{"id":3354,"date":"2019-05-28T18:12:05","date_gmt":"2019-05-28T10:12:05","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=3354"},"modified":"2019-05-28T18:12:05","modified_gmt":"2019-05-28T10:12:05","slug":"%e6%b7%b1%e5%85%a5%e6%b5%85%e5%87%ba%e4%b8%80%e8%87%b4%e6%80%a7hash%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/3354","title":{"rendered":"\u6df1\u5165\u6d45\u51fa\u4e00\u81f4\u6027Hash\u539f\u7406"},"content":{"rendered":"
\n
\u539f\u6587\u5730\u5740<\/a><\/div>\n
\n
2018.04.05 14:31*<\/span>\u00a0\u5b57\u6570 1816<\/span>\u00a0\u9605\u8bfb 15273<\/span>\u8bc4\u8bba 7<\/span>\u559c\u6b22 105<\/span><\/div>\n<\/div>\n<\/div>\n
\n
\n

\u4e00\u3001\u524d\u8a00<\/h1>\n

\u5728\u89e3\u51b3\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u8d1f\u8f7d\u5747\u8861\u7684\u95ee\u9898\u65f6\u5019\u53ef\u4ee5\u4f7f\u7528Hash\u7b97\u6cd5\u8ba9\u56fa\u5b9a\u7684\u4e00\u90e8\u5206\u8bf7\u6c42\u843d\u5230\u540c\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\uff0c\u8fd9\u6837\u6bcf\u53f0\u670d\u52a1\u5668\u56fa\u5b9a\u5904\u7406\u4e00\u90e8\u5206\u8bf7\u6c42\uff08\u5e76\u7ef4\u62a4\u8fd9\u4e9b\u8bf7\u6c42\u7684\u4fe1\u606f\uff09\uff0c\u8d77\u5230\u8d1f\u8f7d\u5747\u8861\u7684\u4f5c\u7528\u3002<\/p>\n

\u4f46\u662f\u666e\u901a\u7684\u4f59\u6570hash\uff08hash(\u6bd4\u5982\u7528\u6237id)%\u670d\u52a1\u5668\u673a\u5668\u6570\uff09\u7b97\u6cd5\u4f38\u7f29\u6027\u5f88\u5dee\uff0c\u5f53\u65b0\u589e\u6216\u8005\u4e0b\u7ebf\u670d\u52a1\u5668\u673a\u5668\u65f6\u5019\uff0c\u7528\u6237id\u4e0e\u670d\u52a1\u5668\u7684\u6620\u5c04\u5173\u7cfb\u4f1a\u5927\u91cf\u5931\u6548\u3002\u4e00\u81f4\u6027hash\u5219\u5229\u7528hash\u73af\u5bf9\u5176\u8fdb\u884c\u4e86\u6539\u8fdb\u3002<\/p>\n

\u4e8c\u3001\u4e00\u81f4\u6027Hash\u6982\u8ff0<\/h1>\n

\u4e3a\u4e86\u80fd\u76f4\u89c2\u7684\u7406\u89e3\u4e00\u81f4\u6027hash\u539f\u7406\uff0c\u8fd9\u91cc\u7ed3\u5408\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u6765\u8bb2\u89e3\uff0c\u5047\u8bbe\u67094\u53f0\u670d\u52a1\u5668\uff0c\u5730\u5740\u4e3aip1,ip2,ip3,ip4\u3002<\/p>\n

