{"id":6604,"date":"2022-03-03T14:17:13","date_gmt":"2022-03-03T22:17:13","guid":{"rendered":"https:\/\/www.xh86.me\/?p=6604"},"modified":"2022-03-03T14:17:13","modified_gmt":"2022-03-03T22:17:13","slug":"%e6%9c%8d%e5%8a%a1%e8%b4%a8%e9%87%8f%e4%bf%9d%e8%af%81%e8%a7%84%e8%8c%83","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=6604","title":{"rendered":"\u670d\u52a1\u8d28\u91cf\u4fdd\u8bc1\u89c4\u8303"},"content":{"rendered":"
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\u200d<\/span>\u200d<\/span><\/p>\n<\/section>\n
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RFC2212\uff1aSpecification of Guaranteed Quality of Service\uff0cSeptember 1997<\/pre>\n<\/section>\n
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\u672c\u5907\u5fd8\u5f55\u7684\u72b6\u6001<\/strong><\/span><\/section>\n
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3\u3001 \u52a8\u673a<\/strong><\/span><\/section>\n
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\u4fdd\u8bc1\u670d\u52a1\u4fdd\u8bc1\u6570\u636e\u5305\u5c06\u5728\u4fdd\u8bc1\u7684\u4ea4\u4ed8\u65f6\u95f4\u5185\u5230\u8fbe\uff0c\u5e76\u4e14\u4e0d\u4f1a\u7531\u4e8e\u961f\u5217\u6ea2\u51fa\u800c\u88ab\u4e22\u5f03\uff0c\u524d\u63d0\u662f\u6d41\u7684\u6d41\u91cf\u4fdd\u6301\u5728\u5176\u6307\u5b9a\u7684\u6d41\u91cf\u53c2\u6570\u5185\u3002\u8be5\u670d\u52a1\u9002\u7528\u4e8e\u9700\u8981\u53ef\u9760\u4fdd\u8bc1\u6570\u636e\u5305\u5c06\u5728\u5176\u6e90\u4f20\u8f93\u540e\u7684\u67d0\u4e2a\u65f6\u95f4\u5230\u8fbe\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u4f8b\u5982\uff0c\u4e00\u4e9b\u97f3\u9891\u548c\u89c6\u9891\u201c\u56de\u653e\u201d\u5e94\u7528\u7a0b\u5e8f\u4e0d\u80fd\u5bb9\u5fcd\u4efb\u4f55\u6570\u636e\u5305\u5728\u5176\u56de\u653e\u65f6\u95f4\u4e4b\u540e\u5230\u8fbe\u3002\u5177\u6709\u4e25\u683c\u5b9e\u65f6\u8981\u6c42\u7684\u5e94\u7528\u7a0b\u5e8f\u4e5f\u9700\u8981\u6709\u4fdd\u8bc1\u7684\u670d\u52a1\u3002<\/p>\n
