{"id":1414,"date":"2022-03-29T12:34:00","date_gmt":"2022-03-29T12:34:00","guid":{"rendered":"http:\/\/124.223.68.123\/?p=1414"},"modified":"2024-06-19T12:35:57","modified_gmt":"2024-06-19T12:35:57","slug":"ndpnew-datacenter-protocol%e6%96%b0%e6%95%b0%e6%8d%ae%e4%b8%ad%e5%bf%83%e4%bc%a0%e8%be%93%e5%8d%8f%e8%ae%ae%e8%a7%a3%e8%af%bb-%e4%b8%8b","status":"publish","type":"post","link":"https:\/\/www.zenosic.com\/en\/ndpnew-datacenter-protocol%e6%96%b0%e6%95%b0%e6%8d%ae%e4%b8%ad%e5%bf%83%e4%bc%a0%e8%be%93%e5%8d%8f%e8%ae%ae%e8%a7%a3%e8%af%bb-%e4%b8%8b\/","title":{"rendered":"NDP(New Datacenter Protocol)\u65b0\u6570\u636e\u4e2d\u5fc3\u4f20\u8f93\u534f\u8bae\u89e3\u8bfb-\u4e0b"},"content":{"rendered":"

\u524d\u8a00<\/strong><\/p>\n\n\n\n

\u7bc6\u82af\u667a\u80fd\u7f51\u7edc\u4ea4\u6362\u673a\u82af\u7247\uff0c\u4e0d\u4ec5\u652f\u6301\u4f20\u7edf\u7684\u5404\u79cd\u4f20\u8f93\u534f\u8bae\u529f\u80fd\u5916\uff0c\u8fd8\u5c06\u652f\u6301\u9488\u5bf9DPU\u548cAI\u52a0\u901f\u82af\u7247\u65b0\u4e00\u4ee3\u4e91\u6570\u636e\u4e2d\u5fc3\u9700\u6c42\u7684\u65b0\u6570\u636e\u4e2d\u5fc3\u4f20\u8f93\u534f\u8bae(NDP-New Datacenter Protocol)\u3002NDP\u4e0d\u4f46\u80fd\u591f\u5b8c\u5168\u53bb\u9664\u4f20\u7edf\u534f\u8bae\u7684\u5386\u53f2\u5305\u88b1\uff08\u5982TCP\u7684\u6162\u542f\u52a8\uff0c\u4f1a\u8bdd\u7684\u5efa\u7acb\u53ca\u62c6\u9664\uff09\uff0c\u8fd8\u80fd\u591f\u5728\u7f51\u7edc\u62e5\u585e\u7684\u60c5\u5f62\u4e0b\u63d0\u4f9b\u9ad8\u6548\u7684\u544a\u8b66\u53ca\u7f13\u89e3\u673a\u5236\uff0c\u8fdb\u800c\u6781\u5927\u5730\u964d\u4f4e\u6574\u4f53\u4ea4\u4e92\u65f6\u5ef6\u8fdb\u800c\u63d0\u9ad8\u6574\u4f53\u5e94\u7528\u7684\u6709\u6548\u6027\u3002<\/p>\n\n\n\n

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\"3dad873435667cd951916ca63ccc2a7e\"<\/figure>\n\n\n\n

<\u7eed\u524d\u6587><\/strong><\/p>\n\n\n\n

NDP\u4ea4\u6362\u673a\u670d\u52a1\u6a21\u578b<\/strong><\/p>\n\n\n\n

\u524d\u8ff0\u6709\u63d0\u5230\u8fc7CP(Cut Payload)\u6280\u672f\uff0c\u901a\u8fc7\u628a\u6570\u636e\u4e22\u6389\uff0c\u5355\u7eaf\u9001\u5305\u5934\u7ed9\u5bf9\u65b9\u3002\u5176\u4e0d\u4e22\u6389\u62a5\u6587\u7684\u539f\u56e0\u662f\u5e0c\u671b\u80fd\u591f\u901a\u77e5\u63a5\u6536\u7aef\u5173\u4e8e\u62a5\u6587\u7684\u4fe1\u606f\uff0c\u8ba9\u63a5\u6536\u7aef\u53ef\u4ee5\u8981\u6c42\u8f6c\u53d1\u7aef\u91cd\u4f20\u3002\u8fd9\u6574\u4f53\u6240\u6d88\u8017\u7684\u65f6\u95f4\u4f1a\u6bd4\u63a5\u6536\u7aef\u4f9d\u8d56\u91cd\u4f20Timeout\u8fd8\u8981\u77ed\u3002\u7136\u800c\u3002\u8bba\u6587\u8fd8\u53d1\u73b0\uff0c\u82e5\u91c7\u7528\u6700\u539f\u751f\u7684CP\u5904\u7406\u5176\u5b9e\u4f1a\u5f15\u53d1\u4e0b\u5217\u95ee\u9898\uff0c\u56e0\u6b64\u8981\u5c06\u5176\u6539\u826f\u4ee5\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u3002\u4ee5\u4e0b\u56fe\u6240\u793a\uff0c\u57289KB jumbo\u5e27\u7684\u60c5\u51b5\u4e0b\uff0c\u53bb\u63a2\u8ba8\u5e94\u7528\u7a0b\u5e8f\u4e4b\u95f4\u7684goodput\uff0cgoodput\u4e0ethroughput\u7684\u5dee\u5f02\u662f\uff1agoodput\u4ee3\u8868\u7684\u662f\u5e94\u7528\u7a0b\u5e8f\u771f\u6b63\u63a5\u6536\u5230\u7684\u62a5\u6587\u91cf\uff0c\u4e0d\u5305\u542b\u534f\u8bae\u5305\u5934\u4ee5\u53ca\u91cd\u4f20\u62a5\u6587\u6240\u9020\u6210\u7684\u6d41\u91cf\u3002<\/p>\n\n\n\n

\"c90b05fd18ca13106a2b504870e43346\"<\/figure>\n\n\n\n

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1.NDP\u4ea4\u6362\u673a\u7ef4\u62a4\u4e24\u4e2a\u961f\u5217\u7f13\u51b2\u533a\uff0c\u4f4e\u4f18\u5148\u7684\u7528\u4e8e\u6570\u636e\u4f20\u8f93\uff0c\u9ad8\u4f18\u5148\u7684\u7528\u4e8e\u88ab\u622a\u65ad\u62a5\u6587\u7684\u4f20\u8f93\uff0cACKS\u4ee5\u53caNACKS\u3002<\/p>\n\n\n\n