    \n
  • \u4e00\u81f4\u6027hash\u662f\u9996\u5148\u8ba1\u7b97\u56db\u4e2aip\u5730\u5740\u5bf9\u5e94\u7684hash\u503c
    \nhash(ip1),hash(ip2),hash(ip3),hash(ip3)\uff0c\u8ba1\u7b97\u51fa\u6765\u7684hash\u503c\u662f0~\u6700\u5927\u6b63\u6574\u6570\u76f4\u63a5\u7684\u4e00\u4e2a\u503c\uff0c\u8fd9\u56db\u4e2a\u503c\u5728\u4e00\u81f4\u6027hash\u73af\u4e0a\u5448\u73b0\u5982\u4e0b\u56fe\uff1a<\/p>\n
    \n
    \n
    <\/div>\n
    <\/div>\n<\/div>\n
    image.png<\/div>\n<\/div>\n<\/li>\n
  • hash\u73af\u4e0a\u987a\u65f6\u9488\u4ece\u6574\u65700\u5f00\u59cb\uff0c\u4e00\u76f4\u5230\u6700\u5927\u6b63\u6574\u6570\uff0c\u6211\u4eec\u6839\u636e\u56db\u4e2aip\u8ba1\u7b97\u7684hash\u503c\u80af\u5b9a\u4f1a\u843d\u5230\u8fd9\u4e2ahash\u73af\u4e0a\u7684\u67d0\u4e00\u4e2a\u70b9\uff0c\u81f3\u6b64\u6211\u4eec\u628a\u670d\u52a1\u5668\u7684\u56db\u4e2aip\u6620\u5c04\u5230\u4e86\u4e00\u81f4\u6027hash\u73af<\/li>\n
  • \u5f53\u7528\u6237\u5728\u5ba2\u6237\u7aef\u8fdb\u884c\u8bf7\u6c42\u65f6\u5019\uff0c\u9996\u5148\u6839\u636ehash(\u7528\u6237id)\u8ba1\u7b97\u8def\u7531\u89c4\u5219\uff08hash\u503c\uff09\uff0c\u7136\u540e\u770bhash\u503c\u843d\u5230\u4e86hash\u73af\u7684\u90a3\u4e2a\u5730\u65b9\uff0c\u6839\u636ehash\u503c\u5728hash\u73af\u4e0a\u7684\u4f4d\u7f6e\u987a\u65f6\u9488\u627e\u8ddd\u79bb\u6700\u8fd1\u7684ip\u4f5c\u4e3a\u8def\u7531ip.\n
    \n
    \n
    <\/div>\n
    <\/div>\n<\/div>\n
    image.png<\/div>\n<\/div>\n<\/li>\n<\/ul>\n

    \u5982\u4e0a\u56fe\u53ef\u77e5user1,user2\u7684\u8bf7\u6c42\u4f1a\u843d\u5230\u670d\u52a1\u5668ip2\u8fdb\u884c\u5904\u7406\uff0cUser3\u7684\u8bf7\u6c42\u4f1a\u843d\u5230\u670d\u52a1\u5668ip3\u8fdb\u884c\u5904\u7406\uff0cuser4\u7684\u8bf7\u6c42\u4f1a\u843d\u5230\u670d\u52a1\u5668ip4\u8fdb\u884c\u5904\u7406\uff0cuser5,user6\u7684\u8bf7\u6c42\u4f1a\u843d\u5230\u670d\u52a1\u5668ip1\u8fdb\u884c\u5904\u7406\u3002<\/p>\n

    \u4e0b\u9762\u8003\u8651\u5f53ip2\u7684\u670d\u52a1\u5668\u6302\u4e86\u7684\u65f6\u5019\u4f1a\u51fa\u73b0\u4ec0\u4e48\u60c5\u51b5\uff1f
    \n\u5f53ip2\u7684\u670d\u52a1\u5668\u6302\u4e86\u7684\u65f6\u5019\uff0c\u4e00\u81f4\u6027hash\u73af\u5927\u81f4\u5982\u4e0b\u56fe\uff1a<\/p>\n

    \n
    \n
    <\/div>\n
    <\/div>\n<\/div>\n
    image.png<\/div>\n<\/div>\n

    \u6839\u636e\u987a\u65f6\u9488\u89c4\u5219\u53ef\u77e5user1,user2\u7684\u8bf7\u6c42\u4f1a\u88ab\u670d\u52a1\u5668ip3\u8fdb\u884c\u5904\u7406\uff0c\u800c\u5176\u5b83\u7528\u6237\u7684\u8bf7\u6c42\u5bf9\u5e94\u7684\u5904\u7406\u670d\u52a1\u5668\u4e0d\u53d8\uff0c\u4e5f\u5c31\u662f\u53ea\u6709\u4e4b\u524d\u88abip2\u5904\u7406\u7684\u4e00\u90e8\u5206\u7528\u6237\u7684\u6620\u5c04\u5173\u7cfb\u88ab\u7834\u574f\u4e86\uff0c\u5e76\u4e14\u5176\u8d1f\u8d23\u5904\u7406\u7684\u8bf7\u6c42\u88ab\u987a\u65f6\u9488\u4e0b\u4e00\u4e2a\u8282\u70b9\u59d4\u6258\u5904\u7406\u3002<\/p>\n