\u8be5\u670d\u52a1\u4e0d\u4f1a\u5c1d\u8bd5\u6700\u5c0f\u5316\u6296\u52a8\uff08\u6700\u5c0f\u548c\u6700\u5927\u6570\u636e\u5305\u5ef6\u8fdf\u4e4b\u95f4\u7684\u5dee\u5f02\uff09\uff1b\u5b83\u4ec5\u63a7\u5236\u6700\u5927\u6392\u961f\u5ef6\u8fdf\u3002\u56e0\u4e3a\u4fdd\u8bc1\u7684\u5ef6\u8fdf\u754c\u9650\u662f\u56fa\u5b9a\u7684\uff0c\u6240\u4ee5\u5ef6\u8fdf\u5fc5\u987b\u8bbe\u7f6e\u5f97\u8db3\u591f\u5927\uff0c\u4ee5\u6db5\u76d6\u6781\u5c11\u89c1\u7684\u957f\u65f6\u95f4\u6392\u961f\u5ef6\u8fdf\u7684\u60c5\u51b5\u3002\u591a\u9879\u7814\u7a76\u8868\u660e\uff0c\u7edd\u5927\u591a\u6570\u6570\u636e\u5305\u7684\u5b9e\u9645\u5ef6\u8fdf\u53ef\u80fd\u8fdc\u4f4e\u4e8e\u4fdd\u8bc1\u5ef6\u8fdf\u3002\u56e0\u6b64\uff0c\u56de\u653e\u5e94\u7528\u7a0b\u5e8f\u7684\u4f5c\u8005\u5e94\u8be5\u6ce8\u610f\uff0c\u6570\u636e\u5305\u901a\u5e38\u4f1a\u6bd4\u4ea4\u4ed8\u671f\u9650\u65e9\u5f97\u591a\uff0c\u5e76\u4e14\u5fc5\u987b\u5728\u63a5\u6536\u7cfb\u7edf\u8fdb\u884c\u7f13\u51b2\uff0c\u76f4\u5230\u5e94\u7528\u7a0b\u5e8f\u5904\u7406\u5b83\u4eec\u4e3a\u6b62\u3002<\/p>\n
\u8be5\u670d\u52a1\u4ee3\u8868\u4e86\u7f51\u7edc\u5ef6\u8fdf\u63a7\u5236\u7684\u4e00\u4e2a\u6781\u7aef\u3002\u5927\u591a\u6570\u5176\u4ed6\u63d0\u4f9b\u5ef6\u8fdf\u63a7\u5236\u7684\u670d\u52a1\u5bf9\u7531\u6b64\u4ea7\u751f\u7684\u5ef6\u8fdf\u63d0\u4f9b\u7684\u4fdd\u8bc1\u8981\u5f31\u5f97\u591a\u3002\u4e3a\u4e86\u63d0\u4f9b\u8fd9\u79cd\u9ad8\u6c34\u5e73\u7684\u4fdd\u8bc1\uff0c\u4fdd\u8bc1\u670d\u52a1\u901a\u5e38\u53ea\u6709\u5728\u7531\u8def\u5f84\u4e0a\u7684\u6bcf\u4e2a\u7f51\u7edc\u5143\u7d20\uff08\u5373\u7531\u8def\u7531\u5668\u548c\u4e92\u8fde\u8def\u7531\u5668\u7684\u94fe\u8def\uff09\u63d0\u4f9b\u65f6\u624d\u6709\u7528\u3002\u6b64\u5916\uff0c\u5982\u5bfc\u51fa\u4fe1\u606f\u90e8\u5206\u6240\u8ff0\uff0c\u670d\u52a1\u7684\u6709\u6548\u63d0\u4f9b\u548c\u4f7f\u7528\u8981\u6c42\u7528\u4e8e\u8bf7\u6c42\u670d\u52a1\u7684\u8bbe\u7f6e\u534f\u8bae\u6216\u5176\u4ed6\u673a\u5236\u5411\u4e2d\u95f4\u8def\u7531\u5668\u548c\u7aef\u70b9\u63d0\u4f9b\u670d\u52a1\u7279\u5f81\u3002<\/p>\n
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<\/div><\/section>\n
4\u3001 \u7f51\u5143\u6570\u636e\u5904\u7406\u8981\u6c42<\/strong><\/span><\/section>\n
<\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