2.\u8bba\u6587\u8ba4\u4e3a\u8fd9\u4e2a\u8bbe\u8ba1\u542c\u8d77\u6765\u6709\u70b9\u5947\u7279\uff0c\u770b\u8d77\u6765\u597d\u50cf\u53cd\u800c\u4f1a\u8ba9\u6570\u636e\u62a5\u6587\u66f4\u665a\u9001\u51fa\u53bb\uff0c\u4f46\u662f\u7ecf\u8fc7\u5b9e\u9a8c\u8bc1\u660e\uff0c\u9ad8\u4f18\u5148\u7684\u62a5\u6587\u5230\u8fbe\u63a5\u6536\u7aef\u5e76\u4e14\u901a\u77e5\u9001\u7aef\u8981\u91cd\u4f20\u62a5\u6587\u65f6\uff0c\u901a\u5e38\u4ea4\u6362\u673a\u4f4e\u4f18\u5148\u7f13\u5b58\u7684\u62a5\u6587\u90fd\u8fd8\u6ca1\u6709\u5168\u90e8\u5904\u7406\u5b8c\u6bd5\u3002<\/p>\n\n\n\n

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\u8def\u7531<\/strong><\/p>\n\n\n\n

\u524d\u8ff0\u5df2\u7ecf\u63d0\u5230\uff0cNDP\u60f3\u8981\u5b9e\u73b0per-packet ECMP\u800c\u975eper-flow ECMP\uff0c\u4e8e\u662f\u8bba\u6587\u63d0\u51fa\u4e86\u4e24\u5927\u7c7b\u65b9\u6cd5\uff1a<\/p>\n\n\n\n

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\u8fd9\u6837\u7684\u505a\u6cd5\u6709\u4e24\u4e2a\u4f18\u70b9\uff1a
1.\u901a\u8fc7\u5206\u6563\u62a5\u6587\u5230\u6240\u6709\u8def\u5f84\u53bb\u8f6c\u53d1\uff0c\u80fd\u591f\u63d0\u5347\u7f51\u7edc\u6574\u4f53\u7684\u4f7f\u7528\u7387\uff0c\u5e76\u4e14\u51cf\u5c11\u67d0\u6761\u7f51\u7edc\u6210\u4e3a\u74f6\u9888\u7684\u53ef\u80fd\u6027\u3002
2.\u6bcf\u6b21\u6311\u9009\u65f6\u90fd\u901a\u8fc7\u7c7b\u4f3c\u968f\u673a\u7684\u65b9\u5f0f\uff0c\u53ef\u907f\u514d\u591a\u4e2a\u5e94\u7528\u7a0b\u5e8f\u4f1a\u4f7f\u7528\u76f8\u540c\u7684\u8d70\u6cd5\u5bfc\u81f4\u7f51\u7edc\u51fa\u73b0\u592a\u89c4\u5f8b\u7684\u8d70\u6cd5\uff0c\u8fdb\u800c\u5bfc\u81f4\u4f7f\u7528\u7387\u4e0d\u4f73\u6216\u662f\u67d0\u4e9b\u8def\u5f84\u8fc7\u4e8e\u62e5\u585e\u3002\u5173\u4e8e\u7531\u53d1\u9001\u7aef\u51b3\u5b9a\u5f53\u524d\u62a5\u6587\u8be5\u600e\u8f6c\u53d1\uff0c\u8bba\u6587\u63d0\u51fa\u4e86\u4e09\u79cd\u65b9\u6cd5\uff1a<\/p>\n\n\n\n

1.source-route<\/p>\n\n\n\n

2.label-switch<\/p>\n\n\n\n

\u4e8b\u5148\u89c4\u5212\u597d\u54ea\u4e9blabel\u8d70\u54ea\u4e9b\u8def\u5f84\uff0c\u7136\u540e\u53d1\u9001\u7aef\u62a5\u6587\u4e0alabel<\/p>\n\n\n\n

3.destination addresses<\/p>\n\n\n\n

\u6839\u636e\u76ee\u7684\u7aef\u7684\u4f4d\u7f6e\u6765\u9009\u62e9\uff0c\u5047\u5982\u76ee\u7684\u7aef\u6709\u591a\u4e2aIP\u5730\u5740\uff0c\u5219\u6bcf\u4e2a\u5730\u5740\u90fd\u53ef\u80fd\u6709\u4e0d\u540c\u7684\u8d70\u6cd5\u3002<\/p>\n\n\n\n

\u4f20\u8f93\u534f\u8bae<\/strong><\/p>\n\n\n\n

\u63a5\u4e0b\u6765\u8be6\u7ec6\u4ecb\u7ecdNDP\u4f20\u8f93\u534f\u8bae\u7684\u8bbe\u8ba1\u3002<\/p>\n\n\n\n

NDP\u5728\u8bbe\u8ba1\u4f20\u8f93\u534f\u8bae\u65f6\u662f\u57fa\u4e8e\u63a5\u6536\u7aef\u9a71\u52a8\u7684\u7406\u5ff5\u53bb\u8bbe\u8ba1\u7684\u3002\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e2a\u8bbe\u8ba1\u80fd\u591f\u8ddf\u4e4b\u524d\u63d0\u8fc7\u7684\u5404\u5f0f\u5404\u6837\u6280\u672f\u7ed3\u5408\uff0c\u5982multipath forwarding\u3001 packettrimming \u4ee5\u53ca short switch queues\u7b49\u3002\u901a\u8fc7\u4e0e\u8fd9\u4e9b\u6280\u672f\u7ed3\u5408\uff0cNDP\u63d0\u4f9b\u4f4e\u5ef6\u8fdf\u548c\u9ad8\u4ea7\u51fa\u7684\u6548\u80fd\u3002<\/p>\n\n\n\n

TCP\u65e9\u671f\u8bbe\u8ba1\u662f\u7ed9\u4e92\u8054\u7f51\u7528\u7684\uff0c\u6240\u4ee5\u8bbe\u8ba1\u7406\u5ff5\u662f\u60b2\u89c2\u7684\uff0c\u56e0\u4e3a\u4e0d\u77e5\u9053\u6574\u4e2a\u7f51\u7edc\u4e0a\u6bcf\u4e2a\u8282\u70b9\u7684\u72b6\u51b5\uff0c\u5c3d\u53ef\u80fd\u7684\u5c0f\u5fc3\u53bb\u4f7f\u7528\u3002\u5982slow start\u3001\u4e09\u6b21\u63e1\u624b\u7b49\u539f\u5219\u3002\u6b64\u5916\uff0c\u5bf9\u4e8eTCP\u6765\u8bf4\uff0c\u5f53\u540c\u65f6\u53d1\u751f\u7f51\u7edc\u62e5\u585e\u4e22\u5f03\u62a5\u6587\uff0c\u6216\u591a\u91cd\u8def\u5f84\u8def\u7531\u6240\u5bfc\u81f4\u62a5\u6587\u7684\u987a\u5e8f\u4e0d\u4e00\u81f4\uff0c\u8fd9\u4e9b\u60c5\u51b5\u4f1a\u8ba9TCP\u65e0\u6cd5\u5206\u8fa8\u5230\u5e95\u53d1\u751f\u4ec0\u4e48\u4e8b\u60c5\uff0c\u4e8e\u662f\u6700\u540e\u53ea\u597d\u8981\u6c42\u53d1\u9001\u7aef\u91cd\u4f20\uff0c\u8fd9\u884c\u4e3a\u65e0\u5f62\u95f4\u5c31\u964d\u4f4e\u4e86\u6574\u4f53\u7684\u4f20\u8f93\u901f\u5ea6\u3002<\/p>\n\n\n\n

