{"id":1199,"date":"2020-05-06T01:35:48","date_gmt":"2020-05-05T17:35:48","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1199"},"modified":"2020-05-06T01:35:48","modified_gmt":"2020-05-05T17:35:48","slug":"lvs%e9%9b%86%e7%be%a4%e7%9a%84%e8%b4%9f%e8%bd%bd%e8%b0%83%e5%ba%a6-%e8%bd%ae%e8%af%a2-%e6%9d%83%e9%87%8d-%e6%9c%80%e5%b0%91%e8%bf%9e%e6%8e%a5-%e6%bd%8d%e9%b2%b8-%e6%bd%8d%e9%b2%b8%e7%a7%91%e6%8a%80","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1199","title":{"rendered":"LVS\u96c6\u7fa4\u7684\u8d1f\u8f7d\u8c03\u5ea6"},"content":{"rendered":"<p><strong><span class=\\\"atitle2\\\">1. \u524d\u8a00<\/span><\/strong><br \/>\nLVS\u96c6\u7fa4\u4e2d\u5b9e\u73b0\u7684\u4e09\u79cdIP\u8d1f\u8f7d\u5747\u8861\u6280\u672f\uff0c\u5b83\u4eec\u4e3b\u8981\u89e3\u51b3\u7cfb\u7edf\u7684\u53ef\u4f38\u7f29\u6027\u548c\u900f\u660e\u6027\u95ee\u9898\uff0c\u5982\u4f55\u901a\u8fc7\u8d1f\u8f7d\u8c03\u5ea6\u5668\u5c06\u8bf7\u6c42\u9ad8 \u6548\u5730\u5206\u53d1\u5230\u4e0d\u540c\u7684\u670d\u52a1\u5668\u6267\u884c\uff0c\u4f7f\u5f97\u7531\u591a\u53f0\u72ec\u7acb\u8ba1\u7b97\u673a\u7ec4\u6210\u7684\u96c6\u7fa4\u7cfb\u7edf\u6210\u4e3a\u4e00\u53f0\u865a\u62df\u670d\u52a1\u5668\uff1b\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e0e\u96c6\u7fa4\u7cfb\u7edf\u4ea4\u4e92\u65f6\uff0c\u5c31\u50cf\u4e0e\u4e00\u53f0\u9ad8\u6027\u80fd\u7684\u670d\u52a1\u5668\u4ea4\u4e92\u4e00 \u6837\u3002<br \/>\n\u672c\u6587\u5c06\u4e3b\u8981\u8bb2\u8ff0\u5728\u8d1f\u8f7d\u8c03\u5ea6\u5668\u4e0a\u7684\u8d1f\u8f7d\u8c03\u5ea6\u7b56\u7565\u548c\u7b97\u6cd5\uff0c\u5982\u4f55\u5c06\u8bf7\u6c42\u6d41\u8c03\u5ea6\u5230\u5404\u53f0\u670d\u52a1\u5668\uff0c\u4f7f\u5f97\u5404\u53f0\u670d\u52a1\u5668\u5c3d\u53ef\u80fd\u5730\u4fdd\u6301\u8d1f\u8f7d\u5747\u8861\u3002\u6587\u7ae0\u4e3b\u8981\u7531\u4e24\u4e2a\u90e8\u5206\u7ec4 \u6210\u3002\u7b2c\u4e00\u90e8\u5206\u63cf\u8ff0IP\u8d1f\u8f7d\u5747\u8861\u8f6f\u4ef6IPVS\u5728\u5185\u6838\u4e2d\u6240\u5b9e\u73b0\u7684\u5404\u79cd\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\uff1b\u7b2c\u4e8c\u90e8\u5206\u7ed9\u51fa\u4e00\u4e2a\u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\uff08Dynamic-feedback load balancing\uff09\uff0c\u5b83\u7ed3\u5408\u5185\u6838\u4e2d\u7684\u52a0\u6743\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\uff0c\u6839\u636e\u52a8\u6001\u53cd\u9988\u56de\u6765\u7684\u8d1f\u8f7d\u4fe1\u606f\u6765\u8c03\u6574\u670d\u52a1\u5668\u7684\u6743\u503c\uff0c\u6765\u8fdb\u4e00\u6b65\u907f\u514d\u670d\u52a1\u5668\u95f4\u7684\u8d1f\u8f7d\u4e0d\u5e73\u8861\u3002<br \/>\n\u5728\u4e0b\u9762\u63cf\u8ff0\u4e2d\uff0c\u6211\u4eec\u79f0\u5ba2\u6237\u7684socket\u548c\u670d\u52a1\u5668\u7684socket\u4e4b\u95f4\u7684\u6570\u636e\u901a\u8baf\u4e3a\u8fde\u63a5\uff0c\u65e0\u8bba\u5b83\u4eec\u662f\u4f7f\u7528TCP\u8fd8\u662fUDP\u534f\u8bae\u3002\u5bf9\u4e8eUDP\u6570\u636e\u62a5\u6587\u7684 \u8c03\u5ea6\uff0cIPVS\u8c03\u5ea6\u5668\u4e5f\u4f1a\u4e3a\u4e4b\u5efa\u7acb\u8c03\u5ea6\u8bb0\u5f55\u5e76\u8bbe\u7f6e\u8d85\u65f6\u503c\uff08\u59825\u5206\u949f\uff09\uff1b\u5728\u8bbe\u5b9a\u7684\u65f6\u95f4\u5185\uff0c\u6765\u81ea\u540c\u4e00\u5730\u5740\uff08IP\u5730\u5740\u548c\u7aef\u53e3\uff09\u7684UDP\u6570\u636e\u5305\u4f1a\u88ab\u8c03\u5ea6\u5230\u540c\u4e00\u53f0\u670d \u52a1\u5668\u3002<br \/>\n<strong><span class=\\\"atitle2\\\">2. \u5185\u6838\u4e2d\u7684\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5<\/span><\/strong><br \/>\nIPVS\u5728\u5185\u6838\u4e2d\u7684\u8d1f\u8f7d\u5747\u8861\u8c03\u5ea6\u662f\u4ee5\u8fde\u63a5\u4e3a\u7c92\u5ea6\u7684\u3002\u5728HTTP\u534f\u8bae\uff08\u975e\u6301\u4e45\uff09\u4e2d\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u4eceWEB\u670d\u52a1\u5668\u4e0a\u83b7\u53d6\u90fd\u9700\u8981\u5efa\u7acb\u4e00\u4e2aTCP\u8fde\u63a5\uff0c\u540c\u4e00\u7528\u6237 \u7684\u4e0d\u540c\u8bf7\u6c42\u4f1a\u88ab\u8c03\u5ea6\u5230\u4e0d\u540c\u7684\u670d\u52a1\u5668\u4e0a\uff0c\u6240\u4ee5\u8fd9\u79cd\u7ec6\u7c92\u5ea6\u7684\u8c03\u5ea6\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u53ef\u4ee5\u907f\u514d\u5355\u4e2a\u7528\u6237\u8bbf\u95ee\u7684\u7a81\u53d1\u6027\u5f15\u8d77\u670d\u52a1\u5668\u95f4\u7684\u8d1f\u8f7d\u4e0d\u5e73\u8861\u3002<br \/>\n\u5728\u5185\u6838\u4e2d\u7684\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\u4e0a\uff0cIPVS\u5df2\u5b9e\u73b0\u4e86\u4ee5\u4e0b\u516b\u79cd\u8c03\u5ea6\u7b97\u6cd5\uff1a<\/p>\n<ul>\n<li>\u8f6e\u53eb\u8c03\u5ea6\uff08Round-Robin Scheduling\uff09<\/li>\n<li>\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\uff08Weighted Round-Robin Scheduling\uff09<\/li>\n<li>\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\uff08Least-Connection Scheduling\uff09<\/li>\n<li>\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\uff08Weighted Least-Connection Scheduling\uff09<\/li>\n<li>\u57fa\u4e8e\u5c40\u90e8\u6027\u7684\u6700\u5c11\u94fe\u63a5\uff08Locality-Based Least Connections Scheduling\uff09<\/li>\n<li>\u5e26\u590d\u5236\u7684\u57fa\u4e8e\u5c40\u90e8\u6027\u6700\u5c11\u94fe\u63a5\uff08Locality-Based Least Connections with Replication Scheduling\uff09<\/li>\n<li>\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\uff08Destination Hashing Scheduling\uff09<\/li>\n<li>\u6e90\u5730\u5740\u6563\u5217\u8c03\u5ea6\uff08Source Hashing Scheduling\uff09<\/li>\n<\/ul>\n<p>\u4e0b\u9762\uff0c\u6211\u4eec\u5148\u4ecb\u7ecd\u8fd9\u516b\u79cd\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\u7684\u5de5\u4f5c\u539f\u7406\u548c\u7b97\u6cd5\u6d41\u7a0b\uff0c\u4f1a\u5728\u4ee5\u540e\u7684\u6587\u7ae0\u4e2d\u63cf\u8ff0\u600e\u4e48\u7528\u5b83\u4eec\u3002<br \/>\n<span class=\\\"atitle3\\\">2.1. \u8f6e\u53eb\u8c03\u5ea6<\/span><br \/>\n\u8f6e\u53eb\u8c03\u5ea6\uff08Round Robin Scheduling\uff09\u7b97\u6cd5\u5c31\u662f\u4ee5\u8f6e\u53eb\u7684\u65b9\u5f0f\u4f9d\u6b21\u5c06\u8bf7\u6c42\u8c03\u5ea6\u4e0d\u540c\u7684\u670d\u52a1\u5668\uff0c\u5373\u6bcf\u6b21\u8c03\u5ea6\u6267\u884ci = (i + 1) mod n\uff0c\u5e76\u9009\u51fa\u7b2ci\u53f0\u670d\u52a1\u5668\u3002\u7b97\u6cd5\u7684\u4f18\u70b9\u662f\u5176\u7b80\u6d01\u6027\uff0c\u5b83\u65e0\u9700\u8bb0\u5f55\u5f53\u524d\u6240\u6709\u8fde\u63a5\u7684\u72b6\u6001\uff0c\u6240\u4ee5\u5b83\u662f\u4e00\u79cd\u65e0\u72b6\u6001\u8c03\u5ea6\u3002<br \/>\n\u5728\u7cfb\u7edf\u5b9e\u73b0\u65f6\uff0c\u6211\u4eec\u5f15\u5165\u4e86\u4e00\u4e2a\u989d\u5916\u6761\u4ef6\uff0c\u5f53\u670d\u52a1\u5668\u7684\u6743\u503c\u4e3a\u96f6\u65f6\uff0c\u8868\u793a\u8be5\u670d\u52a1\u5668\u4e0d\u53ef\u7528\u800c\u4e0d\u88ab\u8c03\u5ea6\u3002\u8fd9\u6837\u505a\u7684\u76ee\u7684\u662f\u5c06\u670d\u52a1\u5668\u5207\u51fa\u670d\u52a1\uff08\u5982\u5c4f\u853d\u670d\u52a1\u5668\u6545\u969c\u548c\u7cfb\u7edf\u7ef4\u62a4\uff09\uff0c\u540c\u65f6\u4e0e\u5176\u4ed6\u52a0\u6743\u7b97\u6cd5\u4fdd\u6301\u4e00\u81f4\u3002\u6240\u4ee5\uff0c\u7b97\u6cd5\u8981\u4f5c\u76f8\u5e94\u7684\u6539\u52a8\uff0c\u5b83\u7684\u7b97\u6cd5\u6d41\u7a0b\u5982\u4e0b\uff1a<br \/>\n<b>\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u6d41\u7a0b<\/b><\/p>\n<table border=\\\"1\\\" width=\\\"100%\\\" cellspacing=\\\"0\\\" cellpadding=\\\"5\\\" bgcolor=\\\"#cccccc\\\">\n<tbody>\n<tr>\n<td>\n<pre><code>\n\u5047\u8bbe\u6709\u4e00\u7ec4\u670d\u52a1\u5668S = {S0, S1, \u2026, Sn-1}\uff0c\u4e00\u4e2a\u6307\u793a\u53d8\u91cfi\u8868\u793a\u4e0a\u4e00\u6b21\u9009\u62e9\u7684\n\u670d\u52a1\u5668\uff0cW(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u6743\u503c\u3002\u53d8\u91cfi\u88ab\u521d\u59cb\u5316\u4e3an-1\uff0c\u5176\u4e2dn &gt; 0\u3002\nj = i;\ndo {\n\tj = (j + 1) mod n;\n\tif (W(Sj) &gt; 0) {\n\t\ti = j;\n\t\treturn Si;\n\t}\n} while (j != i);\nreturn NULL;\n<\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u5047\u8bbe\u6240\u6709\u670d\u52a1\u5668\u5904\u7406\u6027\u80fd\u5747\u76f8\u540c\uff0c\u4e0d\u7ba1\u670d\u52a1\u5668\u7684\u5f53\u524d\u8fde\u63a5\u6570\u548c\u54cd\u5e94\u901f\u5ea6\u3002\u8be5\u7b97\u6cd5\u76f8\u5bf9\u7b80\u5355\uff0c\u4e0d\u9002\u7528\u4e8e\u670d\u52a1\u5668\u7ec4\u4e2d\u5904\u7406\u6027\u80fd\u4e0d\u4e00\u7684\u60c5\u51b5\uff0c\u800c\u4e14\u5f53\u8bf7\u6c42\u670d\u52a1\u65f6\u95f4\u53d8\u5316\u6bd4\u8f83\u5927\u65f6\uff0c\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u5bb9\u6613\u5bfc\u81f4\u670d\u52a1\u5668\u95f4\u7684\u8d1f\u8f7d\u4e0d\u5e73\u8861\u3002<br \/>\n\u867d\u7136Round-Robin DNS\u65b9\u6cd5\u4e5f\u662f\u4ee5\u8f6e\u53eb\u8c03\u5ea6\u7684\u65b9\u5f0f\u5c06\u4e00\u4e2a\u57df\u540d\u89e3\u6790\u5230\u591a\u4e2aIP\u5730\u5740\uff0c\u4f46\u8f6e\u53ebDNS\u65b9\u6cd5\u7684\u8c03\u5ea6\u7c92\u5ea6\u662f\u57fa\u4e8e\u6bcf\u4e2a\u57df\u540d\u670d\u52a1\u5668\u7684\uff0c\u57df\u540d\u670d\u52a1\u5668\u5bf9\u57df\u540d\u89e3\u6790\u7684\u7f13\u5b58\u4f1a\u59a8\u788d\u8f6e \u53eb\u89e3\u6790\u57df\u540d\u751f\u6548\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u670d\u52a1\u5668\u95f4\u8d1f\u8f7d\u7684\u4e25\u91cd\u4e0d\u5e73\u8861\u3002\u8fd9\u91cc\uff0cIPVS\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u7684\u7c92\u5ea6\u662f\u57fa\u4e8e\u6bcf\u4e2a\u8fde\u63a5\u7684\uff0c\u540c\u4e00\u7528\u6237\u7684\u4e0d\u540c\u8fde\u63a5\u90fd\u4f1a\u88ab\u8c03\u5ea6\u5230\u4e0d\u540c\u7684\u670d\u52a1\u5668 \u4e0a\uff0c\u6240\u4ee5\u8fd9\u79cd\u7ec6\u7c92\u5ea6\u7684\u8f6e\u53eb\u8c03\u5ea6\u8981\u6bd4DNS\u7684\u8f6e\u53eb\u8c03\u5ea6\u4f18\u8d8a\u5f88\u591a\u3002<br \/>\n<span class=\\\"atitle3\\\">2.2. \u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6<\/span><br \/>\n\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\uff08Weighted Round-Robin Scheduling\uff09\u7b97\u6cd5\u53ef\u4ee5\u89e3\u51b3\u670d\u52a1\u5668\u95f4\u6027\u80fd\u4e0d\u4e00\u7684\u60c5\u51b5\uff0c\u5b83\u7528\u76f8\u5e94\u7684\u6743\u503c\u8868\u793a\u670d\u52a1\u5668\u7684\u5904\u7406\u6027\u80fd\uff0c\u670d\u52a1\u5668\u7684\u7f3a\u7701\u6743\u503c\u4e3a1\u3002\u5047\u8bbe\u670d\u52a1\u5668A\u7684\u6743\u503c\u4e3a1\uff0cB\u7684 \u6743\u503c\u4e3a2\uff0c\u5219\u8868\u793a\u670d\u52a1\u5668B\u7684\u5904\u7406\u6027\u80fd\u662fA\u7684\u4e24\u500d\u3002\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u662f\u6309\u6743\u503c\u7684\u9ad8\u4f4e\u548c\u8f6e\u53eb\u65b9\u5f0f\u5206\u914d\u8bf7\u6c42\u5230\u5404\u670d\u52a1\u5668\u3002\u6743\u503c\u9ad8\u7684\u670d\u52a1\u5668\u5148\u6536\u5230\u7684\u8fde\u63a5\uff0c\u6743\u503c\u9ad8\u7684\u670d \u52a1\u5668\u6bd4\u6743\u503c\u4f4e\u7684\u670d\u52a1\u5668\u5904\u7406\u66f4\u591a\u7684\u8fde\u63a5\uff0c\u76f8\u540c\u6743\u503c\u7684\u670d\u52a1\u5668\u5904\u7406\u76f8\u540c\u6570\u76ee\u7684\u8fde\u63a5\u6570\u3002\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u6d41\u7a0b\u5982\u4e0b\uff1a<br \/>\n<b>\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u6d41\u7a0b<\/b><\/p>\n<table border=\\\"1\\\" width=\\\"100%\\\" cellspacing=\\\"0\\\" cellpadding=\\\"5\\\" bgcolor=\\\"#cccccc\\\">\n<tbody>\n<tr>\n<td>\n<pre><code>\n\u5047\u8bbe\u6709\u4e00\u7ec4\u670d\u52a1\u5668S = {S0, S1, \u2026, Sn-1}\uff0cW(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u6743\u503c\uff0c\u4e00\u4e2a\n\u6307\u793a\u53d8\u91cfi\u8868\u793a\u4e0a\u4e00\u6b21\u9009\u62e9\u7684\u670d\u52a1\u5668\uff0c\u6307\u793a\u53d8\u91cfcw\u8868\u793a\u5f53\u524d\u8c03\u5ea6\u7684\u6743\u503c\uff0cmax(S)\n\u8868\u793a\u96c6\u5408S\u4e2d\u6240\u6709\u670d\u52a1\u5668\u7684\u6700\u5927\u6743\u503c\uff0cgcd(S)\u8868\u793a\u96c6\u5408S\u4e2d\u6240\u6709\u670d\u52a1\u5668\u6743\u503c\u7684\u6700\u5927\n\u516c\u7ea6\u6570\u3002\u53d8\u91cfi\u521d\u59cb\u5316\u4e3a-1\uff0ccw\u521d\u59cb\u5316\u4e3a\u96f6\u3002\nwhile (true) {\n  i = (i + 1) mod n;\nif (i == 0) {\n     cw = cw - gcd(S);\n     if (cw &lt;= 0) {\n       cw = max(S);\n       if (cw == 0)\n         return NULL;\n     }\n  }\n  if (W(Si) &gt;= cw)\n    return Si;\n}\n<\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4f8b\u5982\uff0c\u6709\u4e09\u4e2a\u670d\u52a1\u5668A\u3001B\u548cC\u5206\u522b\u6709\u6743\u503c4\u30013\u548c2\uff0c\u5219\u5728\u4e00\u4e2a\u8c03\u5ea6\u5468\u671f\u5185(mod sum(W(Si)))\u8c03\u5ea6\u5e8f\u5217\u4e3aAABABCABC\u3002\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u8fd8\u662f\u6bd4\u8f83\u7b80\u5355\u548c\u9ad8\u6548\u3002\u5f53\u8bf7\u6c42\u7684\u670d\u52a1\u65f6\u95f4\u53d8\u5316\u5f88\u5927\uff0c\u5355\u72ec\u7684\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u4f9d\u7136\u4f1a\u5bfc\u81f4\u670d\u52a1\u5668\u95f4\u7684\u8d1f\u8f7d\u4e0d\u5e73\u8861\u3002<br \/>\n\u4ece\u4e0a\u9762\u7684\u7b97\u6cd5\u6d41\u7a0b\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\u5f53\u670d\u52a1\u5668\u7684\u6743\u503c\u4e3a\u96f6\u65f6\uff0c\u8be5\u670d\u52a1\u5668\u4e0d\u88ab\u88ab\u8c03\u5ea6\uff1b\u5f53\u6240\u6709\u670d\u52a1\u5668\u7684\u6743\u503c\u4e3a\u96f6\uff0c\u5373\u5bf9\u4e8e\u4efb\u610fi\u6709W(Si)=0\uff0c\u5219\u6ca1\u6709\u4efb\u4f55 \u670d\u52a1\u5668\u53ef\u7528\uff0c\u7b97\u6cd5\u8fd4\u56deNULL\uff0c\u6240\u6709\u7684\u65b0\u8fde\u63a5\u90fd\u4f1a\u88ab\u4e22\u6389\u3002\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\u4e5f\u65e0\u9700\u8bb0\u5f55\u5f53\u524d\u6240\u6709\u8fde\u63a5\u7684\u72b6\u6001\uff0c\u6240\u4ee5\u5b83\u4e5f\u662f\u4e00\u79cd\u65e0\u72b6\u6001\u8c03\u5ea6\u3002<br \/>\n<span class=\\\"atitle3\\\">2.3. \u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6<\/span><br \/>\n\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\uff08Least-Connection Scheduling\uff09\u7b97\u6cd5\u662f\u628a\u65b0\u7684\u8fde\u63a5\u8bf7\u6c42\u5206\u914d\u5230\u5f53\u524d\u8fde\u63a5\u6570\u6700\u5c0f\u7684\u670d\u52a1\u5668\u3002\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u662f\u4e00\u79cd\u52a8\u6001\u8c03\u5ea6\u7b97\u6cd5\uff0c\u5b83\u901a\u8fc7\u670d\u52a1\u5668\u5f53\u524d\u6240\u6d3b\u8dc3\u7684\u8fde\u63a5\u6570\u6765\u4f30\u8ba1\u670d\u52a1 \u5668\u7684\u8d1f\u8f7d\u60c5\u51b5\u3002\u8c03\u5ea6\u5668\u9700\u8981\u8bb0\u5f55\u5404\u4e2a\u670d\u52a1\u5668\u5df2\u5efa\u7acb\u8fde\u63a5\u7684\u6570\u76ee\uff0c\u5f53\u4e00\u4e2a\u8bf7\u6c42\u88ab\u8c03\u5ea6\u5230\u67d0\u53f0\u670d\u52a1\u5668\uff0c\u5176\u8fde\u63a5\u6570\u52a01\uff1b\u5f53\u8fde\u63a5\u4e2d\u6b62\u6216\u8d85\u65f6\uff0c\u5176\u8fde\u63a5\u6570\u51cf\u4e00\u3002<br \/>\n\u5728\u7cfb\u7edf\u5b9e\u73b0\u65f6\uff0c\u6211\u4eec\u4e5f\u5f15\u5165\u5f53\u670d\u52a1\u5668\u7684\u6743\u503c\u4e3a\u96f6\u65f6\uff0c\u8868\u793a\u8be5\u670d\u52a1\u5668\u4e0d\u53ef\u7528\u800c\u4e0d\u88ab\u8c03\u5ea6\uff0c\u5b83\u7684\u7b97\u6cd5\u6d41\u7a0b\u5982\u4e0b\uff1a<br \/>\n<b>\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\u6d41\u7a0b<\/b><\/p>\n<table