\u7f51\u5143\u5fc5\u987b\u786e\u4fdd\u670d\u52a1\u63a5\u8fd1\u670d\u52a1\u7684\u201c\u6d41\u4f53\u6a21\u578b\u201d\u3002\u670d\u52a1\u901f\u7387\u4e3a R \u7684\u6d41\u4f53\u6a21\u578b\u672c\u8d28\u4e0a\u662f\u7531\u6e90\u548c\u63a5\u6536\u5668\u4e4b\u95f4\u7684\u5e26\u5bbd R \u7684\u4e13\u7528\u7ebf\u63d0\u4f9b\u7684\u670d\u52a1\u3002\u56e0\u6b64\uff0c\u5728\u4ee5\u56fa\u5b9a\u901f\u7387 R \u670d\u52a1\u7684\u6d41\u4f53\u6a21\u578b\u4e2d\uff0c\u6d41\u91cf\u7684\u670d\u52a1\u5b8c\u5168\u72ec\u7acb\u4e8e\u4efb\u4f55\u5176\u4ed6\u6d41\u91cf\u7684\u670d\u52a1\u3002<\/p>\n
\u6d41\u7684\u670d\u52a1\u7ea7\u522b\u5728\u6bcf\u4e2a\u7f51\u7edc\u5143\u7d20\u5904\u7531\u5e26\u5bbd\uff08\u6216\u670d\u52a1\u901f\u7387\uff09R \u548c\u7f13\u51b2\u533a\u5927\u5c0f B \u6765\u8868\u5f81\u3002R \u8868\u793a\u6d41\u6709\u6743\u4f7f\u7528\u7684\u94fe\u8def\u5e26\u5bbd\u4efd\u989d\uff0cB \u8868\u793a\u7f51\u7edc\u5143\u7d20\u4e2d\u7684\u7f13\u51b2\u533a\u7a7a\u95f4\u6d41\u91cf\u53ef\u80fd\u4f1a\u6d88\u8017\u3002\u7f51\u7edc\u5143\u7d20\u5fc5\u987b\u786e\u4fdd\u5176\u670d\u52a1\u4ee5\u76f8\u540c\u7684\u901f\u7387\u4e0e\u6d41\u4f53\u6a21\u578b\u5339\u914d\uff0c\u5e76\u5728\u4e00\u4e2a\u6025\u5267\u7684\u8bef\u5dee\u8303\u56f4\u5185\u3002<\/p>\n
\u4fdd\u8bc1\u670d\u52a1\u7684\u5b9a\u4e49\u4f9d\u8d56\u4e8e\u8fd9\u6837\u7684\u7ed3\u679c\uff1a\u53ea\u8981 R \u4e0d\u5c0f\u4e8e r\uff0c\u670d\u4ece\u4ee4\u724c\u6876 (r,b) \u5e76\u7531\u5e26\u5bbd\u4e3a R \u7684\u7ebf\u8def\u63d0\u4f9b\u670d\u52a1\u7684\u6d41\u7684\u6d41\u52a8\u5ef6\u8fdf\u53d7 b\/R \u7684\u9650\u5236\u3002\u5177\u6709\u670d\u52a1\u901f\u7387 R \u7684\u4fdd\u8bc1\u670d\u52a1\uff0c\u5176\u4e2d R \u662f\u5e26\u5bbd\u4efd\u989d\uff0c\u800c\u4e0d\u662f\u4e13\u7ebf\u7684\u5e26\u5bbd\uff0c\u8fd1\u4f3c\u4e8e\u8fd9\u79cd\u884c\u4e3a\u3002<\/p>\n
\u56e0\u6b64\uff0c\u7f51\u7edc\u5143\u7d20\u5fc5\u987b\u786e\u4fdd\u4efb\u4f55\u6570\u636e\u5305\u7684\u6392\u961f\u5ef6\u8fdf\u5c0f\u4e8e b\/R+C\/R+D\uff0c\u5176\u4e2d C \u548c D \u63cf\u8ff0\u4e86\u8fdc\u79bb\u6d41\u4f53\u6a21\u578b\u7684\u6700\u5927\u5c40\u90e8\u504f\u5dee\u3002\u91cd\u8981\u7684\u662f\u8981\u5f3a\u8c03 C \u548c D \u662f\u6700\u5927\u503c\u3002\u56e0\u6b64\uff0c\u4f8b\u5982\uff0c\u5982\u679c\u5b9e\u73b0\u4e2d\u5076\u5c14\u51fa\u73b0\u670d\u52a1\u4e2d\u65ad\uff08\u53ef\u80fd\u662f\u7531\u4e8e\u5904\u7406\u8def\u7531\u66f4\u65b0\uff09\uff0c\u5219 D \u9700\u8981\u8db3\u591f\u5927\uff0c\u4ee5\u8003\u8651\u6570\u636e\u5305\u5728\u670d\u52a1\u4e2d\u65ad\u671f\u95f4\u53ef\u80fd\u4e22\u5931\u7684\u65f6\u95f4\u3002\uff08C \u548c D \u5728\u5bfc\u51fa\u4fe1\u606f\u4e00\u8282\u4e2d\u6709\u66f4\u8be6\u7ec6\u7684\u63cf\u8ff0\uff09\u3002<\/p>\n