\u7136\u800c\u5bf9NDP\u6765\u8bf4\u5c31\u4e0d\u4e00\u6837\uff0c\u7531\u4e8e\u662f\u5728\u6570\u636e\u4e2d\u5fc3\u5185\uff0c\u80fd\u591f\u4e8b\u5148\u77e5\u9053\u6574\u4e2a\u7f51\u7edc\u8282\u70b9\u7684\u5404\u60c5\u51b5\uff0c\u56e0\u6b64NDP\u91c7\u53d6\u7684\u662f\u4e50\u89c2\u7684\u8bbe\u8ba1\u7406\u5ff5\uff1a<\/p>\n\n\n\n

1.\u6536\u5230\u7b2c\u4e00\u4e2aRTT\u5c31\u8f6c\u53d1\u62a5\u6587\uff0c\u4e0d\u7b49\u4e09\u6b21\u63e1\u624b\u3002<\/p>\n\n\n\n

2.\u4e00\u5f00\u59cb\u5c31\u6839\u636e\u5f53\u524d\u7ebf\u8def\u7684\u6700\u5927\u627f\u8f7d\u91cf\u53bb\u8bbe\u5b9a\u4f20\u8f93\u901f\u5ea6\uff0c\u5047\u8bbe\u90fd\u6ca1\u6709\u5176\u4ed6\u6d41\u91cf\u4f7f\u7528\u3002<\/p>\n\n\n\n

3.\u4e0d\u4f9d\u8d56\u987a\u5e8f\u7684\u534f\u8bae\u5185\u5bb9<\/p>\n\n\n\n

NDP\u91c7\u7528\u4e86\u622a\u65ad\u62a5\u6587\u7684\u65b9\u5f0f\uff0c\u901a\u8fc7\u5305\u5934\u7684\u5185\u5bb9\u544a\u8bc9\u63a5\u6536\u7aef\u5230\u5e95\u54ea\u4e9b\u62a5\u6587\u9700\u8981\u91cd\u4f20\uff0c\u8fd9\u4f7f\u5f97\u63a5\u6536\u7aef\u6709\u66f4\u660e\u786e\u7684\u4fe1\u606f\u77e5\u9053\u7f51\u7edc\u53d1\u751f\u4ec0\u4e48\u60c5\u51b5\uff0c\u56e0\u6b64\u62a5\u6587\u5230\u8fbe\u7684\u5148\u540e\u987a\u5e8f\u5c31\u663e\u5f97\u4e0d\u91cd\u8981\u3002<\/p>\n\n\n\n

\u4e0b\u56fe\u89e3\u91ca\u4e86\u622a\u65ad\u62a5\u6587\u7684\u8fd0\u4f5c\u6a21\u5f0f\uff1a<\/p>\n\n\n\n

\"7f8d3dc8b4da26862f458bfa34352c3a\"<\/figure>\n\n\n\n

\u5047\u8bbe\u4eceSRC\u8981\u8f6c\u53d1\u4e5d\u4e2a\u62a5\u6587\u5230\u8fbeDST\uff0c\u5f53\u62a5\u6587\u5230\u8fbeDST\u4e0a\u5c42\u7684\u4ea4\u6362\u673a\u65f6\uff0c\u56e0\u4e3a\u4ea4\u6362\u673a\u7684\u6570\u636e\u7f13\u5b58(\u4f4e\u4f18\u5148\u961f\u5217)\u53ea\u80fd\u627f\u53d7\u516b\u4e2a\u62a5\u6587\u3002\u6240\u4ee5\u7b2c\u4e5d\u4e2a\u62a5\u6587\u5c31\u88ab\u622a\u65ad\u4e86(\u65f6\u95f4\u70b9\u4e3aT(trim))\u3002\u63a5\u4e0b\u6765\u901a\u8fc7\u4e0d\u540c\u4f18\u5148\u961f\u5217\u7684\u8bbe\u8ba1\uff0c\u88ab\u622a\u65ad\u7684\u62a5\u6587\u53ef\u4ee5\u5728 T(header)\u7684\u65f6\u95f4\u5c31\u9a6c\u4e0a\u5230\u8fbeDST\uff0cDST\u5728\u770b\u5230\u5305\u5934\u540e\u5c31\u9a6c\u4e0a\u77e5\u9053\u7b2c\u4e5d\u4e2a\u62a5\u6587\u9700\u8981\u91cd\u4f20\uff0c\u56e0\u6b64\u9a6c\u4e0a\u9001\u4e2a\u4fe1\u606f\u56de\u5230\u9001\u7aef\u3002\u6b64\u4fe1\u606f\u5230\u8fbe\u53d1\u9001\u7aef\u7684\u65f6\u95f4\u70b9\u4e3a T(rtx)\uff0c\u540c\u65f6\u4ea4\u6362\u673a\u8fd8\u5728\u5904\u7406\u521a\u624d\u7684\u516b\u4e2a\u62a5\u6587\uff0c\u5927\u6982\u5904\u7406\u5230\u7b2c\u4e8c\u4e2a\u5de6\u53f3\u3002\u5f53\u53d1\u9001\u7aef\u5c06\u7b2c\u4e5d\u4e2a\u62a5\u6587\u9001\u5230\u4ea4\u6362\u673a\u65f6\uff0c\u6b64\u65f6\u4ea4\u6362\u673a\u5904\u7406\u5230\u7b2c\u516d\u4e2a\u5de6\u53f3\uff0c\u56e0\u6b64\u6570\u636e\u7f13\u5b58\u4e0d\u4f46\u6709\u7a7a\u95f4\u53ef\u4ee5\u5bb9\u7eb3\u7b2c\u4e5d\u4e2a\u62a5\u6587\uff0c\u540c\u65f6\u8fd9\u8fc7\u7a0b\u4e2d\u4e5f\u6ca1\u6709\u4efb\u4f55\u5904\u4e8e\u95f2\u7f6e\u7684\u51b5\u72b6\uff0c\u53ef\u4ee5\u8bf4\u662f\u5c06\u7f13\u5b58\u7684\u4f7f\u7528\u7387\u5c3d\u53ef\u80fd\u7684\u63d0\u5347\u3002<\/p>\n\n\n\n