border=\\\"1\\\" width=\\\"100%\\\" cellspacing=\\\"0\\\" cellpadding=\\\"5\\\" bgcolor=\\\"#cccccc\\\">\n<tbody>\n<tr>\n<td>\n<pre><code>\n\u5047\u8bbe\u6709\u4e00\u7ec4\u670d\u52a1\u5668S = {S0, S1, ..., Sn-1}\uff0cW(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u6743\u503c\uff0c\nC(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u5f53\u524d\u8fde\u63a5\u6570\u3002\nfor (m = 0; m &lt; n; m++) {\n\tif (W(Sm) &gt; 0) {\n\t\tfor (i = m+1; i &lt; n; i++) {\n\t\t\tif (W(Si) &lt;= 0)\n\t\t\t\tcontinue;\n\t\t\tif (C(Si) &lt; C(Sm))\n\t\t\t\tm = i;\n\t\t}\n\t\treturn Sm;\n\t}\n}\nreturn NULL;\n<\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5f53\u5404\u4e2a\u670d\u52a1\u5668\u6709\u76f8\u540c\u7684\u5904\u7406\u6027\u80fd\u65f6\uff0c\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\u80fd\u628a\u8d1f\u8f7d\u53d8\u5316\u5927\u7684\u8bf7\u6c42\u5206\u5e03\u5e73\u6ed1\u5230\u5404\u4e2a\u670d\u52a1\u5668\u4e0a\uff0c\u6240\u6709\u5904\u7406\u65f6\u95f4\u6bd4\u8f83\u957f\u7684\u8bf7\u6c42\u4e0d\u53ef\u80fd\u88ab\u53d1\u9001\u5230\u540c\u4e00\u53f0\u670d \u52a1\u5668\u4e0a\u3002\u4f46\u662f\uff0c\u5f53\u5404\u4e2a\u670d\u52a1\u5668\u7684\u5904\u7406\u80fd\u529b\u4e0d\u540c\u65f6\uff0c\u8be5\u7b97\u6cd5\u5e76\u4e0d\u7406\u60f3\uff0c\u56e0\u4e3aTCP\u8fde\u63a5\u5904\u7406\u8bf7\u6c42\u540e\u4f1a\u8fdb\u5165TIME_WAIT\u72b6\u6001\uff0cTCP\u7684TIME_WAIT\u4e00\u822c \u4e3a2\u5206\u949f\uff0c\u6b64\u65f6\u8fde\u63a5\u8fd8\u5360\u7528\u670d\u52a1\u5668\u7684\u8d44\u6e90\uff0c\u6240\u4ee5\u4f1a\u51fa\u73b0\u8fd9\u6837\u60c5\u5f62\uff0c\u6027\u80fd\u9ad8\u7684\u670d\u52a1\u5668\u5df2\u5904\u7406\u6240\u6536\u5230\u7684\u8fde\u63a5\uff0c\u8fde\u63a5\u5904\u4e8eTIME_WAIT\u72b6\u6001\uff0c\u800c\u6027\u80fd\u4f4e\u7684\u670d\u52a1\u5668\u5df2\u7ecf \u5fd9\u4e8e\u5904\u7406\u6240\u6536\u5230\u7684\u8fde\u63a5\uff0c\u8fd8\u4e0d\u65ad\u5730\u6536\u5230\u65b0\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<br \/>\n<span class=\\\"atitle3\\\">2.4. \u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6<\/span><br \/>\n\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\uff08Weighted Least-Connection Scheduling\uff09\u7b97\u6cd5\u662f\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u7684\u8d85\u96c6\uff0c\u5404\u4e2a\u670d\u52a1\u5668\u7528\u76f8\u5e94\u7684\u6743\u503c\u8868\u793a\u5176\u5904\u7406\u6027\u80fd\u3002\u670d\u52a1\u5668\u7684\u7f3a\u7701\u6743\u503c\u4e3a1\uff0c\u7cfb\u7edf\u7ba1\u7406\u5458\u53ef\u4ee5\u52a8\u6001\u5730\u8bbe\u7f6e\u670d\u52a1\u5668\u7684\u6743 \u503c\u3002\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u5728\u8c03\u5ea6\u65b0\u8fde\u63a5\u65f6\u5c3d\u53ef\u80fd\u4f7f\u670d\u52a1\u5668\u7684\u5df2\u5efa\u7acb\u8fde\u63a5\u6570\u548c\u5176\u6743\u503c\u6210\u6bd4\u4f8b\u3002\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u7684\u7b97\u6cd5\u6d41\u7a0b\u5982\u4e0b\uff1a<br \/>\n<b>\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u7684\u7b97\u6cd5\u6d41\u7a0b<\/b><\/p>\n<table border=\\\"1\\\" width=\\\"100%\\\" cellspacing=\\\"0\\\" cellpadding=\\\"5\\\" bgcolor=\\\"#cccccc\\\">\n<tbody>\n<tr>\n<td>\n<pre><code>\n\u5047\u8bbe\u6709\u4e00\u7ec4\u670d\u52a1\u5668S = {S0, S1, ..., Sn-1}\uff0cW(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u6743\u503c\uff0c\nC(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u5f53\u524d\u8fde\u63a5\u6570\u3002\u6240\u6709\u670d\u52a1\u5668\u5f53\u524d\u8fde\u63a5\u6570\u7684\u603b\u548c\u4e3a\nCSUM = \u03a3C(Si)  (i=0, 1, .. , n-1)\u3002\u5f53\u524d\u7684\u65b0\u8fde\u63a5\u8bf7\u6c42\u4f1a\u88ab\u53d1\u9001\u670d\u52a1\u5668Sm\uff0c\n\u5f53\u4e14\u4ec5\u5f53\u670d\u52a1\u5668Sm\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\n  (C(Sm) \/ CSUM)\/ W(Sm) = min { (C(Si) \/ CSUM) \/ W(Si)}  (i=0, 1, . , n-1)\n  \u5176\u4e2dW(Si)\u4e0d\u4e3a\u96f6\n\u56e0\u4e3aCSUM\u5728\u8fd9\u4e00\u8f6e\u67e5\u627e\u4e2d\u662f\u4e2a\u5e38\u6570\uff0c\u6240\u4ee5\u5224\u65ad\u6761\u4ef6\u53ef\u4ee5\u7b80\u5316\u4e3a\n  C(Sm) \/ W(Sm) = min { C(Si) \/ W(Si)}  (i=0, 1, . , n-1)\n  \u5176\u4e2dW(Si)\u4e0d\u4e3a\u96f6\n\u56e0\u4e3a\u9664\u6cd5\u6240\u9700\u7684CPU\u5468\u671f\u6bd4\u4e58\u6cd5\u591a\uff0c\u4e14\u5728Linux\u5185\u6838\u4e2d\u4e0d\u5141\u8bb8\u6d6e\u70b9\u9664\u6cd5\uff0c\u670d\u52a1\u5668\u7684\n\u6743\u503c\u90fd\u5927\u4e8e\u96f6\uff0c\u6240\u4ee5\u5224\u65ad\u6761\u4ef6C(Sm) \/ W(Sm) &gt; C(Si) \/ W(Si) \u53ef\u4ee5\u8fdb\u4e00\u6b65\u4f18\u5316\n\u4e3aC(Sm)*W(Si) &gt; C(Si)* W(Sm)\u3002\u540c\u65f6\u4fdd\u8bc1\u670d\u52a1\u5668\u7684\u6743\u503c\u4e3a\u96f6\u65f6\uff0c\u670d\u52a1\u5668\u4e0d\u88ab\u8c03\n\u5ea6\u3002\u6240\u4ee5\uff0c\u7b97\u6cd5\u53ea\u8981\u6267\u884c\u4ee5\u4e0b\u6d41\u7a0b\u3002\nfor (m = 0; m &lt; n; m++) {\n\tif (W(Sm) &gt; 0) {\n\t\tfor (i = m+1; i &lt; n; i++) {\n\t\t\tif (C(Sm)*W(Si) &gt; C(Si)*W(Sm))\n\t\t\t\tm = i;\n\t\t}\n\t\treturn Sm;\n\t}\n}\nreturn NULL;\n<\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span class=\\\"atitle3\\\">2.5. \u57fa\u4e8e\u5c40\u90e8\u6027\u7684\u6700\u5c11\u94fe\u63a5\u8c03\u5ea6<\/span><br \/>\n\u57fa\u4e8e\u5c40\u90e8\u6027\u7684\u6700\u5c11\u94fe\u63a5\u8c03\u5ea6\uff08Locality-Based Least Connections Scheduling\uff0c\u4ee5\u4e0b\u7b80\u79f0\u4e3aLBLC\uff09\u7b97\u6cd5\u662f\u9488\u5bf9\u8bf7\u6c42\u62a5\u6587\u7684\u76ee\u6807IP\u5730\u5740\u7684\u8d1f\u8f7d\u5747\u8861\u8c03\u5ea6\uff0c\u76ee\u524d\u4e3b\u8981\u7528\u4e8eCache\u96c6\u7fa4\u7cfb\u7edf\uff0c\u56e0\u4e3a\u5728Cache\u96c6\u7fa4\u4e2d \u5ba2\u6237\u8bf7\u6c42\u62a5\u6587\u7684\u76ee\u6807IP\u5730\u5740\u662f\u53d8\u5316\u7684\u3002\u8fd9\u91cc\u5047\u8bbe\u4efb\u4f55\u540e\u7aef\u670d\u52a1\u5668\u90fd\u53ef\u4ee5\u5904\u7406\u4efb\u4e00\u8bf7\u6c42\uff0c\u7b97\u6cd5\u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u5728\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\u57fa\u672c\u5e73\u8861\u60c5\u51b5\u4e0b\uff0c\u5c06\u76f8\u540c\u76ee\u6807IP\u5730\u5740\u7684 \u8bf7\u6c42\u8c03\u5ea6\u5230\u540c\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u6765\u63d0\u9ad8\u5404\u53f0\u670d\u52a1\u5668\u7684\u8bbf\u95ee\u5c40\u90e8\u6027\u548c\u4e3b\u5b58Cache\u547d\u4e2d\u7387\uff0c\u4ece\u800c\u6574\u4e2a\u96c6\u7fa4\u7cfb\u7edf\u7684\u5904\u7406\u80fd\u529b\u3002<br \/>\nLBLC\u8c03\u5ea6\u7b97\u6cd5\u5148\u6839\u636e\u8bf7\u6c42\u7684\u76ee\u6807IP\u5730\u5740\u627e\u51fa\u8be5\u76ee\u6807IP\u5730\u5740\u6700\u8fd1\u4f7f\u7528\u7684\u670d\u52a1\u5668\uff0c\u82e5\u8be5\u670d\u52a1\u5668\u662f\u53ef\u7528\u7684\u4e14\u6ca1\u6709\u8d85\u8f7d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\uff1b\u82e5\u670d\u52a1\u5668\u4e0d \u5b58\u5728\uff0c\u6216\u8005\u8be5\u670d\u52a1\u5668\u8d85\u8f7d\u4e14\u6709\u670d\u52a1\u5668\u5904\u4e8e\u5176\u4e00\u534a\u7684\u5de5\u4f5c\u8d1f\u8f7d\uff0c\u5219\u7528\u201c\u6700\u5c11\u94fe\u63a5\u201d\u7684\u539f\u5219\u9009\u51fa\u4e00\u4e2a\u53ef\u7528\u7684\u670d\u52a1\u5668\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\u3002\u8be5\u7b97\u6cd5\u7684\u8be6\u7ec6\u6d41\u7a0b\u5982\u4e0b\uff1a<br \/>\n<b>LBLC\u8c03\u5ea6\u7b97\u6cd5\u6d41\u7a0b<\/b><\/p>\n<table border=\\\"1\\\" width=\\\"100%\\\" cellspacing=\\\"0\\\" cellpadding=\\\"5\\\" bgcolor=\\\"#cccccc\\\">\n<tbody>\n<tr>\n<td>\n<pre><code>\n\u5047\u8bbe\u6709\u4e00\u7ec4\u670d\u52a1\u5668S = {S0, S1, ..., Sn-1}\uff0cW(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u6743\u503c\uff0c\nC(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u5f53\u524d\u8fde\u63a5\u6570\u3002ServerNode[dest_ip]\u662f\u4e00\u4e2a\u5173\u8054\u53d8\u91cf\uff0c\u8868\u793a\n\u76ee\u6807IP\u5730\u5740\u6240\u5bf9\u5e94\u7684\u670d\u52a1\u5668\u7ed3\u70b9\uff0c\u4e00\u822c\u6765\u8bf4\u5b83\u662f\u901a\u8fc7Hash\u8868\u5b9e\u73b0\u7684\u3002WLC(S)\u8868\u793a\n\u5728\u96c6\u5408S\u4e2d\u7684\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u670d\u52a1\u5668\uff0c\u5373\u524d\u9762\u7684\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u3002Now\u4e3a\u5f53\u524d\u7cfb\u7edf\n\u65f6\u95f4\u3002\nif (ServerNode[dest_ip] is NULL) then {\n\tn = WLC(S);\n\tif (n is NULL) then return NULL;\n\tServerNode[dest_ip].server = n;\n} else {\n\tn = ServerNode[dest_ip].server;\n\tif ((n is dead) OR\n\t    (C(n) &gt; W(n) AND\n\t     there is a node m with C(m) &lt; W(m)\/2))) then {\n\t\tn = WLC(S);\n\t\tif (n is NULL) then return NULL;\n\t\tServerNode[dest_ip].server = n;\n\t}\n}\nServerNode[dest_ip].lastuse = Now;\nreturn n;\n<\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6b64\u5916\uff0c\u5bf9\u5173\u8054\u53d8\u91cfServerNode[dest_ip]\u8981\u8fdb\u884c\u5468\u671f\u6027\u7684\u5783\u573e\u56de\u6536\uff08Garbage Collection\uff09\uff0c\u5c06\u8fc7\u671f\u7684\u76ee\u6807IP\u5730\u5740\u5230\u670d\u52a1\u5668\u5173\u8054\u9879\u8fdb\u884c\u56de\u6536\u3002\u8fc7\u671f\u7684\u5173\u8054\u9879\u662f\u6307\u54ea\u4e9b\u5f53\u524d\u65f6\u95f4\uff08\u5b9e\u73b0\u65f6\u91c7\u7528\u7cfb\u7edf\u65f6\u949f\u8282\u62cd\u6570jiffies\uff09\u51cf\u53bb\u6700 \u8fd1\u4f7f\u7528\u65f6\u95f4\u8d85\u8fc7\u8bbe\u5b9a\u8fc7\u671f\u65f6\u95f4\u7684\u5173\u8054\u9879\uff0c\u7cfb\u7edf\u7f3a\u7701\u7684\u8bbe\u5b9a\u8fc7\u671f\u65f6\u95f4\u4e3a24\u5c0f\u65f6\u3002<br \/>\n<span class=\\\"atitle3\\\">2.6. \u5e26\u590d\u5236\u7684\u57fa\u4e8e\u5c40\u90e8\u6027\u6700\u5c11\u94fe\u63a5\u8c03\u5ea6<\/span><br \/>\n\u5e26\u590d\u5236\u7684\u57fa\u4e8e\u5c40\u90e8\u6027\u6700\u5c11\u94fe\u63a5\u8c03\u5ea6\uff08Locality-Based Least Connections with Replication Scheduling\uff0c\u4ee5\u4e0b\u7b80\u79f0\u4e3aLBLCR\uff09\u7b97\u6cd5\u4e5f\u662f\u9488\u5bf9\u76ee\u6807IP\u5730\u5740\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u76ee\u524d\u4e3b\u8981\u7528\u4e8eCache\u96c6\u7fa4\u7cfb\u7edf\u3002\u5b83\u4e0eLBLC\u7b97\u6cd5\u7684\u4e0d\u540c\u4e4b\u5904\u662f\u5b83\u8981 \u7ef4\u62a4\u4ece\u4e00\u4e2a\u76ee\u6807IP\u5730\u5740\u5230\u4e00\u7ec4\u670d\u52a1\u5668\u7684\u6620\u5c04\uff0c\u800cLBLC\u7b97\u6cd5\u7ef4\u62a4\u4ece\u4e00\u4e2a\u76ee\u6807IP\u5730\u5740\u5230\u4e00\u53f0\u670d\u52a1\u5668\u7684\u6620\u5c04\u3002\u5bf9\u4e8e\u4e00\u4e2a\u201c\u70ed\u95e8\u201d\u7ad9\u70b9\u7684\u670d\u52a1\u8bf7\u6c42\uff0c\u4e00\u53f0Cache \u670d\u52a1\u5668\u53ef\u80fd\u4f1a\u5fd9\u4e0d\u8fc7\u6765\u5904\u7406\u8fd9\u4e9b\u8bf7\u6c42\u3002\u8fd9\u65f6\uff0cLBLC\u8c03\u5ea6\u7b97\u6cd5\u4f1a\u4ece\u6240\u6709\u7684Cache\u670d\u52a1\u5668\u4e2d\u6309\u201c\u6700\u5c0f\u8fde\u63a5\u201d\u539f\u5219\u9009\u51fa\u4e00\u53f0Cache\u670d\u52a1\u5668\uff0c\u6620\u5c04\u8be5\u201c\u70ed\u95e8\u201d\u7ad9 \u70b9\u5230\u8fd9\u53f0Cache\u670d\u52a1\u5668\uff0c\u5f88\u5feb\u8fd9\u53f0Cache\u670d\u52a1\u5668\u4e5f\u4f1a\u8d85\u8f7d\uff0c\u5c31\u4f1a\u91cd\u590d\u4e0a\u8ff0\u8fc7\u7a0b\u9009\u51fa\u65b0\u7684Cache\u670d\u52a1\u5668\u3002\u8fd9\u6837\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8be5\u201c\u70ed\u95e8\u201d\u7ad9\u70b9\u7684\u6620\u50cf\u4f1a\u51fa\u73b0 \u5728\u6240\u6709\u7684Cache\u670d\u52a1\u5668\u4e0a\uff0c\u964d\u4f4e\u4e86Cache\u670d\u52a1\u5668\u7684\u4f7f\u7528\u6548\u7387\u3002LBLCR\u8c03\u5ea6\u7b97\u6cd5\u5c06\u201c\u70ed\u95e8\u201d\u7ad9\u70b9\u6620\u5c04\u5230\u4e00\u7ec4Cache\u670d\u52a1\u5668\uff08\u670d\u52a1\u5668\u96c6\u5408\uff09\uff0c\u5f53\u8be5\u201c\u70ed \u95e8\u201d\u7ad9\u70b9\u7684\u8bf7\u6c42\u8d1f\u8f7d\u589e\u52a0\u65f6\uff0c\u4f1a\u589e\u52a0\u96c6\u5408\u91cc\u7684Cache\u670d\u52a1\u5668\uff0c\u6765\u5904\u7406\u4e0d\u65ad\u589e\u957f\u7684\u8d1f\u8f7d\uff1b\u5f53\u8be5\u201c\u70ed\u95e8\u201d\u7ad9\u70b9\u7684\u8bf7\u6c42\u8d1f\u8f7d\u964d\u4f4e\u65f6\uff0c\u4f1a\u51cf\u5c11\u96c6\u5408\u91cc\u7684Cache\u670d\u52a1\u5668 \u6570\u76ee\u3002\u8fd9\u6837\uff0c\u8be5\u201c\u70ed\u95e8\u201d\u7ad9\u70b9\u7684\u6620\u50cf\u4e0d\u592a\u53ef\u80fd\u51fa\u73b0\u5728\u6240\u6709\u7684Cache\u670d\u52a1\u5668\u4e0a\uff0c\u4ece\u800c\u63d0\u4f9bCache\u96c6\u7fa4\u7cfb\u7edf\u7684\u4f7f\u7528\u6548\u7387\u3002<br \/>\nLBLCR\u7b97\u6cd5\u5148\u6839\u636e\u8bf7\u6c42\u7684\u76ee\u6807IP\u5730\u5740\u627e\u51fa\u8be5\u76ee\u6807IP\u5730\u5740\u5bf9\u5e94\u7684\u670d\u52a1\u5668\u7ec4\uff1b\u6309\u201c\u6700\u5c0f\u8fde\u63a5\u201d\u539f\u5219\u4ece\u8be5\u670d\u52a1\u5668\u7ec4\u4e2d\u9009\u51fa\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u82e5\u670d\u52a1\u5668\u6ca1\u6709\u8d85\u8f7d\uff0c \u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\uff1b\u82e5\u670d\u52a1\u5668\u8d85\u8f7d\uff1b\u5219\u6309\u201c\u6700\u5c0f\u8fde\u63a5\u201d\u539f\u5219\u4ece\u6574\u4e2a\u96c6\u7fa4\u4e2d\u9009\u51fa\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u5c06\u8be5\u670d\u52a1\u5668\u52a0\u5165\u5230\u670d\u52a1\u5668\u7ec4\u4e2d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\u3002\u540c\u65f6\uff0c\u5f53\u8be5 \u670d\u52a1\u5668\u7ec4\u6709\u4e00\u6bb5\u65f6\u95f4\u6ca1\u6709\u88ab\u4fee\u6539\uff0c\u5c06\u6700\u5fd9\u7684\u670d\u52a1\u5668\u4ece\u670d\u52a1\u5668\u7ec4\u4e2d\u5220\u9664\uff0c\u4ee5\u964d\u4f4e\u590d\u5236\u7684\u7a0b\u5ea6\u3002LBLCR\u8c03\u5ea6\u7b97\u6cd5\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<br \/>\n<b>LBLCR\u8c03\u5ea6\u7b97\u6cd5\u6d41\u7a0b<\/b><\/p>\n<table border=\\\"1\\\" width=\\\"100%\\\" cellspacing=\\\"0\\\" cellpadding=\\\"5\\\" bgcolor=\\\"#cccccc\\\">\n<tbody>\n<tr>\n<td>\n<pre><code>\n\u5047\u8bbe\u6709\u4e00\u7ec4\u670d\u52a1\u5668S = {S0, S1, ..., Sn-1}\uff0cW(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u6743\u503c\uff0c\nC(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u5f53\u524d\u8fde\u63a5\u6570\u3002ServerSet[dest_ip]\u662f\u4e00\u4e2a\u5173\u8054\u53d8\u91cf\uff0c\u8868\u793a\n\u76ee\u6807IP\u5730\u5740\u6240\u5bf9\u5e94\u7684\u670d\u52a1\u5668\u96c6\u5408\uff0c\u4e00\u822c\u6765\u8bf4\u5b83\u662f\u901a\u8fc7Hash\u8868\u5b9e\u73b0\u7684\u3002WLC(S)\u8868\u793a\n\u5728\u96c6\u5408S\u4e2d\u7684\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u670d\u52a1\u5668\uff0c\u5373\u524d\u9762\u7684\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\uff1bWGC(S)\u8868\u793a\u5728\n\u96c6\u5408S\u4e2d\u7684\u52a0\u6743\u6700\u5927\u8fde\u63a5\u670d\u52a1\u5668\u3002Now\u4e3a\u5f53\u524d\u7cfb\u7edf\u65f6\u95f4\uff0clastmod\u8868\u793a\u96c6\u5408\u7684\u6700\u8fd1\n\u4fee\u6539\u65f6\u95f4\uff0cT\u4e3a\u5bf9\u96c6\u5408\u8fdb\u884c\u8c03\u6574\u7684\u8bbe\u5b9a\u65f6\u95f4\u3002\nif (ServerSet[dest_ip] is NULL) then {\n\tn = WLC(S);\n\tif (n is NULL) then return NULL;\n\tadd n into ServerSet[dest_ip];\n} else {\n\tn = WLC(ServerSet[dest_ip]);\n\tif ((n is NULL) OR\n\t    (n is dead) OR\n\t    (C(n) &gt; W(n) AND\n\t     there is a node m with C(m) &lt; W(m)\/2))) then {\n\t\tn = WLC(S);\n\t\tif (n is