\u6ce8\u610f\uff1a\u4e25\u683c\u6765\u8bf4\uff0c\u8fd9\u4e2a\u5907\u5fd8\u5f55\u53ea\u8981\u6c42\u4e00\u4e2a\u6d41\u63a5\u6536\u7684\u670d\u52a1\u6c38\u8fdc\u4e0d\u4f1a\u6bd4\u5b83\u5728\u6d41\u4f53\u6a21\u578b\u7684\u8fd9\u79cd\u8fd1\u4f3c\u4e0b\u63a5\u6536\u5230\u7684\u66f4\u5dee\u3002\u63d0\u4f9b\u66f4\u597d\u7684\u670d\u52a1\u662f\u5b8c\u5168\u53ef\u4ee5\u63a5\u53d7\u7684\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4e00\u4e2a\u6d41\u5f53\u524d\u6ca1\u6709\u4f7f\u7528\u5b83\u7684\u4efd\u989d\uff0cR\uff0c\u8bf8\u5982\u52a0\u6743\u516c\u5e73\u961f\u5217\u4e4b\u7c7b\u7684\u7b97\u6cd5\u4f1a\u6682\u65f6\u4e3a\u5176\u4ed6\u6d41\u63d0\u4f9b\u672a\u4f7f\u7528\u7684\u5e26\u5bbd\uff0c\u8fd9\u662f\u5b8c\u5168\u53ef\u4ee5\u63a5\u53d7\u7684\uff08\u5b9e\u9645\u4e0a\u662f\u9f13\u52b1\u7684\uff09\u3002<\/strong><\/p>\n
\u4f5c\u4e3a\u4fdd\u8bc1\u670d\u52a1\u7684\u4e00\u90e8\u5206\uff0c\u4e0d\u5141\u8bb8\u94fe\u63a5\u5c06\u6570\u636e\u5305\u5206\u6bb5\u3002\u5927\u4e8e\u94fe\u8def MTU \u7684\u6570\u636e\u5305\u5fc5\u987b\u88ab\u76d1\u7ba1\u4e3a\u4e0d\u5408\u683c\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u5c06\u6839\u636e\u4e0b\u9762\u76d1\u7ba1\u90e8\u5206\u4e2d\u63cf\u8ff0\u7684\u89c4\u5219\u8fdb\u884c\u76d1\u7ba1\u3002<\/p>\n
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<\/div><\/section>\n
5\u3001 \u8c03\u7528\u4fe1\u606f<\/strong><\/span><\/section>\n
<\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
\u901a\u8fc7\u5411\u7f51\u7edc\u5143\u7d20\u6307\u5b9a\u6d41\u91cf (TSpec) \u548c\u6240\u9700\u670d\u52a1 (RSpec) \u6765\u8c03\u7528\u4fdd\u8bc1\u670d\u52a1\u3002\u5bf9\u5177\u6709\u65b0\u7684 TSpec \u548c\/\u6216 RSpec \u7684\u73b0\u6709\u6d41\u7684\u670d\u52a1\u8bf7\u6c42\u5e94\u8be5\u88ab\u89c6\u4e3a\u65b0\u7684\u8c03\u7528\uff0c\u56e0\u4e3a\u51c6\u5165\u63a7\u5236\u5e94\u8be5\u91cd\u65b0\u5e94\u7528\u4e8e\u6d41\u3002\u51cf\u5c11\u4ed6\u4eec\u7684 TSpec \u548c\/\u6216\u4ed6\u4eec\u7684 RSpec \u7684\u6d41\uff08\u5373\uff0c\u4ed6\u4eec\u7684\u65b0 TSpec\/RSpec \u4e25\u683c\u5c0f\u4e8e\u65e7\u7684 TSpec\/RSpec\uff0c\u6839\u636e\u4e0b\u9762\u7684\u6392\u5e8f\u90e8\u5206\u4e2d\u63cf\u8ff0\u7684\u6392\u5e8f\u89c4\u5219\uff09\u6c38\u8fdc\u4e0d\u5e94\u8be5\u88ab\u62d2\u7edd\u670d\u52a1\u3002<\/p>\n