\u81f3\u6b64\uff0c\u53ef\u4ee5\u77e5\u9053\u622a\u65ad\u62a5\u6587\u80fd\u591f\u544a\u8bc9\u63a5\u6536\u7aef\u54ea\u4e9b\u62a5\u6587\u9700\u8981\u91cd\u4f20\u3002\u8bba\u6587\u8ba4\u4e3a\u901a\u8fc7\u4e0a\u8ff0\u7684\u7279\u6027\u4e0eZero RTT\u7684\u7ed3\u5408\uff0c\u8ba4\u4e3a\u8ba9\u53d1\u9001\u7aef\u53bb\u51b3\u5b9a\u5f53\u6536\u5230\u6570\u636e(Zero RTT)\u540e\u53d1\u9001\u7aef\u8981\u8f6c\u53d1\u591a\u5c11\u62a5\u6587\u662f\u6700\u4f73\u7684\u9009\u62e9\u3002<\/p>\n\n\n\n

\u5176\u8bbe\u8ba1\u7406\u5ff5\u53ca\u539f\u5219\u4e3a\uff1a<\/p>\n\n\n\n

\u5f53\u53d1\u9001\u7aef\u4e00\u5f00\u59cb\u7528\u5168\u901f\u53bb\u8f6c\u53d1\u62a5\u6587\u540e\uff0c\u63a5\u4e0b\u6765\u5c31\u4f1a\u505c\u6b62\u8f6c\u53d1\u62a5\u6587<\/p>\n\n\n\n

\u7b49\u5f85\u63a5\u6536\u7aef\u8f6c\u53d1\u8bf7\u6c42\u8981\u6c42\u53d1\u9001\u7aef\u7ee7\u7eed\u8f6c\u53d1\u62a5\u6587<\/p>\n\n\n\n

\u63a5\u6536\u7aef\u53ef\u4ee5\u6839\u636e\u5f53\u524d\u672c\u8eab\u6536\u9001\u62a5\u6587\u7684\u901f\u7387(\u5982\u5bf9\u5916\u94fe\u63a5\u4e0a\u6709\u591a\u6761\u8fde\u63a5\u5bfc\u81f4\u6bcf\u6761\u8fde\u63a5\u90fd\u6ca1\u6709\u529e\u6cd5\u7528\u5230\u6700\u9ad8\u901f\u5ea6)\uff0c\u56e0\u6b64\u4f1a\u7531\u63a5\u6536\u7aef\u53bb\u51b3\u5b9a\u53d1\u9001\u7aef\u5f53\u524d\u8f6c\u53d1\u901f\u5ea6\u591a\u5feb<\/p>\n\n\n\n

\u4e0d\u8bba\u662f\u91cd\u4f20\u7684\u62a5\u6587\uff0c\u6216\u662f\u5168\u65b0\u7684\u6570\u636e\u62a5\u6587\uff0c\u63a5\u6536\u7aef\u90fd\u53ef\u4ee5\u8981\u6c42\u53d1\u9001\u7aef\u8f6c\u53d1<\/p>\n\n\n\n

\u63a5\u6536\u7aef\u91c7\u7528Pull\u7684\u6982\u5ff5\u6765\u8fbe\u5230\u63a7\u5236\u53d1\u9001\u7aef\u7684\u4f20\u8f93\u901f\u5ea6\uff0c\u63a5\u6536\u7aef\u4f1a\u7ef4\u62a4Pull\u961f\u5217\uff0c\u4f9b\u6240\u6709\u8fde\u63a5\u4e00\u8d77\u4f7f\u7528<\/p>\n\n\n\n

Pull\u961f\u5217\u5185\u653e\u7f6e\u7684\u662fPull\u62a5\u6587\uff0c\u8be5\u62a5\u6587\u8981\u6807\u793a\u5c5e\u4e8e\u54ea\u4e2a\u8fde\u63a5\uff0c\u4ee5\u53ca\u8ba1\u6570\u5668\uff0c\u800c\u8be5\u8ba1\u6570\u5668\u5219\u662fper-sender\u7684\uff0c\u7528\u6765\u8bb0\u5f55\u5f53\u524d\u8f6c\u53d1\u8fc7\u591a\u5c11\u4e2aPull\u62a5\u6587<\/p>\n\n\n\n

Pull\u961f\u5217\u9ed8\u8ba4\u4f1a\u516c\u5e73\u5730\u53bb\u5904\u7406\u6bcf\u4e2a\u8fde\u63a5\u6240\u5bf9\u5e94\u7684Pull\u62a5\u6587\uff0c\u4e0d\u8fc7\u53ef\u4ee5\u6839\u636e\u8fde\u63a5\u4f18\u5148\u5ea6\u8c03\u6574\u5176\u8f6c\u53d1\u7684Pull\u62a5\u6587\u6570\u91cf\uff0c\u4ee5\u63d0\u9ad8\u5bf9\u5e94\u9001\u7aef\u7684\u4f20\u8f93\u901f\u5ea6<\/p>\n\n\n\n

\u6bcf\u4e2a\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u8fde\u63a5\u5f00\u59cb\u65f6\uff0c\u53d1\u9001\u7aef\u4e00\u5f00\u59cb\u5c31\u7528\u5168\u901f\u5c06\u62a5\u6587\u9001\u5f80\u63a5\u6536\u7aef\uff0c\u8fd9\u4e9b\u62a5\u6587\u90fd\u4f1a\u5305\u542b\u7c7b\u4f3cTCP\u7684\u5e8f\u53f7<\/p>\n\n\n\n

\u82e5\u63a5\u6536\u7aef\u6536\u5230\u7684\u662f\u88ab\u622a\u65ad\u7684\u62a5\u6587\uff0c\u4f1a\u7acb\u523b\u8f6c\u53d1NACK\u7ed9\u53d1\u9001\u7aef\uff0c\u8981\u6c42\u5176\u5c06\u51c6\u5907\u91cd\u4f20\u62a5\u6587(\u8fd8\u4e0d\u9700\u8981\u91cd\u4f20)<\/p>\n\n\n\n

\u82e5\u63a5\u6536\u7aef\u6536\u5230\u7684\u662f\u6570\u636e\u62a5\u6587\uff0c\u4f1a\u7acb\u523b\u8f6c\u53d1ACK\u7ed9\u53d1\u9001\u7aef\uff0c\u901a\u77e5\u5176\u8be5\u62a5\u6587\u5df2\u63a5\u6536\u5230(\u6e05\u9664\u65e7\u4fe1\u606f\uff0c\u51c6\u5907\u65b0\u62a5\u6587\uff0c\u6b64\u65f6\u4e5f\u8fd8\u4e0d\u4f1a\u8f6c\u53d1)<\/p>\n\n\n\n

