u5f53\u907f\u514d\u7684\uff0c\u56e0\u6b64\u597d\u7684\u54c8\u5e0c\u7b97\u6cd5\u5e94\u80fd\u591f\u5c3d\u91cf\u964d\u4f4e\u7f13\u51b2\u7684\u8d1f\u8377\u3002<\/p>\n<ul>\n<li><strong>\u5e73\u6ed1\u6027(Smoothness)<\/strong><\/li>\n<\/ul>\n<p>\u5e73\u6ed1\u6027\u662f\u6307\u7f13\u5b58\u670d\u52a1\u5668\u7684\u6570\u76ee\u5e73\u6ed1\u6539\u53d8\u548c\u7f13\u5b58\u5bf9\u8c61\u7684\u5e73\u6ed1\u6539\u53d8\u662f\u4e00\u81f4\u7684\u3002<\/p>\n<h2>\u539f\u7406<\/h2>\n<h3>\u57fa\u672c\u6982\u5ff5<\/h3>\n<p>\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\uff08Consistent Hashing\uff09\u6700\u65e9\u5728\u8bba\u6587\u300a<a href=\"http:\/\/dl.acm.org\/citation.cfm?id=258660\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Consistent Hashing and Random Trees: Distributed Caching Protocols for Relieving Hot Spots on the World Wide Web<\/a>\u300b\u4e2d\u88ab\u63d0\u51fa\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u4e00\u81f4\u6027\u54c8\u5e0c\u5c06\u6574\u4e2a\u54c8\u5e0c\u503c\u7a7a\u95f4\u7ec4\u7ec7\u6210\u4e00\u4e2a\u865a\u62df\u7684\u5706\u73af\uff0c\u5982\u5047\u8bbe\u67d0\u54c8\u5e0c\u51fd\u6570H\u7684\u503c\u7a7a\u95f4\u4e3a0-2^<sup>32<\/sup>-1\uff08\u5373\u54c8\u5e0c\u503c\u662f\u4e00\u4e2a32\u4f4d\u65e0\u7b26\u53f7\u6574\u5f62\uff09\uff0c\u6574\u4e2a\u54c8\u5e0c\u7a7a\u95f4\u73af\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/498077\/201608\/498077-20160822172453355-790656043.png\" alt=\"\" \/><\/p>\n<p>\u6574\u4e2a\u7a7a\u95f4\u6309\u987a\u65f6\u9488\u65b9\u5411\u7ec4\u7ec7\u30020\u548c2<sup>32<\/sup>-1\u5728\u96f6\u70b9\u4e2d\u65b9\u5411\u91cd\u5408\u3002<\/p>\n<p>\u4e0b\u4e00\u6b65\u5c06\u5404\u4e2a\u670d\u52a1\u5668\u4f7f\u7528Hash\u8fdb\u884c\u4e00\u4e2a\u54c8\u5e0c\uff0c\u5177\u4f53\u53ef\u4ee5\u9009\u62e9\u670d\u52a1\u5668\u7684ip\u6216\u4e3b\u673a\u540d\u4f5c\u4e3a\u5173\u952e\u5b57\u8fdb\u884c\u54c8\u5e0c\uff0c\u8fd9\u6837\u6bcf\u53f0\u673a\u5668\u5c31\u80fd\u786e\u5b9a\u5176\u5728\u54c8\u5e0c\u73af\u4e0a\u7684\u4f4d\u7f6e\uff0c\u8fd9\u91cc\u5047\u8bbe\u5c06\u4e0a\u6587\u4e2d\u56db\u53f0\u670d\u52a1\u5668\u4f7f\u7528ip\u5730\u5740\u54c8\u5e0c\u540e\u5728\u73af\u7a7a\u95f4\u7684\u4f4d\u7f6e\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/498077\/201608\/498077-20160822172523808-1567363338.png\" alt=\"\" \/><\/p>\n<p>\u63a5\u4e0b\u6765\u4f7f\u7528\u5982\u4e0b\u7b97\u6cd5\u5b9a\u4f4d\u6570\u636e\u8bbf\u95ee\u5230\u76f8\u5e94\u670d\u52a1\u5668\uff1a\u5c06\u6570\u636ekey\u4f7f\u7528\u76f8\u540c\u7684\u51fd\u6570Hash\u8ba1\u7b97\u51fa\u54c8\u5e0c\u503c\uff0c\u5e76\u786e\u5b9a\u6b64\u6570\u636e\u5728\u73af\u4e0a\u7684\u4f4d\u7f6e\uff0c\u4ece\u6b64\u4f4d\u7f6e\u6cbf\u73af\u987a\u65f6\u9488\u201c\u884c\u8d70\u201d\uff0c\u7b2c\u4e00\u53f0\u9047\u5230\u7684\u670d\u52a1\u5668\u5c31\u662f\u5176\u5e94\u8be5\u5b9a\u4f4d\u5230\u7684\u670d\u52a1\u5668\u3002<\/p>\n<p>\u4f8b\u5982\u6211\u4eec\u6709Object A\u3001Object B\u3001Object C\u3001Object D\u56db\u4e2a\u6570\u636e\u5bf9\u8c61\uff0c\u7ecf\u8fc7\u54c8\u5e0c\u8ba1\u7b97\u540e\uff0c\u5728\u73af\u7a7a\u95f4\u4e0a\u7684\u4f4d\u7f6e\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/498077\/201608\/498077-20160822172807745-742859090.png\" alt=\"\" \/><\/p>\n<p>\u6839\u636e\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\uff0c\u6570\u636eA\u4f1a\u88ab\u5b9a\u4e3a\u5230Node