TSpec \u91c7\u7528\u4ee4\u724c\u6876\u52a0\u4e0a\u5cf0\u503c\u901f\u7387 (p)\u3001\u6700\u5c0f\u76d1\u7ba1\u5355\u5143 (m) \u548c\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f (M) \u7684\u5f62\u5f0f\u3002<\/p>\n
\u4ee4\u724c\u6876\u5177\u6709\u6876\u6df1\u5ea6 b \u548c\u6876\u901f\u7387 r\u3002b \u548c r \u90fd\u5fc5\u987b\u662f\u6b63\u6570\u3002\u901f\u7387 r \u4ee5\u6bcf\u79d2 IP \u6570\u636e\u5305\u5b57\u8282\u6570\u4e3a\u5355\u4f4d\uff0c\u8303\u56f4\u4ece\u6bcf\u79d2 1 \u5b57\u8282\u5230\u6bcf\u79d2 40 TB\uff08\u6216\u63a5\u8fd1\u88ab\u8ba4\u4e3a\u662f\u5355\u80a1\u5149\u7ea4\u7684\u6700\u5927\u7406\u8bba\u5e26\u5bbd\uff09\u3002\u663e\u7136\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u5927\u5e26\u5bbd\uff0c\u53ea\u6709\u524d\u51e0\u4e2a\u6570\u5b57\u662f\u6709\u6548\u7684\uff0c\u56e0\u6b64\u9f13\u52b1\u4f7f\u7528\u6d6e\u70b9\u8868\u793a\uff0c\u7cbe\u5ea6\u81f3\u5c11\u4e3a 0.1%\u3002<\/p>\n
\u5b58\u50a8\u6876\u6df1\u5ea6 b \u4e5f\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\uff0c\u8303\u56f4\u4ece 1 \u5b57\u8282\u5230 250 GB\u3002\u540c\u6837\uff0c\u9f13\u52b1\u7cbe\u786e\u5230\u81f3\u5c11 0.1% \u7684\u6d6e\u70b9\u8868\u793a\u3002<\/p>\n
\u503c\u7684\u8303\u56f4\u6545\u610f\u8f83\u5927\u4ee5\u5141\u8bb8\u672a\u6765\u7684\u5e26\u5bbd\u3002\u8be5\u8303\u56f4\u5e76\u4e0d\u610f\u5473\u7740\u7f51\u7edc\u5143\u7d20\u5fc5\u987b\u652f\u6301\u6574\u4e2a\u8303\u56f4\u3002<\/p>\n
\u5cf0\u503c\u901f\u7387 p \u4ee5\u6bcf\u79d2 IP \u6570\u636e\u5305\u5b57\u8282\u6570\u4e3a\u5355\u4f4d\uff0c\u5177\u6709\u4e0e\u6876\u901f\u7387\u76f8\u540c\u7684\u8303\u56f4\u548c\u5efa\u8bae\u8868\u793a\u3002\u5cf0\u503c\u901f\u7387\u662f\u6e90\u548c\u4efb\u4f55\u6574\u5f62\u70b9\uff08\u6574\u5f62\u70b9\u5728\u4e0b\u9762\u5b9a\u4e49\uff09\u53ef\u4ee5\u5c06\u7a81\u53d1\u6d41\u91cf\u6ce8\u5165\u7f51\u7edc\u7684\u6700\u5927\u901f\u7387\u3002\u66f4\u51c6\u786e\u5730\u8bf4\uff0c\u8981\u6c42\u5bf9\u4e8e\u6240\u6709\u65f6\u95f4\u6bb5\uff0c\u53d1\u9001\u7684\u6570\u636e\u91cf\u4e0d\u80fd\u8d85\u8fc7 