\u5f53\u63a5\u6536\u7aef\u6536\u5230\u62a5\u6587(\u6570\u636e\u6216\u662f\u622a\u65ad\u62a5\u6587)\uff0c\u90fd\u4f1a\u9a6c\u4e0a\u52a0\u5165\u4e00\u4e2aPull\u62a5\u6587\u5230\u5176Pull\u961f\u5217\u4e2d<\/p>\n\n\n\n

\u5f53\u53d1\u9001\u7aef\u6536\u5230\u7531\u63a5\u6536\u7aef\u6240\u8f6c\u53d1\u7684Pull\u62a5\u6587\u65f6\uff0c\u4f1a\u6839\u636ePull\u62a5\u6587\u5185\u7684\u8ba1\u6570\u5668\u6765\u51b3\u5b9a\u5f53\u4e0b\u8981\u8f6c\u53d1\u591a\u5c11\u62a5\u6587(\u53ef\u4ee5\u662f\u91cd\u4f20\u62a5\u6587\uff0c\u4e5f\u53ef\u4ee5\u662f\u65b0\u62a5\u6587)<\/p>\n\n\n\n

\u5f53\u53d1\u9001\u7aef\u5c06\u6240\u6709\u62a5\u6587\u90fd\u8f6c\u53d1\u5b8c\u6bd5\u540e\uff0c\u5c31\u4f1a\u5c06\u6700\u540e\u4e00\u4e2a\u62a5\u6587\u6253\u4e0a\u6807\u5fd7\uff0c\u5f53\u63a5\u6536\u7aef\u770b\u5230\u6b64\u6807\u5fd7\u65f6\u5c31\u77e5\u9053\u5bf9\u5e94\u7684\u53d1\u9001\u7aef\u5df2\u7ecf\u6ca1\u6709\u62a5\u6587\u8981\u9001\u4e86\uff0c\u5c31\u5c06\u5176\u5bf9\u5e94\u7684Pull\u5305\u79fb\u9664\uff0c\u907f\u514d\u4e0b\u6b21\u4ea7\u751f\u4e0d\u5fc5\u8981\u7684\u8bf7\u6c42\u4f20\u8f93<\/p>\n\n\n\n

\u82e5\u53d1\u9001\u7aef\u4e4b\u540e\u53c8\u6709\u6570\u636e\u60f3\u8981\u4f20\u8f93\uff0c\u5219\u5fc5\u987b\u4e3b\u52a8\u4f20\u8f93\u7ed9\u63a5\u6536\u7aef\uff0c\u800c\u4e0d\u4f1a\u901a\u8fc7\u63a5\u6536\u7aef\u7684Pull\u62a5\u6587\u6765\u53d6\u5f97<\/p>\n\n\n\n

\u6839\u636e\u8bba\u6587\u5b9e\u9a8c\u6570\u636e\uff0c\u5176\u76f8\u5173\u8bbe\u5b9a\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u4ea4\u6362\u673a\u7684\u6570\u636e\u7f13\u5b58\u53ea\u6709\u516b\u4e2a\u62a5\u6587<\/p>\n\n\n\n

MTU\u8bbe\u5b9a\u4e3a9K (jumbo\u5e27)\uff0c<\/p>\n\n\n\n

\u4ea4\u6362\u673a\u6027\u80fd\u4e3a10Gb\/s<\/p>\n\n\n\n

\u73af\u5883\u4e3aFatTree<\/p>\n\n\n\n

\u5728\u6b64\u73af\u5883\u4e0b\uff0c\u6bcf\u4e2a\u62a5\u6587\u5b8c\u6574\u5904\u7406\u7684\u65f6\u95f4\u4e3a7.2\u00b5s\uff0c\u82e5\u8003\u8651\u5230\u4f18\u5148\u961f\u5217\u7684\u4f7f\u7528\uff0c\u6700\u5dee\u60c5\u51b5\u4e0b\u7684\u5904\u7406\u65f6\u95f4\u662f400\u00b5s\uff0c\u6b64\u6570\u636e\u4e00\u822c\u6765\u8bf4\u5176\u5b9e\u662f\u975e\u5e38\u5c0f\u7684\u3002\u56e0\u6b64\u5728NDP\u7684\u73af\u5883\u4e2d\uff0cRTO (Retransmission timeout) \u53ef\u4ee5\u8bbe\u8ba1\u5f97\u66f4\u5c0f\u3002\u90a3NDP\u5982\u4f55\u5728Incast\u7684\u72b6\u51b5\u4e0b\u53d6\u5f97\u597d\u7684\u8868\u73b0?\u5047\u8bbe\u4e00\u5f00\u59cb\u6709\u5f88\u591a\u4e2a\u53d1\u9001\u7aef\uff0c\u6bcf\u4e2a\u90fd\u7528\u5168\u901f\u4f20\u8f93\u3002\u53ef\u4ee5\u60f3\u8c61\u5f97\u5230\u7684\u662f\u4f1a\u6709\u5f88\u591a\u62a5\u6587\u90fd\u88ab\u622a\u65ad\uff0c\u63a5\u6536\u65b9\u6bcf\u4e2a\u5bf9\u5e94\u7684\u63a5\u6536\u7aef\u90fd\u53ef\u4ee5\u91c7\u7528Pull\u7684\u6982\u5ff5\u63a7\u5236\u5bf9\u5e94\u53d1\u9001\u7aef\u7684\u4f20\u8f93\u901f\u5ea6\uff0c\u5c31\u53ef\u4ee5\u8ba9\u6bcf\u4e2a\u53d1\u9001\u7aef\u7684\u4f20\u8f93\u901f\u5ea6\u603b\u548c\u80fd\u591f\u7b26\u5408\u4ea4\u6362\u673a\u7684\u5904\u7406\u901f\u5ea6\uff0c\u80fd\u591f\u8ba9\u88ab\u622a\u65ad\u7684\u62a5\u6587\u6570\u91cf\u964d\u5230\u6700\u5c0f\uff0c\u751a\u81f3\u6ca1\u6709\u3002<\/p>\n\n\n\n

Coping with Reordering<\/p>\n\n\n\n

\u6839\u636ePer-packet\u591a\u91cd\u8def\u5f84\u8def\u7531\uff0c\u5bf9\u4e8e\u53d1\u9001\u7aef\/\u63a5\u6536\u7aef\u6765\u8bf4\uff0c\u6570\u636e\u62a5\u6587\uff0cPull\u62a5\u6587\uff0cACK\u4ee5\u53caNACK\u5728\u6536\u5230\u7684\u65f6\uff0c\u662f\u975e\u5e38\u6709\u53ef\u80fd\u662f\u4e71\u5e8f\u7684\u3002\u867d\u7136NDP\u4e00\u5f00\u59cb\u7684\u8bbe\u8ba1\u662f\u4e0d\u7528\u62c5\u5fc3\u8fd9\u4e2a\u60c5\u51b5\u7684\u3002<\/p>\n\n\n\n