NULL) then return NULL;\n\t\tadd n into ServerSet[dest_ip];\n\t} else\n\tif (|ServerSet[dest_ip]| &gt; 1 AND\n\t    Now - ServerSet[dest_ip].lastmod &gt; T) then {\n\t\tm = WGC(ServerSet[dest_ip]);\n\t\tremove m from ServerSet[dest_ip];\n\t}\n}\nServerSet[dest_ip].lastuse = Now;\nif (ServerSet[dest_ip] changed) then\n\tServerSet[dest_ip].lastmod = Now;\nreturn n;\n<\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6b64\u5916\uff0c\u5bf9\u5173\u8054\u53d8\u91cfServerSet[dest_ip]\u4e5f\u8981\u8fdb\u884c\u5468\u671f\u6027\u7684\u5783\u573e\u56de\u6536\uff08Garbage Collection\uff09\uff0c\u5c06\u8fc7\u671f\u7684\u76ee\u6807IP\u5730\u5740\u5230\u670d\u52a1\u5668\u5173\u8054\u9879\u8fdb\u884c\u56de\u6536\u3002\u8fc7\u671f\u7684\u5173\u8054\u9879\u662f\u6307\u54ea\u4e9b\u5f53\u524d\u65f6\u95f4\uff08\u5b9e\u73b0\u65f6\u91c7\u7528\u7cfb\u7edf\u65f6\u949f\u8282\u62cd\u6570jiffies\uff09\u51cf\u53bb\u6700 \u8fd1\u4f7f\u7528\u65f6\u95f4\uff08lastuse\uff09\u8d85\u8fc7\u8bbe\u5b9a\u8fc7\u671f\u65f6\u95f4\u7684\u5173\u8054\u9879\uff0c\u7cfb\u7edf\u7f3a\u7701\u7684\u8bbe\u5b9a\u8fc7\u671f\u65f6\u95f4\u4e3a24\u5c0f\u65f6\u3002<br \/>\n<span class=\\\"atitle3\\\">2.7. \u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6<\/span><br \/>\n\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\uff08Destination Hashing Scheduling\uff09\u7b97\u6cd5\u4e5f\u662f\u9488\u5bf9\u76ee\u6807IP\u5730\u5740\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u4f46\u5b83\u662f\u4e00\u79cd\u9759\u6001\u6620\u5c04\u7b97\u6cd5\uff0c\u901a\u8fc7\u4e00\u4e2a\u6563\u5217\uff08Hash\uff09\u51fd\u6570\u5c06\u4e00\u4e2a\u76ee\u6807IP\u5730\u5740\u6620\u5c04\u5230\u4e00\u53f0\u670d\u52a1\u5668\u3002<br \/>\n\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\u7b97\u6cd5\u5148\u6839\u636e\u8bf7\u6c42\u7684\u76ee\u6807IP\u5730\u5740\uff0c\u4f5c\u4e3a\u6563\u5217\u952e\uff08Hash Key\uff09\u4ece\u9759\u6001\u5206\u914d\u7684\u6563\u5217\u8868\u627e\u51fa\u5bf9\u5e94\u7684\u670d\u52a1\u5668\uff0c\u82e5\u8be5\u670d\u52a1\u5668\u662f\u53ef\u7528\u7684\u4e14\u672a\u8d85\u8f7d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\uff0c\u5426\u5219\u8fd4\u56de\u7a7a\u3002\u8be5\u7b97\u6cd5\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<br \/>\n<b>\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\u7b97\u6cd5\u6d41\u7a0b<\/b><\/p>\n<table border=\\\"1\\\" width=\\\"100%\\\" cellspacing=\\\"0\\\" cellpadding=\\\"5\\\" bgcolor=\\\"#cccccc\\\">\n<tbody>\n<tr>\n<td>\n<pre><code>\n\u5047\u8bbe\u6709\u4e00\u7ec4\u670d\u52a1\u5668S = {S0, S1, ..., Sn-1}\uff0cW(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u6743\u503c\uff0c\nC(Si)\u8868\u793a\u670d\u52a1\u5668Si\u7684\u5f53\u524d\u8fde\u63a5\u6570\u3002ServerNode[]\u662f\u4e00\u4e2a\u6709256\u4e2a\u6876\uff08Bucket\uff09\u7684\nHash\u8868\uff0c\u4e00\u822c\u6765\u8bf4\u670d\u52a1\u5668\u7684\u6570\u76ee\u4f1a\u8fd0\u5c0f\u4e8e256\uff0c\u5f53\u7136\u8868\u7684\u5927\u5c0f\u4e5f\u662f\u53ef\u4ee5\u8c03\u6574\u7684\u3002\n\u7b97\u6cd5\u7684\u521d\u59cb\u5316\u662f\u5c06\u6240\u6709\u670d\u52a1\u5668\u987a\u5e8f\u3001\u5faa\u73af\u5730\u653e\u7f6e\u5230ServerNode\u8868\u4e2d\u3002\u82e5\u670d\u52a1\u5668\u7684\n\u8fde\u63a5\u6570\u76ee\u5927\u4e8e2\u500d\u7684\u6743\u503c\uff0c\u5219\u8868\u793a\u670d\u52a1\u5668\u5df2\u8d85\u8f7d\u3002\nn = ServerNode[hashkey(dest_ip)];\nif ((n is dead) OR\n\t(W(n) == 0) OR\n    (C(n) &gt; 2*W(n))) then\n\treturn NULL;\nreturn n;\n<\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5728\u5b9e\u73b0\u65f6\uff0c\u6211\u4eec\u91c7\u7528\u7d20\u6570\u4e58\u6cd5Hash\u51fd\u6570\uff0c\u901a\u8fc7\u4e58\u4ee5\u7d20\u6570\u4f7f\u5f97\u6563\u5217\u952e\u503c\u5c3d\u53ef\u80fd\u5730\u8fbe\u5230\u8f83\u5747\u5300\u7684\u5206\u5e03\u3002\u6240\u91c7\u7528\u7684\u7d20\u6570\u4e58\u6cd5Hash\u51fd\u6570\u5982\u4e0b\uff1a<br \/>\n<b>\u7d20\u6570\u4e58\u6cd5Hash\u51fd\u6570<\/b><\/p>\n<table border=\\\"1\\\" width=\\\"100%\\\" cellspacing=\\\"0\\\" cellpadding=\\\"5\\\" bgcolor=\\\"#cccccc\\\">\n<tbody>\n<tr>\n<td>\n<pre><code>\nstatic inline unsigned hashkey(unsigned int dest_ip)\n{\n    return (dest_ip* 2654435761UL) &amp; HASH_TAB_MASK;\n}\n\u5176\u4e2d\uff0c2654435761UL\u662f2\u52302^32 (4294967296)\u95f4\u63a5\u8fd1\u4e8e\u9ec4\u91d1\u5206\u5272\u7684\u7d20\u6570\uff0c\n  (sqrt(5) - 1) \/ 2 =  0.618033989\n  2654435761 \/ 4294967296 = 0.618033987\n<\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span class=\\\"atitle3\\\">2.8. \u6e90\u5730\u5740\u6563\u5217\u8c03\u5ea6<\/span><br \/>\n\u6e90\u5730\u5740\u6563\u5217\u8c03\u5ea6\uff08Source Hashing Scheduling\uff09\u7b97\u6cd5\u6b63\u597d\u4e0e\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\u7b97\u6cd5\u76f8\u53cd\uff0c\u5b83\u6839\u636e\u8bf7\u6c42\u7684\u6e90IP\u5730\u5740\uff0c\u4f5c\u4e3a\u6563\u5217\u952e\uff08Hash Key\uff09\u4ece\u9759\u6001\u5206\u914d\u7684\u6563\u5217\u8868\u627e\u51fa\u5bf9\u5e94\u7684\u670d\u52a1\u5668\uff0c\u82e5\u8be5\u670d\u52a1\u5668\u662f\u53ef\u7528\u7684\u4e14\u672a\u8d85\u8f7d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\uff0c\u5426\u5219\u8fd4\u56de\u7a7a\u3002\u5b83\u91c7\u7528\u7684\u6563\u5217\u51fd\u6570\u4e0e\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\u7b97\u6cd5 \u7684\u76f8\u540c\u3002\u5b83\u7684\u7b97\u6cd5\u6d41\u7a0b\u4e0e\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\u7b97\u6cd5\u7684\u57fa\u672c\u76f8\u4f3c\uff0c\u9664\u4e86\u5c06\u8bf7\u6c42\u7684\u76ee\u6807IP\u5730\u5740\u6362\u6210\u8bf7\u6c42\u7684\u6e90IP\u5730\u5740\uff0c\u6240\u4ee5\u8fd9\u91cc\u4e0d\u4e00\u4e00\u53d9\u8ff0\u3002<br \/>\n\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6e90\u5730\u5740\u6563\u5217\u8c03\u5ea6\u548c\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\u53ef\u4ee5\u7ed3\u5408\u4f7f\u7528\u5728\u9632\u706b\u5899\u96c6\u7fa4\u4e2d\uff0c\u5b83\u4eec\u53ef\u4ee5\u4fdd\u8bc1\u6574\u4e2a\u7cfb\u7edf\u7684\u552f\u4e00\u51fa\u5165\u53e3\u3002<br \/>\n<strong><span class=\\\"atitle2\\\">3. \u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5<\/span><\/strong><br \/>\n\u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\u8003\u8651\u670d\u52a1\u5668\u7684\u5b9e\u65f6\u8d1f\u8f7d\u548c\u54cd\u5e94\u60c5\u51b5\uff0c\u4e0d\u65ad\u8c03\u6574\u670d\u52a1\u5668\u95f4\u5904\u7406\u8bf7\u6c42\u7684\u6bd4\u4f8b\uff0c\u6765\u907f\u514d\u6709\u4e9b\u670d\u52a1\u5668\u8d85\u8f7d\u65f6\u4f9d\u7136\u6536\u5230\u5927\u91cf\u8bf7\u6c42\uff0c\u4ece\u800c\u63d0 \u9ad8\u6574\u4e2a\u7cfb\u7edf\u7684\u541e\u5410\u7387\u3002\u56fe1\u663e\u793a\u4e86\u8be5\u7b97\u6cd5\u7684\u5de5\u4f5c\u73af\u5883\uff0c\u5728\u8d1f\u8f7d\u8c03\u5ea6\u5668\u4e0a\u8fd0\u884cMonitor Daemon\u8fdb\u7a0b\uff0cMonitor Daemon\u6765\u76d1\u89c6\u548c\u6536\u96c6\u5404\u4e2a\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\u4fe1\u606f\u3002Monitor Daemon\u53ef\u6839\u636e\u591a\u4e2a\u8d1f\u8f7d\u4fe1\u606f\u7b97\u51fa\u4e00\u4e2a\u7efc\u5408\u8d1f\u8f7d\u503c\u3002Monitor Daemon\u5c06\u5404\u4e2a\u670d\u52a1\u5668\u7684\u7efc\u5408\u8d1f\u8f7d\u503c\u548c\u5f53\u524d\u6743\u503c\u7b97\u51fa\u4e00\u7ec4\u65b0\u7684\u6743\u503c\uff0c\u82e5\u65b0\u6743\u503c\u548c\u5f53\u524d\u6743\u503c\u7684\u5dee\u503c\u5927\u4e8e\u8bbe\u5b9a\u7684\u9600\u503c\uff0cMonitor