M+pT\uff0c\u5176\u4e2d M \u662f\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\uff0cT \u662f\u65f6\u95f4\u6bb5\u7684\u957f\u5ea6\u3002\u6b64\u5916\uff0cp \u5fc5\u987b\u5927\u4e8e\u6216\u7b49\u4e8e\u4ee4\u724c\u6876\u901f\u7387 r\u3002\u5982\u679c\u5cf0\u503c\u901f\u7387\u672a\u77e5\u6216\u672a\u6307\u5b9a\uff0c\u5219 p \u5fc5\u987b\u8bbe\u7f6e\u4e3a\u65e0\u7a77\u5927\u3002<\/p>\n
\u6700\u5c0f\u76d1\u7ba1\u5355\u4f4d m \u662f\u4e00\u4e2a\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u7684\u6574\u6570\u3002\u6240\u6709\u5927\u5c0f\u5c0f\u4e8e m \u7684 IP \u6570\u636e\u5305\u5728\u88ab\u76d1\u7ba1\u548c\u6d4b\u8bd5\u662f\u5426\u7b26\u5408 TSpec \u65f6\u90fd\u5c06\u88ab\u8ba1\u7b97\u4e3a\u5927\u5c0f\u4e3a m\u3002\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f M \u662f\u7b26\u5408\u6d41\u91cf\u89c4\u8303\u7684\u6700\u5927\u6570\u636e\u5305\uff1b\u5b83\u4e5f\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u3002\u5982\u679c\u8bf7\u6c42\u7684\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\u5927\u4e8e\u94fe\u8def\u7684 MTU\uff0c\u5219\u5fc5\u987b\u62d2\u7edd\u6d41\u3002m \u548c M \u90fd\u5fc5\u987b\u662f\u6b63\u6570\uff0c\u5e76\u4e14 m \u5fc5\u987b\u5c0f\u4e8e\u6216\u7b49\u4e8e M\u3002<\/p>\n
\u4fdd\u8bc1\u670d\u52a1\u4f7f\u7528\u53c2\u8003\u6587\u732e [8] \u4e2d\u5b9a\u4e49\u7684\u901a\u7528 TOKEN_BUCKET_TSPEC \u53c2\u6570\u6765\u63cf\u8ff0\u6570\u636e\u6d41\u7684\u6d41\u91cf\u7279\u5f81\u3002\u4e0a\u9762\u7684\u63cf\u8ff0\u662f\u5173\u4e8e\u90a3\u4e2a\u53c2\u6570\u7684\u3002TOKEN_BUCKET_TSPEC \u662f\u7b2c 127 \u53f7\u901a\u7528\u53c2\u6570\u3002\u5c06\u8fd9\u4e2a\u53c2\u6570\u7528\u4e8e\u4fdd\u8bc1\u670d\u52a1 TSpec \u7b80\u5316\u4e86\u591a\u670d\u52a1\u73af\u5883\u4e2d\u4fdd\u8bc1\u670d\u52a1\u7684\u4f7f\u7528\u3002<\/p>\n
RSpec \u662f\u4e00\u4e2a\u901f\u7387 R \u548c\u4e00\u4e2a\u5f39\u6027\u9879 S\uff0c\u5176\u4e2d R \u5fc5\u987b\u5927\u4e8e\u6216\u7b49\u4e8e r \u5e76\u4e14 S \u5fc5\u987b\u662f\u975e\u8d1f\u7684\u3002\u901f\u7387 R \u518d\u6b21\u4ee5\u6bcf\u79d2 IP \u6570\u636e\u5305\u7684\u5b57\u8282\u6570\u6765\u8861\u91cf\uff0c\u5177\u6709\u4e0e\u6876\u548c\u5cf0\u503c\u901f\u7387\u76f8\u540c\u7684\u8303\u56f4\u548c\u5efa\u8bae\u8868\u793a\u3002\u5f39\u6027\u9879 