A\u4e0a\uff0cB\u88ab\u5b9a\u4e3a\u5230Node B\u4e0a\uff0cC\u88ab\u5b9a\u4e3a\u5230Node C\u4e0a\uff0cD\u88ab\u5b9a\u4e3a\u5230Node D\u4e0a\u3002<\/p>\n<p>\u4e0b\u9762\u5206\u6790\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\u7684\u5bb9\u9519\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002\u73b0\u5047\u8bbeNode C\u4e0d\u5e78\u5b95\u673a\uff0c\u53ef\u4ee5\u770b\u5230\u6b64\u65f6\u5bf9\u8c61A\u3001B\u3001D\u4e0d\u4f1a\u53d7\u5230\u5f71\u54cd\uff0c\u53ea\u6709C\u5bf9\u8c61\u88ab\u91cd\u5b9a\u4f4d\u5230Node D\u3002\u4e00\u822c\u7684\uff0c\u5728\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\u4e2d\uff0c\u5982\u679c\u4e00\u53f0\u670d\u52a1\u5668\u4e0d\u53ef\u7528\uff0c\u5219\u53d7\u5f71\u54cd\u7684\u6570\u636e\u4ec5\u4ec5\u662f\u6b64\u670d\u52a1\u5668\u5230\u5176\u73af\u7a7a\u95f4\u4e2d\u524d\u4e00\u53f0\u670d\u52a1\u5668\uff08\u5373\u6cbf\u7740\u9006\u65f6\u9488\u65b9\u5411\u884c\u8d70\u9047\u5230\u7684\u7b2c\u4e00\u53f0\u670d\u52a1\u5668\uff09\u4e4b\u95f4\u6570\u636e\uff0c\u5176\u5b83\u4e0d\u4f1a\u53d7\u5230\u5f71\u54cd\u3002<\/p>\n<p>\u4e0b\u9762\u8003\u8651\u53e6\u5916\u4e00\u79cd\u60c5\u51b5\uff0c\u5982\u679c\u5728\u7cfb\u7edf\u4e2d\u589e\u52a0\u4e00\u53f0\u670d\u52a1\u5668Node X\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/498077\/201608\/498077-20160822172901526-169091807.png\" alt=\"\" \/><\/p>\n<p>\u6b64\u65f6\u5bf9\u8c61Object A\u3001B\u3001D\u4e0d\u53d7\u5f71\u54cd\uff0c\u53ea\u6709\u5bf9\u8c61C\u9700\u8981\u91cd\u5b9a\u4f4d\u5230\u65b0\u7684Node X \u3002\u4e00\u822c\u7684\uff0c\u5728\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\u4e2d\uff0c\u5982\u679c\u589e\u52a0\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u5219\u53d7\u5f71\u54cd\u7684\u6570\u636e\u4ec5\u4ec5\u662f\u65b0\u670d\u52a1\u5668\u5230\u5176\u73af\u7a7a\u95f4\u4e2d\u524d\u4e00\u53f0\u670d\u52a1\u5668\uff08\u5373\u6cbf\u7740\u9006\u65f6\u9488\u65b9\u5411\u884c\u8d70\u9047\u5230\u7684\u7b2c\u4e00\u53f0\u670d\u52a1\u5668\uff09\u4e4b\u95f4\u6570\u636e\uff0c\u5176\u5b83\u6570\u636e\u4e5f\u4e0d\u4f1a\u53d7\u5230\u5f71\u54cd\u3002<\/p>\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\u5bf9\u4e8e\u8282\u70b9\u7684\u589e\u51cf\u90fd\u53ea\u9700\u91cd\u5b9a\u4f4d\u73af\u7a7a\u95f4\u4e2d\u7684\u4e00\u5c0f\u90e8\u5206\u6570\u636e\uff0c\u5177\u6709\u8f83\u597d\u7684\u5bb9\u9519\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u4e00\u81f4\u6027\u54c8\u5e0c\u7b97\u6cd5\u5728\u670d\u52a1\u8282\u70b9\u592a\u5c11\u65f6\uff0c\u5bb9\u6613\u56e0\u4e3a\u8282\u70b9\u5206\u90e8\u4e0d\u5747\u5300\u800c\u9020\u6210\u6570\u636e\u503e\u659c\u95ee\u9898\u3002\u4f8b\u5982\u7cfb\u7edf\u4e2d\u53ea\u6709\u4e24\u53f0\u670d\u52a1\u5668\uff0c\u5176\u73af\u5206\u5e03\u5982\u4e0b\uff0c<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/498077\/201608\/498077-20160822172922917-1331181630.png\" alt=\"\" \/><\/p>\n<p>\u6b64\u65f6\u5fc5\u7136\u9020\u6210\u5927\u91cf\u6570\u636e\u96c6\u4e2d\u5230Node A\u4e0a\uff0c\u800c\u53ea\u6709\u6781\u5c11\u91cf\u4f1a\u5b9a\u4f4d\u5230Node 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