The First RTT<\/strong><\/p>\n\n\n\n

NDP\u4e3a\u4e86\u8fbe\u5230\u80fd\u591f\u5728\u7b2c\u4e00\u4e2a\u62a5\u6587\u5c31\u76f4\u63a5\u8f6c\u53d1\u6570\u636e\u800c\u4e0d\u91c7\u7528TCP\u7684\u4e09\u6b21\u63e1\u624b\u540e\u8f6c\u53d1\u6570\u636e\uff0c\u5fc5\u987b\u8981\u5904\u7406\u4e09\u4e2a\u95ee\u9898\uff1a<\/p>\n\n\n\n

\u907f\u514d\u9047\u5230\u5927\u91cf\u76f8\u540cSource IP\u7684\u5783\u573e\u62a5\u6587\u5f71\u54cd<\/p>\n\n\n\n

(\u56e0\u4e3aTCP\u6709\u8fde\u63a5\u8ba4\u8bc1\uff0c\u6ca1\u6709\u8fde\u63a5\u7684TCP\u62a5\u6587\u4e0d\u4f1a\u88ab\u5904\u7406\uff0c\u907f\u514d\u88ab\u5927\u91cf\u5783\u573e\u5f71\u54cd)<\/p>\n\n\n\n

2.\u907f\u514d\u540c\u6837\u4e00\u6761\u8fde\u63a5\u591a\u6b21\u5efa\u7acb\u8fde\u63a5<\/p>\n\n\n\n

3.\u5904\u7406\u5728\u7b2c\u4e00\u4e2aRTT\u4e4b\u95f4\u7ecf\u7531\u591a\u91cd\u8def\u5f84\u8def\u7531\u9020\u6210\u4e71\u5e8f\u7684\u6570\u636e\u62a5\u6587<\/p>\n\n\n\n

\u76ee\u524d\u5df2\u77e5\u91c7\u7528First RTT\u5904\u7406\u65b9\u6cd5\uff0c\u5982 T\/TCP\u4ee5\u53caTFO(TCP Fast Open)\u90fd\u6709\u4e00\u4e9b\u76f8\u5173\u673a\u5236\uff0c\u5982\u91c7\u7528Token\u6216Connection ID\u6765\u5904\u7406\u4e0a\u8ff0\u95ee\u9898\uff0c\u4f46\u662f\u6ca1\u6709\u4e00\u79cd\u65b9\u6cd5\u80fd\u591f\u540c\u65f6\u5904\u7406\u4e09\u4e2a\u95ee\u9898\u3002\u8fd9\u4e2a\u95ee\u9898NDP\u4e0d\u60f3\u5904\u7406\uff0c\u8ba4\u4e3a\u53ef\u901a\u8fc7Hypervisor\/NIC\u4e4b\u7c7b\u7684\u65b9\u5f0f\u9884\u9632\u3002<\/p>\n\n\n\n

\u5728\u53d1\u9001\u7aef\/\u63a5\u6536\u7aef\u4e24\u8fb9\u90fd\u8bbe\u8ba1\u4e86time-wait\u7684\u72b6\u6001\u3002\u7531\u4e8eper-packet ECMP\u7684\u5173\u7cfb\uff0c\u7b2c\u4e00\u4e2a\u5230\u8fbe\u63a5\u6536\u7aef\u7684\u62a5\u6587\u5f80\u5f80\u4e0d\u662f\u7b2c\u4e00\u4e2a\u9001\u51fa\u7684\u62a5\u6587\uff0c\u4e3a\u4e86\u5904\u7406\u8fd9\u4e2a\u95ee\u9898\uff0c\u53d1\u9001\u7aef\u7b2c\u4e00\u6b21\u9001\u51fa\u7684\u62a5\u6587\u90fd\u4f1a\u5e26\u6709\u4e00\u4e2aSYN\u7684\u6807\u5fd7\u4ee5\u53ca\u8be5\u62a5\u6587\u662f\u7b2c\u4e00\u6b21\u9001\u51fa\u62a5\u6587\u4e2d\u7684\u7b2c\u51e0\u4e2a\u3002\u901a\u8fc7\u8fd9\u4e2a\u4fe1\u606f\u5c31\u53ef\u4ee5\u8ba9\u4efb\u4f55\u4e00\u4e2a\u7b2c\u4e00\u6b21\u9001\u51fa\u4e2d\u7684\u4efb\u4e00\u4e2a\u62a5\u6587\u6765\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n\n\n\n

Robustness Optimizations<\/strong><\/p>\n\n\n\n

\u5047\u5982\u7f51\u7edc\u4e00\u5207\u90fd\u6b63\u5e38\u8fd0\u884c\uff0c\u4e0a\u8ff0NDP\u5176\u5b9e\u8fd0\u4f5c\u5f97\u975e\u5e38\u826f\u597d\uff0c\u7136\u800c\u597d\u666f\u4e0d\u5e38\uff0c\u7f51\u7edc\u5e38\u5e38\u4f1a\u51fa\u95ee\u9898\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cNDP\u8981\u600e\u4e48\u5904\u7406\u8fd9\u4e9b\u95ee\u9898\u6765\u7ee7\u7eed\u4fdd\u6301\u5176\u63d0\u4f9b\u7684\u4f4e\u5ef6\u8fdf\u4e0e\u9ad8\u8f93\u51fa\u7684\u7279\u6027\u3002\u5e38\u89c1\u7684\u95ee\u9898\u6709\uff1a<\/p>\n\n\n\n

1. \u4ea4\u6362\u673a\u6545\u969c\u5bfc\u81f4\u62a5\u6587\u4e0d\u901a<\/p>\n\n\n\n

2. link\u51fa\u95ee\u9898\uff0c\u7a81\u7136\u964d\u901f\uff0c\u5982\u4ece10Gbs\u964d\u901f\u62101Gbs<\/p>\n\n\n\n