S \u4ee5\u5fae\u79d2\u4e3a\u5355\u4f4d\u3002RSpec \u901f\u7387\u53ef\u4ee5\u5927\u4e8e TSpec \u901f\u7387\uff0c\u56e0\u4e3a\u66f4\u9ad8\u7684\u901f\u7387\u4f1a\u51cf\u5c11\u6392\u961f\u5ef6\u8fdf\u3002\u5f39\u6027\u9879\u8868\u793a\u671f\u671b\u5ef6\u8fdf\u4e0e\u4f7f\u7528\u9884\u7559\u7ea7\u522b R \u83b7\u5f97\u7684\u5ef6\u8fdf\u4e4b\u95f4\u7684\u5dee\u5f02\u3002\u7f51\u7edc\u5143\u4ef6\u53ef\u4ee5\u5229\u7528\u8be5\u5f39\u6027\u9879\u6765\u51cf\u5c11\u5176\u5bf9\u8be5\u6d41\u7684\u8d44\u6e90\u9884\u7559\u3002\u5f53\u7f51\u7edc\u5143\u7d20\u9009\u62e9\u5229\u7528 RSpec \u4e2d\u7684\u4e00\u4e9b slack \u65f6\uff0c\u5b83\u5fc5\u987b\u9075\u5faa\u7279\u5b9a\u7684\u89c4\u5219\u6765\u66f4\u65b0 RSpec \u7684 R \u548c S \u5b57\u6bb5\uff1b\u8fd9\u4e9b\u89c4\u5219\u5728\u6392\u5e8f\u548c\u5408\u5e76\u90e8\u5206\u4e2d\u6307\u5b9a\u3002\u5982\u679c\u5728\u670d\u52a1\u8c03\u7528\u65f6\u6ca1\u6709\u6307\u5b9a\u5f39\u6027\uff0c\u5219\u5f39\u6027\u9879 S \u8bbe\u7f6e\u4e3a\u96f6\u3002RSpec \u4e2d\u4e0d\u5305\u542b\u7f13\u51b2\u533a\u89c4\u8303\uff0c\u56e0\u4e3a\u9884\u8ba1\u7f51\u7edc\u5143\u7d20\u4f1a\u6d3e\u751f\u6240\u9700\u7684\u7f13\u51b2\u533a\u7a7a\u95f4\uff0c\u4ee5\u786e\u4fdd TSpec \u4e2d\u7684\u4ee4\u724c\u6876\u548c\u5cf0\u503c\u901f\u7387\u6ca1\u6709\u6392\u961f\u4e22\u5931\uff0cRSpec \u4e2d\u7684\u4fdd\u7559\u901f\u7387\u548c\u5f39\u6027\uff0c\u5bfc\u51fa\u7684\u4fe1\u606f\u5728\u7f51\u7edc\u5143\u7d20\uff0c\u5373 Ctot \u548c Dtot \u6216 Csum \u548c Dsum\uff0c\u4e0e\u6709\u5173\u8be5\u5143\u7d20\u5982\u4f55\u7ba1\u7406\u5176\u6d41\u91cf\u7684\u5185\u90e8\u4fe1\u606f\u76f8\u7ed3\u5408\u3002<\/p>\n
TSpec \u53ef\u4ee5\u7531\u4e09\u4e2a\u5355\u7cbe\u5ea6 IEEE \u6d6e\u70b9\u683c\u5f0f\u7684\u6d6e\u70b9\u6570\u540e\u8ddf\u4e24\u4e2a\u7f51\u7edc\u5b57\u8282\u987a\u5e8f\u7684 32 \u4f4d\u6574\u6570\u8868\u793a\u3002\u7b2c\u4e00\u4e2a\u6d6e\u70b9\u503c\u662f\u901f\u7387 (r)\uff0c\u7b2c\u4e8c\u4e2a\u6d6e\u70b9\u503c\u662f\u6876\u5927\u5c0f (b)\uff0c\u7b2c\u4e09\u4e2a\u6d6e\u70b9\u503c\u662f\u5cf0\u503c\u901f\u7387 (p)\uff0c\u7b2c\u4e00\u4e2a\u6574\u6570\u662f\u6700\u5c0f\u76d1\u7ba1\u5355\u5143 (m)\uff0c\u4ee5\u53ca\u7b2c\u4e8c\u4e2a\u6574\u6570\u662f\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\uff08M\uff09\u3002<\/p>\n