    \u4e0b\u9762\u8003\u8651\u5f53\u65b0\u589e\u673a\u5668\u7684\u65f6\u5019\u4f1a\u51fa\u73b0\u4ec0\u4e48\u60c5\u51b5\uff1f
    \n\u5f53\u65b0\u589e\u4e00\u4e2aip5\u7684\u670d\u52a1\u5668\u540e\uff0c\u4e00\u81f4\u6027hash\u73af\u5927\u81f4\u5982\u4e0b\u56fe\uff1a<\/p>\n

    \n
    \n
    <\/div>\n
    <\/div>\n<\/div>\n
    image.png<\/div>\n<\/div>\n

    \u6839\u636e\u987a\u65f6\u9488\u89c4\u5219\u53ef\u77e5\u4e4b\u524duser1\u7684\u8bf7\u6c42\u5e94\u8be5\u88abip1\u670d\u52a1\u5668\u5904\u7406\uff0c\u73b0\u5728\u88ab\u65b0\u589e\u7684ip5\u670d\u52a1\u5668\u5904\u7406\uff0c\u5176\u4ed6\u7528\u6237\u7684\u8bf7\u6c42\u5904\u7406\u670d\u52a1\u5668\u4e0d\u53d8\uff0c\u4e5f\u5c31\u662f\u65b0\u589e\u7684\u670d\u52a1\u5668\u987a\u65f6\u9488\u6700\u8fd1\u7684\u670d\u52a1\u5668\u7684\u4e00\u90e8\u5206\u8bf7\u6c42\u4f1a\u88ab\u65b0\u589e\u7684\u670d\u52a1\u5668\u6240\u66ff\u4ee3\u3002<\/p>\n