\u8bba\u6587\u8ba4\u4e3a\u4f20\u7edf\u7684single-path TCP\u5bf9\u4e8e\u8fd9\u4e9b\u95ee\u9898\u90fd\u6ca1\u6709\u5f88\u597d\u7684\u5904\u7406\u65b9\u5f0f\uff0c\u4f1a\u8ba9\u6574\u4f53\u7684\u6548\u80fd\u5927\u5e45\u5ea6\u4e0b\u964d\u3002NDP\u5904\u7406\u7684\u65b9\u5f0f\u5c31\u662f\u91c7\u7528\u5927\u91cf\u7684\u8ba1\u6570\u5668\uff0c\u53bb\u8bb0\u4f4f\u6bcf\u6761\u8fde\u63a5\u4e0a\u9762\u5173\u4e8eACK\u4ee5\u53caNACK\u7684\u6570\u91cf\uff0c\u540c\u65f6\u901a\u8fc7per-packet\u591a\u91cd\u8def\u7531\u7684\u65b9\u5f0f\u6765\u8f6c\u53d1\u62a5\u6587\u3002\u56e0\u6b64\u53d1\u9001\u7aef\u4f1a\u5b9a\u671f\u68c0\u67e5\uff0c\u82e5\u5f53\u4e0b\u6240\u6709\u53ef\u8f6c\u53d1\u8def\u5f84\u4e2d\uff0c\u6709\u67d0\u4e9b\u8def\u7531\u4e0a\u9762\u7684\u8ba1\u6570\u5668\u6570\u503c\u5f02\u5e38\uff0c\u4ee3\u8868\u53ef\u80fd\u51fa\u73b0\u95ee\u9898\uff0c\u4e0d\u8bba\u662f\u964d\u901f\u6216\u662f\u7f51\u7edc\u4e0d\u901a\u3002\u6b64\u65f6\u5c31\u4f1a\u5c06\u6709\u95ee\u9898\u7684\u8def\u7531\u5148\u4ece\u5019\u9009\u6e05\u5355\u4e2d\u6392\u9664\uff0c\u907f\u514d\u62a5\u6587\u8d70\u5230\u6709\u95ee\u9898\u7684\u8def\u7531\u53bb\u3002\u8bba\u6587\u8ba4\u4e3a\u4f20\u7edf\u7684\u4f5c\u6cd5\u5927\u90e8\u5206\u90fd\u4f9d\u8d56\u8def\u7531\u534f\u8bae\u53bb\u4fa6\u6d4b\u95ee\u9898\u5e76\u52a8\u6001\u4fee\u6539\u8def\u7531\u8868\uff0c\u8fd9\u4e9b\u867d\u7136\u6709\u6548\uff0c\u4f46\u8981\u82b1\u8d39\u592a\u591a\u65f6\u95f4\u53bb\u5904\u7406\uff0c\u56e0\u6b64\u6548\u679c\u4e0d\u4f73\u3002<\/p>\n\n\n\n

Return-to-Sender<\/p>\n\n\n\n

\u524d\u8ff0\u63d0\u8fc7\uff0c\u91c7\u7528CP\u673a\u5236\u80fd\u591f\u6709\u6548\u7684\u89e3\u51b3Incast\u7f51\u7edc\u95ee\u9898\uff0c\u7136\u800c\u5f53Incast\u62a5\u6587\u8fc7\u591a\u65f6\uff0c\u4ea4\u6362\u673a\u4e0a\u7684\u4e24\u4e2a\u961f\u5217(\u9ad8\/\u4f4e\u4f18\u5148)\u90fd\u53ef\u80fd\u4f1a\u88ab\u585e\u6ee1\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u62a5\u6587\u5c31\u4f1a\u88ab\u4e22\u5f03\u4e86\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0c\u9ad8\u4f18\u5148\u961f\u5217\u53ef\u4ee5\u5b58\u653e1125*64-byte\u7684\u62a5\u6587\u91cf\uff0c\u800c\u4f4e\u4f18\u5148\u961f\u5217\u53ea\u80fd\u5b58\u653e8*9K-byte\u7684\u62a5\u6587\u91cf\u3002\u5047\u8bbe\u53d1\u9001\u7aef\u8f6c\u53d1\u4e86\u4e00\u4e2a\u62a5\u6587\u8fc7\u53bb\uff0c\u5374\u8fdf\u8fdf\u6ca1\u6709\u7b49\u5230\u54cd\u5e94\uff0c\u5728\u7ecf\u8fc7RTO\u65f6\u95f4\u540e\uff0c\u5c31\u4f1a\u91cd\u4f20\u62a5\u6587\u3002\u6839\u636e\u524d\u8ff0\u7684\u5b9e\u9a8c\uff0c\u6700\u5927RTT\u65f6\u95f4\u662f400\u00b5s\uff0c\u56e0\u6b64\u8bba\u6587\u8ba4\u4e3a\u6700\u5927\u7684RTO\u8bbe\u5b9a\u4e3a1ms\u5373\u53ef\u3002\u7136\u800c\u6839\u636e10Gbs\u7684\u4f20\u8f93\u80fd\u529b\u6765\u770b\uff0c\u8981\u5904\u74061125*64B\u7684\u62a5\u6587\u5927\u6982\u9700\u89818ms\uff0c\u8fd9\u610f\u5473\u8005\u91cd\u4f20\u7684\u62a5\u6587\u662f\u53ef\u4ee5\u5728\u961f\u5217\u88ab\u6d88\u8017\u5b8c\u6bd5\u524d\u9001\u8fbe\u5230\u4ea4\u6362\u673a\uff0c\u53ef\u4ee5\u4fdd\u969c\u4e0d\u4f1a\u6709\u4ea4\u6362\u673a\u5904\u4e8e\u95f2\u7f6e\u7684\u72b6\u6001\u8fdb\u800c\u63d0\u9ad8\u6574\u4f53\u4f7f\u7528\u7387\u3002<\/p>\n\n\n\n

\u4e3a\u4e86\u8ffd\u6c42\u6781\u81f4\uff0c\u8bba\u6587\u8ba4\u4e3a\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5982\u9ad8\u4f18\u5148\u62a5\u6587\u6216\u6570\u636e\u91cf\u6781\u5c0f\u7684\u62a5\u6587\uff0c\u5f53\u6240\u6709\u7684\u961f\u5217\u90fd\u6ee1\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u65f6\u5019\u4ea4\u6362\u673a\u5c31\u4f1a\u91c7\u53d6\u7279\u522b\u505a\u6cd5\uff0c\u5c06\u62a5\u6587\u7684source IP\u4ee5\u53cadestination IP\u53cd\u8f6c\uff0c\u7136\u540e\u5c06\u8be5header\u8fc5\u901f\u9001\u56de\u7ed9\u53d1\u9001\u7aef\uff0c\u544a\u8bc9\u53d1\u9001\u7aef\u8bf4\u6709\u62a5\u6587\u8981\u6389\u4e86\uff0c\u5feb\u91cd\u4f20\u3002\u8fd9\u79cd\u673a\u5236\u53ea\u6709\u5728\u67d0\u4e9b\u7279\u6b8a\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u7f51\u7edc\u5f53\u4e0b\u6709\u4e9b\u95ee\u9898\u4e4b\u7c7b\u7684\uff0c\u60f3\u8981\u52a0\u5feb\u5904\u7406\u901f\u5ea6\uff0c\u907f\u514d\u7b49\u5f85RTO\u6765\u5904\u7406\u3002\u4e0b\u56fe\u662f\u6839\u636e\u4eff\u771f\u73af\u5883\u5f97\u5230\u7684\u6570\u636e\u56fe\uff1a<\/p>\n\n\n\n