Daemon\u5c06\u8be5\u670d\u52a1\u5668\u7684\u6743\u503c\u8bbe\u7f6e\u5230\u5185\u6838\u4e2d\u7684IPVS\u8c03\u5ea6\u4e2d\uff0c\u800c\u5728\u5185\u6838\u4e2d\u8fde\u63a5\u8c03\u5ea6\u4e00\u822c\u91c7\u7528\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u6216\u8005\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\u3002<br \/>\n<center><img src=\\\"http:\/\/www.linuxvirtualserver.org\/zh\/lvs4\/load-manager.jpg\\\" alt=\\\"\u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\u7684\u5de5\u4f5c\u73af\u5883\\\" \/><br \/>\n<b>\u56fe1\uff1a\u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\u7684\u5de5\u4f5c\u73af\u5883<\/b><\/center><span class=\\\"atitle3\\\">3.1. \u8fde\u63a5\u8c03\u5ea6<\/span><br \/>\n\u5f53\u5ba2\u6237\u901a\u8fc7TCP\u8fde\u63a5\u8bbf\u95ee\u7f51\u7edc\u8bbf\u95ee\u65f6\uff0c\u670d\u52a1\u6240\u9700\u7684\u65f6\u95f4\u548c\u6240\u8981\u6d88\u8017\u7684\u8ba1\u7b97\u8d44\u6e90\u662f\u5343\u5dee\u4e07\u522b\u7684\uff0c\u5b83\u4f9d\u8d56\u4e8e\u5f88\u591a\u56e0\u7d20\u3002\u4f8b\u5982\uff0c\u5b83\u4f9d\u8d56\u4e8e\u8bf7\u6c42\u7684\u670d\u52a1\u7c7b\u578b\u3001\u5f53\u524d\u7f51 \u7edc\u5e26\u5bbd\u7684\u60c5\u51b5\u3001\u4ee5\u53ca\u5f53\u524d\u670d\u52a1\u5668\u8d44\u6e90\u5229\u7528\u7684\u60c5\u51b5\u3002\u4e00\u4e9b\u8d1f\u8f7d\u6bd4\u8f83\u91cd\u7684\u8bf7\u6c42\u9700\u8981\u8fdb\u884c\u8ba1\u7b97\u5bc6\u96c6\u7684\u67e5\u8be2\u3001\u6570\u636e\u5e93\u8bbf\u95ee\u3001\u5f88\u957f\u54cd\u5e94\u6570\u636e\u6d41\uff1b\u800c\u8d1f\u8f7d\u6bd4\u8f83\u8f7b\u7684\u8bf7\u6c42\u5f80\u5f80\u53ea\u9700\u8981 \u8bfb\u4e00\u4e2aHTML\u9875\u9762\u6216\u8005\u8fdb\u884c\u5f88\u7b80\u5355\u7684\u8ba1\u7b97\u3002<br \/>\n\u8bf7\u6c42\u5904\u7406\u65f6\u95f4\u7684\u5343\u5dee\u4e07\u522b\u53ef\u80fd\u4f1a\u5bfc\u81f4\u670d\u52a1\u5668\u5229\u7528\u7684\u503e\u659c\uff08Skew\uff09\uff0c\u5373\u670d\u52a1\u5668\u95f4\u7684\u8d1f\u8f7d\u4e0d\u5e73\u8861\u3002\u4f8b\u5982\uff0c\u6709\u4e00\u4e2aWEB\u9875\u9762\u6709A\u3001B\u3001C\u548cD\u6587\u4ef6\uff0c\u5176\u4e2dD\u662f \u5927\u56fe\u50cf\u6587\u4ef6\uff0c\u6d4f\u89c8\u5668\u9700\u8981\u5efa\u7acb\u56db\u4e2a\u8fde\u63a5\u6765\u53d6\u8fd9\u4e9b\u6587\u4ef6\u3002\u5f53\u591a\u4e2a\u7528\u6237\u901a\u8fc7\u6d4f\u89c8\u5668\u540c\u65f6\u8bbf\u95ee\u8be5\u9875\u9762\u65f6\uff0c\u6700\u6781\u7aef\u7684\u60c5\u51b5\u662f\u6240\u6709D\u6587\u4ef6\u7684\u8bf7\u6c42\u88ab\u53d1\u5230\u540c\u4e00\u53f0\u670d\u52a1\u5668\u3002\u6240\u4ee5\u8bf4\uff0c \u6709\u53ef\u80fd\u5b58\u5728\u8fd9\u6837\u60c5\u51b5\uff0c\u6709\u4e9b\u670d\u52a1\u5668\u5df2\u7ecf\u8d85\u8d1f\u8377\u8fd0\u884c\uff0c\u800c\u5176\u4ed6\u670d\u52a1\u5668\u57fa\u672c\u662f\u95f2\u7f6e\u7740\u3002\u540c\u65f6\uff0c\u6709\u4e9b\u670d\u52a1\u5668\u5df2\u7ecf\u5fd9\u4e0d\u8fc7\u6765\uff0c\u6709\u5f88\u957f\u7684\u8bf7\u6c42\u961f\u5217\uff0c\u8fd8\u4e0d\u65ad\u5730\u6536\u5230\u65b0\u7684\u8bf7\u6c42\u3002\u53cd \u8fc7\u6765\u8bf4\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u5ba2\u6237\u957f\u65f6\u95f4\u7684\u7b49\u5f85\uff0c\u89c9\u5f97\u7cfb\u7edf\u7684\u670d\u52a1\u8d28\u91cf\u5dee\u3002<br \/>\n<span class=\\\"atitle4\\\">3.1.1. \u7b80\u5355\u8fde\u63a5\u8c03\u5ea6<\/span><br \/>\n\u7b80\u5355\u8fde\u63a5\u8c03\u5ea6\u53ef\u80fd\u4f1a\u4f7f\u5f97\u670d\u52a1\u5668\u503e\u659c\u7684\u53d1\u751f\u3002\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u82e5\u91c7\u7528\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\uff0c\u4e14\u96c6\u7fa4\u4e2d\u6b63\u597d\u6709\u56db\u53f0\u670d\u52a1\u5668\uff0c\u5fc5\u6709\u4e00\u53f0\u670d\u52a1\u5668\u603b\u662f\u6536\u5230D\u6587\u4ef6\u7684\u8bf7\u6c42\u3002\u8fd9\u79cd\u8c03\u5ea6\u7b56\u7565\u4f1a\u5bfc\u81f4\u6574\u4e2a\u7cfb\u7edf\u8d44\u6e90\u7684\u4f4e\u5229\u7528\u7387\uff0c\u56e0\u4e3a\u6709\u4e9b\u8d44\u6e90\u88ab\u7528\u5c3d\u5bfc\u81f4\u5ba2\u6237\u7684\u957f\u65f6\u95f4\u7b49\u5f85\uff0c\u800c\u5176\u4ed6\u8d44\u6e90\u7a7a\u95f2\u7740\u3002<br \/>\n<span class=\\\"atitle4\\\">3.1.2. \u5b9e\u9645TCP\/IP\u6d41\u91cf\u7684\u7279\u5f81<\/span><br \/>\n\u6587\u732e[1]\u8bf4\u660e\u7f51\u7edc\u6d41\u91cf\u662f\u5448\u6ce2\u6d6a\u578b\u53d1\u751f\u7684\uff0c\u5728\u4e00\u6bb5\u8f83\u957f\u65f6\u95f4\u7684\u5c0f\u6d41\u91cf\u540e\uff0c\u4f1a\u6709\u4e00\u6bb5\u5927\u6d41\u91cf\u7684\u8bbf\u95ee\uff0c\u7136\u540e\u662f\u5c0f\u6d41\u91cf\uff0c\u8fd9\u6837\u8ddf\u6ce2\u6d6a\u4e00\u6837\u5468\u671f\u6027\u5730\u53d1\u751f\u3002\u6587\u732e [2,3,4,5]\u63ed\u793a\u5728WAN\u548cLAN\u4e0a\u7f51\u7edc\u6d41\u91cf\u5b58\u5728\u81ea\u76f8\u4f3c\u7684\u7279\u5f81\uff0c\u5728WEB\u8bbf\u95ee\u6d41\u4e5f\u5b58\u5728\u81ea\u76f8\u4f3c\u6027\u3002\u8fd9\u5c31\u9700\u8981\u4e00\u4e2a\u52a8\u6001\u53cd\u9988\u673a\u5236\uff0c\u5229\u7528\u670d\u52a1\u5668\u7ec4\u7684\u72b6\u6001\u6765\u5e94 \u5bf9\u8bbf\u95ee\u6d41\u7684\u81ea\u76f8\u4f3c\u6027\u3002<br \/>\n<span class=\\\"atitle3\\\">3.2. \u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u673a\u5236<\/span><br \/>\nTCP\/IP\u6d41\u91cf\u7684\u7279\u5f81\u901a\u4fd7\u5730\u8bf4\u662f\u6709\u8bb8\u591a\u77ed\u4e8b\u52a1\u548c\u4e00\u4e9b\u957f\u4e8b\u52a1\u7ec4\u6210\uff0c\u800c\u957f\u4e8b\u52a1\u7684\u5de5\u4f5c\u91cf\u5728\u6574\u4e2a\u5de5\u4f5c\u91cf\u5360\u6709\u8f83\u9ad8\u7684\u6bd4\u4f8b\u3002\u6240\u4ee5\uff0c\u6211\u4eec\u8981\u8bbe\u8ba1\u4e00\u79cd\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\uff0c\u6765\u907f\u514d\u957f\u4e8b\u52a1\u7684\u8bf7\u6c42\u603b\u88ab\u5206\u914d\u5230\u4e00\u4e9b\u673a\u5668\u4e0a\uff0c\u800c\u662f\u5c3d\u53ef\u80fd\u5c06\u5e26\u6709\u6bdb\u523a\uff08Burst\uff09\u7684\u5206\u5e03\u5206\u5272\u6210\u76f8\u5bf9\u8f83\u5747\u5300\u7684\u5206\u5e03\u3002<br \/>\n\u6211\u4eec\u63d0\u51fa\u57fa\u4e8e\u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u673a\u5236\uff0c\u6765\u63a7\u5236\u65b0\u8fde\u63a5\u7684\u5206\u914d\uff0c\u4ece\u800c\u63a7\u5236\u5404\u4e2a\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\u3002\u4f8b\u5982\uff0c\u5728IPVS\u8c03\u5ea6\u5668\u7684\u5185\u6838\u4e2d\u4f7f\u7528\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6 \uff08Weighted Round-Robin Scheduling\uff09\u7b97\u6cd5\u6765\u8c03\u5ea6\u65b0\u7684\u8bf7\u6c42\u8fde\u63a5\uff1b\u5728\u8d1f\u8f7d\u8c03\u5ea6\u5668\u7684\u7528\u6237\u7a7a\u95f4\u4e2d\u8fd0\u884cMonitor Daemon\u3002Monitor Daemon\u5b9a\u65f6\u5730\u76d1\u89c6\u548c\u6536\u96c6\u5404\u4e2a\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\u4fe1\u606f\uff0c\u6839\u636e\u591a\u4e2a\u8d1f\u8f7d\u4fe1\u606f\u7b97\u51fa\u4e00\u4e2a\u7efc\u5408\u8d1f\u8f7d\u503c\u3002Monitor Daemon\u5c06\u5404\u4e2a\u670d\u52a1\u5668\u7684\u7efc\u5408\u8d1f\u8f7d\u503c\u548c\u5f53\u524d\u6743\u503c\u7b97\u51fa\u4e00\u7ec4\u65b0\u7684\u6743\u503c\u3002\u5f53\u7efc\u5408\u8d1f\u8f7d\u503c\u8868\u793a\u670d\u52a1\u5668\u6bd4\u8f83\u5fd9\u65f6\uff0c\u65b0\u7b97\u51fa\u7684\u6743\u503c\u4f1a\u6bd4\u5176\u5f53\u524d\u6743\u503c\u8981\u5c0f\uff0c\u8fd9\u6837\u65b0\u5206\u914d\u5230\u8be5\u670d \u52a1\u5668\u7684\u8bf7\u6c42\u6570\u5c31\u4f1a\u5c11\u4e00\u4e9b\u3002\u5f53\u7efc\u5408\u8d1f\u8f7d\u503c\u8868\u793a\u670d\u52a1\u5668\u5904\u4e8e\u4f4e\u5229\u7528\u7387\u65f6\uff0c\u65b0\u7b97\u51fa\u7684\u6743\u503c\u4f1a\u6bd4\u5176\u5f53\u524d\u6743\u503c\u8981\u5927\uff0c\u6765\u589e\u52a0\u65b0\u5206\u914d\u5230\u8be5\u670d\u52a1\u5668\u7684\u8bf7\u6c42\u6570\u3002\u82e5\u65b0\u6743\u503c\u548c\u5f53\u524d\u6743\u503c \u7684\u5dee\u503c\u5927\u4e8e\u8bbe\u5b9a\u7684\u9600\u503c\uff0cMonitor Daemon\u5c06\u8be5\u670d\u52a1\u5668\u7684\u6743\u503c\u8bbe\u7f6e\u5230\u5185\u6838\u4e2d\u7684IPVS\u8c03\u5ea6\u4e2d\u3002\u8fc7\u4e86\u4e00\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\uff08\u59822\u79d2\u949f\uff09\uff0cMonitor Daemon\u518d\u67e5\u8be2\u5404\u4e2a\u670d\u52a1\u5668\u7684\u60c5\u51b5\uff0c\u5e76\u76f8\u5e94\u8c03\u6574\u670d\u52a1\u5668\u7684\u6743\u503c\uff1b\u8fd9\u6837\u5468\u671f\u6027\u5730\u8fdb\u884c\u3002\u53ef\u4ee5\u8bf4\uff0c\u8fd9\u662f\u4e00\u4e2a\u8d1f\u53cd\u9988\u673a\u5236\uff0c\u4f7f\u5f97\u670d\u52a1\u5668\u4fdd\u6301\u8f83\u597d\u7684\u5229\u7528\u7387\u3002<br \/>\n\u5728\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\u7b97\u6cd5\u4e2d\uff0c\u5f53\u670d\u52a1\u5668\u7684\u6743\u503c\u4e3a\u96f6\uff0c\u5df2\u5efa\u7acb\u7684\u8fde\u63a5\u4f1a\u7ee7\u7eed\u5f97\u5230\u8be5\u670d\u52a1\u5668\u7684\u670d\u52a1\uff0c\u800c\u65b0\u7684\u8fde\u63a5\u4e0d\u4f1a\u5206\u914d\u5230\u8be5\u670d\u52a1\u5668\u3002\u7cfb\u7edf\u7ba1\u7406\u5458\u53ef\u4ee5\u5c06\u4e00\u53f0\u670d\u52a1\u5668\u7684 \u6743\u503c\u8bbe\u7f6e\u4e3a\u96f6\uff0c\u4f7f\u5f97\u8be5\u670d\u52a1\u5668\u5b89\u9759\u4e0b\u6765\uff0c\u5f53\u5df2\u6709\u7684\u8fde\u63a5\u90fd\u7ed3\u675f\u540e\uff0c\u4ed6\u53ef\u4ee5\u5c06\u8be5\u670d\u52a1\u5668\u5207\u51fa\uff0c\u5bf9\u5176\u8fdb\u884c\u7ef4\u62a4\u3002\u7ef4\u62a4\u5de5\u4f5c\u5bf9\u7cfb\u7edf\u90fd\u662f\u4e0d\u53ef\u5c11\u7684\uff0c\u6bd4\u5982\u786c\u4ef6\u5347\u7ea7\u548c\u8f6f\u4ef6\u66f4\u65b0 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\/>\n\u8f93\u5165\u6307\u6807\u4e3b\u8981\u662f\u5728\u5355\u4f4d\u65f6\u95f4\u5185\u670d\u52a1\u5668\u6536\u5230\u65b0\u8fde\u63a5\u6570\u4e0e\u5e73\u5747\u8fde\u63a5\u6570\u7684\u6bd4\u4f8b\uff0c\u5b83\u662f\u5728\u8c03\u5ea6\u5668\u4e0a\u6536\u96c6\u5230\u7684\uff0c\u6240\u4ee5\u8fd9\u4e2a\u6307\u6807\u662f\u5bf9\u670d\u52a1\u5668\u8d1f\u8f7d\u60c5\u51b5\u7684\u4e00\u4e2a\u4f30\u8ba1\u503c\u3002\u5728\u8c03\u5ea6 \u5668\u4e0a\u6709\u5404\u4e2a\u670d\u52a1\u5668\u6536\u5230\u8fde\u63a5\u6570\u7684\u8ba1\u6570\u5668\uff0c\u5bf9\u4e8e\u670d\u52a1\u5668Si\uff0c\u53ef\u4ee5\u5f97\u5230\u5206\u522b\u5728\u65f6\u95f4T1\u548cT2\u65f6\u7684\u8ba1\u6570\u5668\u503cCi1\u548cCi2\uff0c\u8ba1\u7b97\u51fa\u5728\u65f6\u95f4\u95f4\u9694T2-T1\u5185\u670d\u52a1\u5668 Si\u6536\u5230\u65b0\u8fde\u63a5\u6570Ni = Ci2 &#8211; Ci1\u3002\u8fd9\u6837\uff0c\u5f97\u5230\u4e00\u7ec4\u670d\u52a1\u5668\u5728\u65f6\u95f4\u95f4\u9694T2-T1\u5185\u670d\u52a1\u5668Si\u6536\u5230\u65b0\u8fde\u63a5\u6570{Ni}\uff0c\u670d\u52a1\u5668Si\u7684\u8f93\u5165\u6307\u6807INPUTi\u4e3a\u5176\u65b0\u8fde\u63a5\u6570\u4e0en\u53f0\u670d\u52a1\u5668\u6536\u5230\u5e73 \u5747\u8fde\u63a5\u6570\u7684\u6bd4\u503c\uff0c\u5176\u516c\u5f0f\u4e3a<br \/>\n<center><img src=\\\"http:\/\/www.linuxvirtualserver.org\/zh\/lvs4\/input-formula.gif\\\" alt=\\\"\\\" \/><\/center>\u670d\u52a1\u5668\u6307\u6807\u4e3b\u8981\u8bb0\u5f55\u670d\u52a1\u5668\u5404\u79cd\u8d1f\u8f7d\u4fe1\u606f\uff0c\u5982\u670d\u52a1\u5668\u5f53\u524dCPU\u8d1f\u8f7dLOADi\u3001\u670d\u52a1\u5668\u5f53\u524d\u78c1\u76d8\u4f7f\u7528\u60c5\u51b5Di\u3001\u5f53\u524d\u5185\u5b58\u5229\u7528\u60c5\u51b5Mi\u548c\u5f53\u524d\u8fdb\u7a0b\u6570\u76ee Pi\u3002\u6709\u4e24\u79cd\u65b9\u6cd5\u53ef\u4ee5\u83b7\u5f97\u8fd9\u4e9b\u4fe1\u606f\uff1b\u4e00\u662f\u5728\u6240\u6709\u7684\u670d\u52a1\u5668\u4e0a\u8fd0\u884c\u7740SNMP\uff08Simple Network Management Protocol\uff09\u670d\u52a1\u8fdb\u7a0b\uff0c\u800c\u5728\u8c03\u5ea6\u5668\u4e0a\u7684Monitor Daemon\u901a\u8fc7SNMP\u5411\u5404\u4e2a\u670d\u52a1\u5668\u67e5\u8be2\u83b7\u5f97\u8fd9\u4e9b\u4fe1\u606f\uff1b\u4e8c\u662f\u5728\u670d\u52a1\u5668\u4e0a\u5b9e\u73b0\u548c\u8fd0\u884c\u6536\u96c6\u4fe1\u606f\u7684Agent\uff0c\u7531Agent\u5b9a\u65f6\u5730\u5411Monitor Daemon\u62a5\u544a\u8d1f\u8f7d\u4fe1\u606f\u3002\u82e5\u670d\u52a1\u5668\u5728\u8bbe\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u5185\u6ca1\u6709\u54cd\u5e94\uff0cMonitor Daemon\u8ba4\u4e3a\u670d\u52a1\u5668\u662f\u4e0d\u53ef\u8fbe\u7684\uff0c\u5c06\u670d\u52a1\u5668\u5728\u8c03\u5ea6\u5668\u4e2d\u7684\u6743\u503c\u8bbe\u7f6e\u4e3a\u96f6\uff0c\u4e0d\u4f1a\u6709\u65b0\u7684\u8fde\u63a5\u518d\u88ab\u5206\u914d\u5230\u8be5\u670d\u52a1\u5668\uff1b\u82e5\u5728\u4e0b\u4e00\u6b21\u670d\u52a1\u5668\u6709\u54cd\u5e94\uff0c\u518d\u5bf9\u670d\u52a1\u5668\u7684\u6743\u503c\u8fdb \u884c\u8c03\u6574\u3002\u518d\u5bf9\u8fd9\u4e9b\u6570\u636e\u8fdb\u884c\u5904\u7406\uff0c\u4f7f\u5176\u843d\u5728[0, \u221e)\u7684\u533a\u95f4\u5185\uff0c1\u8868\u793a\u8d1f\u8f7d\u6b63\u597d\uff0c\u5927\u4e8e1\u8868\u793a\u670d\u52a1\u5668\u8d85\u8f7d\uff0c\u5c0f\u4e8e1\u8868\u793a\u670d\u52a1\u5668\u5904\u4e8e\u4f4e\u8d1f\u8f7d\u72b6\u6001\u3002\u83b7\u5f97\u8c03\u6574\u540e\u7684\u6570\u636e\u6709DISKi\u3001MEMORYi\u548c PROCESSi\u3002<br \/>\n\u53e6\u4e00\u4e2a\u91cd\u8981\u7684\u670d\u52a1\u5668\u6307\u6807\u662f\u670d\u52a1\u5668\u6240\u63d0\u4f9b\u670d\u52a1\u7684\u54cd\u5e94\u65f6\u95f4\uff0c\u5b83\u80fd\u6bd4\u8f83\u597d\u5730\u53cd\u6620\u670d\u52a1\u5668\u4e0a\u8bf7\u6c42\u7b49\u5f85\u961f\u5217\u7684\u957f\u5ea6\u548c\u8bf7\u6c42\u7684\u5904\u7406\u65f6\u95f4\u3002\u8c03\u5ea6\u5668\u4e0a\u7684Monitor Daemon\u4f5c\u4e3a\u5ba2\u6237\u8bbf\u95ee\u670d\u52a1\u5668\u6240\u63d0\u4f9b\u7684\u670d\u52a1\uff0c\u6d4b\u5f97\u5176\u54cd\u5e94\u65f6\u95f4\u3002\u4f8b\u5982\uff0c\u6d4b\u8bd5\u4eceWEB\u670d\u52a1\u5668\u53d6\u4e00\u4e2aHTML\u9875\u9762\u7684\u54cd\u5e94\u5ef6\u65f6\uff0cMonitor Daemon\u53ea\u8981\u53d1\u9001\u4e00\u4e2a\u201cGET \/\u201d\u8bf7\u6c42\u5230\u6bcf\u4e2a\u670d\u52a1\u5668\uff0c\u7136\u540e\u8bb0\u5f55\u54cd\u5e94\u65f6\u95f4\u3002\u82e5\u670d\u52a1\u5668\u5728\u8bbe\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u5185\u6ca1\u6709\u54cd\u5e94\uff0cMonitor Daemon\u8ba4\u4e3a\u670d\u52a1\u5668\u662f\u4e0d\u53ef\u8fbe\u7684\uff0c\u5c06\u670d\u52a1\u5668\u5728\u8c03\u5ea6\u5668\u4e2d\u7684\u6743\u503c\u8bbe\u7f6e\u4e3a\u96f6\u3002\u540c\u6837\uff0c\u6211\u4eec\u5bf9\u54cd\u5e94\u65f6\u95f4\u8fdb\u884c\u5982\u4e0a\u8c03\u6574\uff0c\u5f97\u5230RESPONSEi\u3002<br \/>\n\u8fd9\u91cc\uff0c\u6211\u4eec\u5f15\u5165\u4e00\u7ec4\u53ef\u4ee5\u52a8\u6001\u8c03\u6574\u7684\u7cfb\u6570Ri\u6765\u8868\u793a\u5404\u4e2a\u8d1f\u8f7d\u53c2\u6570\u7684\u91cd\u8981\u7a0b\u5ea6\uff0c\u5176\u4e2d\u03a3Ri = 1\u3002\u7efc\u5408\u8d1f\u8f7d\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97\u51fa\uff1a<br \/>\n<center><img src=\\\"http:\/\/www.linuxvirtualserver.org\/zh\/lvs4\/agload-formula.gif\\\" alt=\\\"\\\" \/><\/center>\u4f8b\u5982\uff0c\u5728WEB\u670d\u52a1\u5668\u96c6\u7fa4\u4e2d\uff0c\u6211\u4eec\u91c7\u7528\u4ee5\u4e0b\u7cfb\u6570{0.1, 0.3, 0.1, 0.1, 0.1, 0.3}\uff0c\u8ba4\u4e3a\u670d\u52a1\u5668\u7684CPU\u8d1f\u8f7d\u548c\u8bf7\u6c42\u54cd\u5e94\u65f6\u95f4\u8f83\u5176\u4ed6\u53c2\u6570\u91cd\u8981\u4e00\u4e9b\u3002\u82e5\u5f53\u524d\u7684\u7cfb\u6570Ri\u4e0d\u80fd\u5f88\u597d\u5730\u53cd\u6620\u5e94\u7528\u7684\u8d1f\u8f7d\uff0c\u7cfb\u7edf\u7ba1\u7406\u5458\u53ef\u4ee5\u5bf9\u7cfb\u6570\u4e0d\u65ad\u5730\u4fee\u6b63\uff0c\u76f4\u5230 \u627e\u5230\u8d34\u8fd1\u5f53\u524d\u5e94\u7528\u7684\u4e00\u7ec4\u7cfb\u6570\u3002<br \/>\n\u53e6\u5916\uff0c\u5173\u4e8e\u67e5\u8be2\u65f6\u95f4\u95f4\u9694\u7684\u8bbe\u7f6e\uff0c\u867d\u7136\u5f88\u77ed\u7684\u95f4\u9694\u53ef\u4ee5\u66f4\u786e\u5207\u5730\u53cd\u6620\u5404\u4e2a\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\uff0c\u4f46\u662f\u5f88\u9891\u7e41\u5730\u67e5\u8be2\uff08\u59821\u79d2\u949f\u51e0\u6b21\uff09\u4f1a\u7ed9\u8c03\u5ea6\u5668\u548c\u670d\u52a1\u5668\u5e26\u6765\u4e00\u5b9a\u7684 \u8d1f\u8f7d\uff0c\u5982\u9891\u7e41\u6267\u884c\u7684Monitor Daemon\u5728\u8c03\u5ea6\u5668\u4f1a\u6709\u4e00\u5b9a\u7684\u5f00\u9500\uff0c\u540c\u6837\u9891\u7e41\u5730\u67e5\u8be2\u670d\u52a1\u5668\u6307\u6807\u4f1a\u670d\u52a1\u5668\u5e26\u6765\u4e00\u5b9a\u7684\u5f00\u9500\u3002\u6240\u4ee5\uff0c\u8fd9\u91cc\u8981\u6709\u4e2a\u6298\u8877\uff08Tradeoff\uff09\uff0c\u6211\u4eec\u4e00\u822c\u5efa\u8bae\u5c06\u65f6\u95f4 \u95f4\u9694\u8bbe\u7f6e\u57285\u523020\u79d2\u4e4b\u95f4\u3002<br \/>\n<span class=\\\"atitle3\\\">3.4. \u6743\u503c\u8ba1\u7b97<\/span><br \/>\n\u5f53\u670d\u52a1\u5668\u6295\u5165\u96c6\u7fa4\u7cfb\u7edf\u4e2d\u4f7f\u7528\u65f6\uff0c\u7cfb\u7edf\u7ba1\u7406\u5458\u5bf9\u670d\u52a1\u5668\u90fd\u8bbe\u5b9a\u4e00\u4e2a\u521d\u59cb\u6743\u503cDEFAULT_WEIGHTi\uff0c\u5728\u5185\u6838\u7684IPVS\u8c03\u5ea6\u4e2d\u4e5f\u5148\u4f7f\u7528\u8fd9\u4e2a\u6743\u503c\u3002 \u7136\u540e\uff0c\u968f\u7740\u670d\u52a1\u5668\u8d1f\u8f7d\u7684\u53d8\u5316\uff0c\u5bf9\u6743\u503c\u8fdb\u884c\u8c03\u6574\u3002\u4e3a\u4e86\u907f\u514d\u6743\u503c\u53d8\u6210\u4e00\u4e2a\u5f88\u5927\u7684\u503c\uff0c\u6211\u4eec\u5bf9\u6743\u503c\u7684\u8303\u56f4\u4f5c\u4e00\u4e2a\u9650\u5236[DEFAULT_WEIGHTi, SCALE*DEFAULT_WEIGHTi]\uff0cSCALE\u662f\u53ef\u4ee5\u8c03\u6574\u7684\uff0c\u5b83\u7684\u7f3a\u7701\u503c\u4e3a10\u3002<br \/>\nMonitor Daemon\u5468\u671f\u6027\u5730\u8fd0\u884c\uff0c\u82e5DEFAULT_WEIGHTi\u4e0d\u4e3a\u96f6\uff0c\u5219\u67e5\u8be2\u8be5\u670d\u52a1\u5668\u7684\u5404\u8d1f\u8f7d\u53c2\u6570\uff0c\u5e76\u8ba1\u7b97\u51fa\u7efc\u5408\u8d1f\u8f7d\u503cAGGREGATE_LOADi\u3002\u6211\u4eec\u5f15\u5165\u4ee5\u4e0b\u6743\u503c\u8ba1\u7b97\u516c\u5f0f\uff0c\u6839\u636e\u670d\u52a1\u5668\u7684\u7efc\u5408\u8d1f\u8f7d\u503c\u8c03\u6574\u5176\u6743\u503c\u3002<br \/>\n<center><img src=\\\"http:\/\/www.linuxvirtualserver.org\/zh\/lvs4\/weight-formula1.gif\\\" alt=\\\"\\\" \/><\/center>\u5728\u516c\u5f0f\u4e2d\uff0c0.95\u662f\u6211\u4eec\u60f3\u8981\u8fbe\u5230\u7684\u7cfb\u7edf\u5229\u7528\u7387\uff0cA\u662f\u4e00\u4e2a\u53ef\u8c03\u6574\u7684\u7cfb\u6570\uff08\u7f3a\u7701\u503c\u4e3a5\uff09\u3002\u5f53\u7efc\u5408\u8d1f\u8f7d\u503c\u4e3a0.95\u65f6\uff0c\u670d\u52a1\u5668\u6743\u503c\u4e0d\u53d8\uff1b\u5f53\u7efc\u5408\u8d1f\u8f7d\u503c\u5927 \u4e8e0.95\u65f6\uff0c\u6743\u503c\u53d8\u5c0f\uff1b\u5f53\u7efc\u5408\u8d1f\u8f7d\u503c\u5c0f\u4e8e0.95\u65f6\uff0c\u6743\u503c\u53d8\u5927\u3002\u82e5\u65b0\u6743\u503c\u5927\u4e8eSCALE*DEFAULT_WEIGHTi\uff0c\u6211\u4eec\u5c06\u65b0\u6743\u503c\u8bbe\u4e3a SCALE*DEFAULT_WEIGHTi\u3002\u82e5\u65b0\u6743\u503c\u4e0e\u5f53\u524d\u6743\u503c\u7684\u5dee\u5f02\u8d85\u8fc7\u8bbe\u5b9a\u7684\u9600\u503c\uff0c\u5219\u5c06\u65b0\u6743\u503c\u8bbe\u7f6e\u5230\u5185\u6838\u4e2d\u7684IPVS\u8c03\u5ea6\u53c2\u6570\u4e2d\uff0c\u5426\u5219\u907f\u514d\u6253\u65ad IPVS\u8c03\u5ea6\u7684\u5f00\u9500\u3002\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\u8fd9\u662f\u4e00\u4e2a\u8d1f\u53cd\u9988\u516c\u5f0f\uff0c\u4f1a\u4f7f\u5f97\u6743\u503c\u8c03\u6574\u5230\u4e00\u4e2a\u7a33\u5b9a\u70b9\uff0c\u5982\u7cfb\u7edf\u8fbe\u5230\u7406\u60f3\u5229\u7528\u7387\u65f6\uff0c\u6743\u503c\u662f\u4e0d\u53d8\u7684\u3002<br \/>\n\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u82e5\u53d1\u73b0\u6240\u6709\u670d\u52a1\u5668\u7684\u6743\u503c\u90fd\u5c0f\u4e8e\u4ed6\u4eec\u7684DEFAULT_WEIGHT\uff0c\u5219\u8bf4\u660e\u6574\u4e2a\u670d\u52a1\u5668\u96c6\u7fa4\u5904\u4e8e\u8d85\u8f7d\u72b6\u6001\uff0c\u8fd9\u65f6\u9700\u8981\u52a0\u5165\u65b0\u7684\u670d\u52a1\u5668\u7ed3\u70b9 \u5230\u96c6\u7fa4\u4e2d\u6765\u5904\u7406\u90e8\u5206\u8d1f\u8f7d\uff1b\u53cd\u4e4b\uff0c\u82e5\u6240\u6709\u670d\u52a1\u5668\u7684\u6743\u503c\u90fd\u63a5\u8fd1\u4e8eSCALE*DEFAULT_WEIGHT\uff0c\u5219\u8bf4\u660e\u5f53\u524d\u7cfb\u7edf\u7684\u8d1f\u8f7d\u90fd\u6bd4\u8f83\u8f7b\u3002<br \/>\n<span class=\\\"atitle3\\\">3.5. \u4e00\u4e2a\u5b9e\u73b0\u4f8b\u5b50<\/span><br \/>\n\u6211\u4eec\u5728RedHat\u96c6\u7fa4\u7ba1\u7406\u5de5\u5177Piranha[6]\u4e2d\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\u3002\u5728\u7efc\u5408\u8d1f\u8f7d\u4e0a\uff0c\u5b83\u53ea\u8003\u8651\u670d\u52a1\u5668\u7684CPU\u8d1f\u8f7d\uff08Load Average\uff09\uff0c\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u8fdb\u884c\u6743\u503c\u8c03\u6574\uff1a<br \/>\n<center><img src=\\\"http:\/\/www.linuxvirtualserver.org\/zh\/lvs4\/weight-formula2.gif\\\" alt=\\\"\\\" \/><\/center>\u670d\u52a1\u5668\u6743\u503c\u8c03\u6574\u533a\u95f4\u4e3a[DEFAULT_WEIGHTi, 10*DEFAULT_WEIGHTi]\uff0cA\u4e3aDEFAULT_WEIGHTi \/2\uff0c\u800c\u6743\u503c\u8c03\u6574\u7684\u9600\u503c\u4e3aDEFAULT_WEIGHTi \/4\u30021\u662f\u6240\u60f3\u8981\u8fbe\u5230\u7684\u7cfb\u7edf\u5229\u7528\u7387\u3002Piranha\u6bcf\u969420\u79d2\u67e5\u8be2\u5404\u53f0\u670d\u52a1\u5668\u7684CPU\u8d1f\u8f7d\uff0c\u8fdb\u884c\u6743\u503c\u8ba1\u7b97\u548c\u8c03\u6574\u3002<br \/>\n<a name=\\\"4\\\"><\/a><span class=\\\"atitle2\\\">4. \u5c0f\u7ed3<\/span><br \/>\n\u672c\u6587\u4e3b\u8981\u8bb2\u8ff0\u4e86IP\u865a\u62df\u670d\u52a1\u5668\u5728\u5185\u6838\u4e2d\u5b9e\u73b0\u7684\u516b\u79cd\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\uff1a<\/p>\n<ul>\n<li>\u8f6e\u53eb\u8c03\u5ea6\uff08Round-Robin Scheduling\uff09<\/li>\n<li>\u52a0\u6743\u8f6e\u53eb\u8c03\u5ea6\uff08Weighted Round-Robin Scheduling\uff09<\/li>\n<li>\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\uff08Least-Connection Scheduling\uff09<\/li>\n<li>\u52a0\u6743\u6700\u5c0f\u8fde\u63a5\u8c03\u5ea6\uff08Weighted Least-Connection Scheduling\uff09<\/li>\n<li>\u57fa\u4e8e\u5c40\u90e8\u6027\u7684\u6700\u5c11\u94fe\u63a5\uff08Locality-Based Least Connections Scheduling\uff09<\/li>\n<li>\u5e26\u590d\u5236\u7684\u57fa\u4e8e\u5c40\u90e8\u6027\u6700\u5c11\u94fe\u63a5\uff08Locality-Based Least Connections with Replication Scheduling\uff09<\/li>\n<li>\u76ee\u6807\u5730\u5740\u6563\u5217\u8c03\u5ea6\uff08Destination Hashing Scheduling\uff09<\/li>\n<li>\u6e90\u5730\u5740\u6563\u5217\u8c03\u5ea6\uff08Source Hashing Scheduling\uff09<\/li>\n<\/ul>\n<p>\u56e0\u4e3a\u8bf7\u6c42\u7684\u670d\u52a1\u65f6\u95f4\u5dee\u5f02\u8f83\u5927\uff0c\u5185\u6838\u4e2d\u7684\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\u5bb9\u6613\u4f7f\u5f97\u670d\u52a1\u5668\u8fd0\u884c\u51fa\u73b0\u503e\u659c\u3002\u4e3a\u6b64\uff0c\u7ed9\u51fa\u4e86\u4e00\u4e2a\u52a8\u6001\u53cd\u9988\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\uff0c\u7ed3\u5408\u5185\u6838\u4e2d\u7684\u52a0\u6743\u8fde\u63a5\u8c03\u5ea6 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class=\"\" href=\"http:\/\/www.weijing.co\/?p=1199\"> <span class=\"screen-reader-text\">LVS\u96c6\u7fa4\u7684\u8d1f\u8f7d\u8c03\u5ea6<\/span> \u67e5\u770b\u5168\u6587 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