    \u4e09\u3001\u4e00\u81f4\u6027hash\u7684\u7279\u6027<\/h1>\n
      \n
    • \u5355\u8c03\u6027(Monotonicity)\uff0c\u5355\u8c03\u6027\u662f\u6307\u5982\u679c\u5df2\u7ecf\u6709\u4e00\u4e9b\u8bf7\u6c42\u901a\u8fc7\u54c8\u5e0c\u5206\u6d3e\u5230\u4e86\u76f8\u5e94\u7684\u670d\u52a1\u5668\u8fdb\u884c\u5904\u7406\uff0c\u53c8\u6709\u65b0\u7684\u670d\u52a1\u5668\u52a0\u5165\u5230\u7cfb\u7edf\u4e2d\u65f6\u5019\uff0c\u5e94\u4fdd\u8bc1\u539f\u6709\u7684\u8bf7\u6c42\u53ef\u4ee5\u88ab\u6620\u5c04\u5230\u539f\u6709\u7684\u6216\u8005\u65b0\u7684\u670d\u52a1\u5668\u4e2d\u53bb\uff0c\u800c\u4e0d\u4f1a\u88ab\u6620\u5c04\u5230\u539f\u6765\u7684\u5176\u5b83\u670d\u52a1\u5668\u4e0a\u53bb\u3002 \u8fd9\u4e2a\u901a\u8fc7\u4e0a\u9762\u65b0\u589e\u670d\u52a1\u5668ip5\u53ef\u4ee5\u8bc1\u660e\uff0c\u65b0\u589eip5\u540e\uff0c\u539f\u6765\u88abip1\u5904\u7406\u7684user6\u73b0\u5728\u8fd8\u662f\u88abip1\u5904\u7406\uff0c\u539f\u6765\u88abip1\u5904\u7406\u7684user5\u73b0\u5728\u88ab\u65b0\u589e\u7684ip5\u5904\u7406\u3002<\/li>\n
    • \u5206\u6563\u6027(Spread)\uff1a\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\uff0c\u5ba2\u6237\u7aef\u8bf7\u6c42\u65f6\u5019\u53ef\u80fd\u4e0d\u77e5\u9053\u6240\u6709\u670d\u52a1\u5668\u7684\u5b58\u5728\uff0c\u53ef\u80fd\u53ea\u77e5\u9053\u5176\u4e2d\u4e00\u90e8\u5206\u670d\u52a1\u5668\uff0c\u5728\u5ba2\u6237\u7aef\u770b\u6765\u4ed6\u770b\u5230\u7684\u90e8\u5206\u670d\u52a1\u5668\u4f1a\u5f62\u6210\u4e00\u4e2a\u5b8c\u6574\u7684hash\u73af\u3002\u5982\u679c\u591a\u4e2a\u5ba2\u6237\u7aef\u90fd\u628a\u90e8\u5206\u670d\u52a1\u5668\u4f5c\u4e3a\u4e00\u4e2a\u5b8c\u6574hash\u73af\uff0c\u90a3\u4e48\u53ef\u80fd\u4f1a\u5bfc\u81f4\uff0c\u540c\u4e00\u4e2a\u7528\u6237\u7684\u8bf7\u6c42\u88ab\u8def\u7531\u5230\u4e0d\u540c\u7684\u670d\u52a1\u5668\u8fdb\u884c\u5904\u7406\u3002\u8fd9\u79cd\u60c5\u51b5\u663e\u7136\u662f\u5e94\u8be5\u907f\u514d\u7684\uff0c\u56e0\u4e3a\u5b83\u4e0d\u80fd\u4fdd\u8bc1\u540c\u4e00\u4e2a\u7528\u6237\u7684\u8bf7\u6c42\u843d\u5230\u540c\u4e00\u4e2a\u670d\u52a1\u5668\u3002\u6240\u8c13\u5206\u6563\u6027\u662f\u6307\u4e0a\u8ff0\u60c5\u51b5\u53d1\u751f\u7684\u4e25\u91cd\u7a0b\u5ea6\u3002\u597d\u7684\u54c8\u5e0c\u7b97\u6cd5\u5e94\u5c3d\u91cf\u907f\u514d\u5c3d\u91cf\u964d\u4f4e\u5206\u6563\u6027\u3002 \u4e00\u81f4\u6027hash\u5177\u6709\u5f88\u4f4e\u7684\u5206\u6563\u6027<\/li>\n
    • \u5e73\u8861\u6027(Balance)\uff1a\u5e73\u8861\u6027\u4e5f\u5c31\u662f\u8bf4\u8d1f\u8f7d\u5747\u8861\uff0c\u662f\u6307\u5ba2\u6237\u7aefhash\u540e\u7684\u8bf7\u6c42\u5e94\u8be5\u80fd\u591f\u5206\u6563\u5230\u4e0d\u540c\u7684\u670d\u52a1\u5668\u4e0a\u53bb\u3002\u4e00\u81f4\u6027hash\u53ef\u4ee5\u505a\u5230\u6bcf\u4e2a\u670d\u52a1\u5668\u90fd\u8fdb\u884c\u5904\u7406\u8bf7\u6c42\uff0c\u4f46\u662f\u4e0d\u80fd\u4fdd\u8bc1\u6bcf\u4e2a\u670d\u52a1\u5668\u5904\u7406\u7684\u8bf7\u6c42\u7684\u6570\u91cf\u5927\u81f4\u76f8\u540c\uff0c\u5982\u4e0b\u56fe\n
      \n
      \n
      <\/div>\n
      <\/div>\n<\/div>\n<\/div>\n<\/li>\n<\/ul>\n

      \u670d\u52a1\u5668ip1,ip2,ip3\u7ecf\u8fc7hash\u540e\u843d\u5230\u4e86\u4e00\u81f4\u6027hash\u73af\u4e0a\uff0c\u4ece\u56fe\u4e2dhash\u503c\u5206\u5e03\u53ef\u77e5ip1\u4f1a\u8d1f\u8d23\u5904\u7406\u5927\u698280%\u7684\u8bf7\u6c42\uff0c\u800cip2\u548cip3\u5219\u53ea\u4f1a\u8d1f\u8d23\u5904\u7406\u5927\u698220%\u7684\u8bf7\u6c42\uff0c\u867d\u7136\u4e09\u4e2a\u673a\u5668\u90fd\u5728\u5904\u7406\u8bf7\u6c42\uff0c\u4f46\u662f\u660e\u663e\u6bcf\u4e2a\u673a\u5668\u7684\u8d1f\u8f7d\u4e0d\u5747\u8861\uff0c\u8fd9\u6837\u79f0\u4e3a\u4e00\u81f4\u6027hash\u7684\u503e\u659c\uff0c\u865a\u62df\u8282\u70b9\u7684\u51fa\u73b0\u5c31\u662f\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n