\"0d10bc2fbe060a2e4f4b14680ada3742\"<\/figure>\n\n\n\n

Y\u8f74\u662fCDF(cumulative distribution function)\uff0cX\u8f74\u7eaa\u5f55\u7684\u662f\u5f53\u53d1\u9001\u7aef\u9001\u51fa\u7b2c\u4e00\u4e2a\u62a5\u6587\u5230\u8fbe\u5176\u6536\u5230\u7b2c\u4e00\u4e2aACK\u6240\u82b1\u7684\u65f6\u95f4\u3002\u6b64\u6570\u503c\u5305\u542b\u6240\u6709\u7684delay\uff0c\u4e5f\u5305\u542b\u91cd\u4f20\u6240\u5bfc\u81f4\u7684\u82b1\u8d39\u3002<\/p>\n\n\n\n

Permutation\u663e\u793a\u7684\u662f432-node\u4e2d\u6bcf\u4e2anode\u90fd\u4f1a\u5f80\u4e0b\u4e00\u4e2anode\u6765\u8fdb\u884c\u8fde\u63a5\uff0c\u6545\u4f1a\u6709431\u6761\u8fde\u63a5<\/p>\n\n\n\n

Random\u663e\u793a\u7684\u662f432-node\u4e2d\u6bcf\u4e2anode\u90fd\u4f1a\u968f\u673a\u627e\u4e00\u4e2anode\u6765\u8fdb\u884c\u8fde\u63a5\uff0c\u6545\u4f1a\u6709431\u6761\u8fde\u63a5<\/p>\n\n\n\n

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\u62e5\u585e\u63a7\u5236<\/strong><\/p>\n\n\n\n

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1.\u907f\u514d\u62e5\u585e\u5d29\u6e83<\/p>\n\n\n\n

2.\u516c\u5e73<\/p>\n\n\n\n

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NDP\u5c40\u9650\u6027<\/strong><\/p>\n\n\n\n

\u8bba\u6587\u901a\u8fc7\u5b9e\u9a8c\u8bc1\u660e\u4e86\u5728\u5404\u79cd\u6d41\u91cf\u6a21\u5f0f\u4e2d\uff0cNDP\u63d0\u4f9b\u7684\u6548\u679c\u975e\u5e38\u63a5\u8fd1\u4e8eClos\u7f51\u7edc\u67b6\u6784\u7406\u8bba\u4e0a\u7684\u6548\u80fd\u3002\u5728\u975e\u5bf9\u8bc1\u7684\u7f51\u7edc\u67b6\u6784\u4e2d\uff0c\u5982BCube\u3001Jellyfish\uff0cNDP\u7684\u8868\u73b0\u4f1a\u7a0d\u5fae\u5dee\u4e00\u70b9\uff0c\u4e3b\u8981\u662f\u5f53\u7f51\u7edc\u62e5\u585e\u65f6\uff0c\u53d1\u9001\u7aef\u4f1a\u5c06\u62a5\u6587\u901a\u8fc7\u4e0d\u540c\u8ddd\u79bb\u7684\u8def\u5f84\u6765\u4f20\u8f93\u62a5\u6587(\u5c31\u4e0d\u662fECMP\u4e86)\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u82e5\u91c7\u7528sender-based per-path\u7684\u591a\u91cd\u8def\u7531\u5c31\u4f1a\u6709\u826f\u597d\u7684\u6548\u679c\u3002\u6709\u4e00\u7bc7\u8bba\u6587\u8ba8\u8bba\u4e0a\u8ff0\u7684\u95ee\u9898\uff1aC. Raiciu, S. Barre, C. Pluntke, A. Greenhalgh, D. Wischik, and M.Handley. Improving datacenter performance and robustness with Multipath TCP. InProc. ACM SIGCOMM, Aug. 2011\u3002<\/p>\n\n\n\n

\u5bf9\u4e8e\u9ad8\u8d1f\u8f7d\u6570\u636e\u4e2d\u5fc3\u6765\u8bf4\uff0c\u5f53\u62a5\u6587\u6570\u91cf\u8fc7\u591a\u65f6\uff0c\u4f1a\u4ea7\u751f\u53d1\u9001\u7aef\u53d1\u51fa\u7684\u62a5\u6587\u4e00\u76f4\u5904\u4e8e\u88ab\u622a\u65ad\u7684\u60c5\u51b5\uff0c\u5c3d\u7ba1\u8868\u73b0\u4e0d\u597d\uff0c\u4f46\u662f\u8ddf\u76ee\u524d\u5df2\u77e5\u7684\u534f\u8bae\uff0c\u5982DCTCP\u6bd4\u8d77\u6765\uff0cNDP\u7684\u6548\u80fd\u8fd8\u662f\u80dc\u51fa\u3002<\/p>\n\n\n\n

\u6700\u540e\u7684\u95ee\u9898\u5c31\u662f\u73af\u5883\u90e8\u7f72\u95ee\u9898\uff0c\u53ea\u5f53\u54ea\u4e00\u5929\u53ef\u7f16\u7a0b\u4ea4\u6362\u673a\u80fd\u591f\u5e7f\u6cdb\u90e8\u7f72\u5728\u6570\u636e\u4e2d\u5fc3\u65f6\uff0c\u8981\u90e8\u5c5eNDP\u5c31\u662f\u5f88\u5bb9\u6613\u7684\u4e8b\u60c5\u4e86\u3002\u6b64\u5916\uff0c\u5982\u4f55\u8ddf\u73b0\u6709\u7684TCP\u8fde\u63a5\u5171\u5b58\u4e5f\u662f\u4e00\u4e2a\u95ee\u9898\uff0c\u56e0\u4e3aNDP\u76ee\u524d\u4f1a\u5403\u6389\u8be5\u7f51\u7edc\u7684\u6d41\u91cf\u5bfc\u81f4 TCP\u51e0\u4e4e\u6ca1\u6cd5\u4f7f\u7528\uff0c\u56e0\u6b64\u5728\u53ef\u7f16\u7a0b\u4ea4\u6362\u673a\u7aef\u5e94\u8be5\u8981\u6709\u529e\u6cd5\u53bb\u5904\u7406\u76f8\u5173\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n

<\u5168\u6587\u7ed3\u675f><\/p>\n\n\n\n

\u5e0c\u671b\u672c\u6587\u80fd\u5bf9\u4e86\u89e3\u6570\u901a\u7f51\u7edc\u8bbe\u5907\u63d0\u4f9b\u4e00\u70b9\u7c97\u6d45\u7684\u611f\u6027\u8ba4\u8bc6\u3002
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