      \u4e94\u3001\u865a\u62df\u8282\u70b9<\/h1>\n

      \u5f53\u670d\u52a1\u5668\u8282\u70b9\u6bd4\u8f83\u5c11\u7684\u65f6\u5019\u4f1a\u51fa\u73b0\u4e0a\u8282\u6240\u8bf4\u7684\u4e00\u81f4\u6027hash\u503e\u659c\u7684\u95ee\u9898\uff0c\u4e00\u4e2a\u89e3\u51b3\u65b9\u6cd5\u662f\u591a\u52a0\u673a\u5668\uff0c\u4f46\u662f\u52a0\u673a\u5668\u662f\u6709\u6210\u672c\u7684\uff0c\u90a3\u4e48\u5c31\u52a0\u865a\u62df\u8282\u70b9\uff0c\u6bd4\u5982\u4e0a\u9762\u4e09\u4e2a\u673a\u5668\uff0c\u6bcf\u4e2a\u673a\u5668\u5f15\u51651\u4e2a\u865a\u62df\u8282\u70b9\u540e\u7684\u4e00\u81f4\u6027hash\u73af\u7684\u56fe\u5982\u4e0b\uff1a<\/p>\n

      \n
      \n
      <\/div>\n
      <\/div>\n<\/div>\n
      image.png<\/div>\n<\/div>\n

      \u5176\u4e2dip1-1\u662fip1\u7684\u865a\u62df\u8282\u70b9\uff0cip2-1\u662fip2\u7684\u865a\u62df\u8282\u70b9\uff0cip3-1\u662fip3\u7684\u865a\u62df\u8282\u70b9\u3002
      \n\u53ef\u77e5\u5f53\u7269\u7406\u673a\u5668\u6570\u76ee\u4e3aM\uff0c\u865a\u62df\u8282\u70b9\u4e3aN\u7684\u65f6\u5019\uff0c\u5b9e\u9645hash\u73af\u4e0a\u8282\u70b9\u4e2a\u6570\u4e3aM*N\u3002\u6bd4\u5982\u5f53\u5ba2\u6237\u7aef\u8ba1\u7b97\u7684hash\u503c\u5904\u4e8eip2\u548cip3\u6216\u8005\u5904\u4e8eip2-1\u548cip3-1\u4e4b\u95f4\u65f6\u5019\u4f7f\u7528ip3\u670d\u52a1\u5668\u8fdb\u884c\u5904\u7406\u3002<\/p>\n

      \u516d\u3001\u5747\u5300\u4e00\u81f4\u6027hash<\/h1>\n

      \u4e0a\u8282\u6211\u4eec\u4f7f\u7528\u865a\u62df\u8282\u70b9\u540e\u7684\u56fe\u770b\u8d77\u6765\u6bd4\u8f83\u5747\u8861\uff0c\u4f46\u662f\u5982\u679c\u751f\u6210\u865a\u62df\u8282\u70b9\u7684\u7b97\u6cd5\u4e0d\u591f\u597d\u5f88\u53ef\u80fd\u4f1a\u5f97\u5230\u4e0b\u9762\u7684\u73af\uff1a<\/p>\n

      \n
      \n
      <\/div>\n
      <\/div>\n<\/div>\n
      image.png<\/div>\n<\/div>\n

      \u53ef\u77e5\u6bcf\u4e2a\u670d\u52a1\u8282\u70b9\u5f15\u51651\u4e2a\u865a\u62df\u8282\u70b9\u540e\uff0c\u60c5\u51b5\u76f8\u6bd4\u6ca1\u6709\u5f15\u5165\u524d\u5747\u8861\u6027\u6709\u6240\u6539\u5584\uff0c\u4f46\u662f\u5e76\u4e0d\u5747\u8861\u3002<\/p>\n

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