RSpec \u901f\u7387\u9879 R \u4e5f\u53ef\u4ee5\u4f7f\u7528\u5355\u7cbe\u5ea6 IEEE \u6d6e\u70b9\u6570\u8868\u793a\u3002<\/p>\n
Slack \u9879 S \u53ef\u4ee5\u8868\u793a\u4e3a 32 \u4f4d\u6574\u6570\u3002\u5b83\u7684\u503c\u53ef\u4ee5\u4ece 0 \u5230 (2^32)-1 \u5fae\u79d2\u3002<\/p>\n
\u5f53 r\u3001b\u3001p \u548c R \u9879\u8868\u793a\u4e3a IEEE \u6d6e\u70b9\u503c\u65f6\uff0c\u7b26\u53f7\u4f4d\u5fc5\u987b\u4e3a\u96f6\uff08\u6240\u6709\u503c\u5fc5\u987b\u4e3a\u975e\u8d1f\u6570\uff09\u3002\u7981\u6b62\u4f7f\u7528\u5c0f\u4e8e 127\uff08\u5373 0\uff09\u7684\u6307\u6570\u3002\u4e0d\u9f13\u52b1\u4f7f\u7528\u5927\u4e8e 162\uff08\u5373\u6b63 35\uff09\u7684\u6307\u6570\uff0c\u9664\u975e\u6307\u5b9a\u65e0\u7a77\u5927\u7684\u5cf0\u503c\u901f\u7387\u3002\u65e0\u7a77\u5927\u7528\u5168\u4e3a 1 \u7684\u6307\u6570 (255) \u4ee5\u53ca\u5168\u96f6\u7684\u7b26\u53f7\u4f4d\u548c\u5c3e\u6570\u6765\u8868\u793a\u3002<\/p>\n
\n
\n
\n
<\/div><\/section>\n
6\u3001 \u5bfc\u51fa\u4fe1\u606f<\/strong><\/span><\/section>\n
<\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
\u6bcf\u4e2a\u4fdd\u8bc1\u670d\u52a1\u6a21\u5757\u5fc5\u987b\u81f3\u5c11\u5bfc\u51fa\u4ee5\u4e0b\u4fe1\u606f\u3002\u4e0b\u9762\u63cf\u8ff0\u7684\u6240\u6709\u53c2\u6570\u90fd\u662f\u8868\u5f81\u53c2\u6570\u3002<\/p>\n
\u4e00\u4e2a\u7f51\u7edc\u5143\u7d20\u7684\u4fdd\u8bc1\u670d\u52a1\u7684\u5b9e\u73b0\u7531\u4e24\u4e2a\u9519\u8bef\u9879 C \u548c D \u6765\u8868\u5f81\uff0c\u5b83\u4eec\u8868\u793a\u8be5\u5143\u7d20\u7684\u4fdd\u8bc1\u670d\u52a1\u7684\u5b9e\u73b0\u5982\u4f55\u504f\u79bb\u6d41\u4f53\u6a21\u578b\u3002\u8fd9\u4e24\u4e2a\u53c2\u6570\u6709\u4e00\u4e2a\u52a0\u6cd5\u5408\u6210\u89c4\u5219\u3002<\/p>\n
\u8bef\u5dee\u9879 C \u662f\u4e0e\u901f\u7387\u76f8\u5173\u7684\u8bef\u5dee\u9879\u3002\u5b83\u8868\u793a\u7531\u4e8e\u6d41\u7684\u901f\u7387\u53c2\u6570\uff0c\u6d41\u4e2d\u7684\u6570\u636e\u5305\u53ef\u80fd\u7ecf\u5386\u7684\u5ef6\u8fdf\u3002\u8fd9\u79cd\u9519\u8bef\u9879\u7684\u4e00\u4e2a\u4f8b\u5b50\u662f\u9700\u8981\u8003\u8651\u4e32\u884c\u5316\u6570\u636e\u5305\u6240\u82b1\u8d39\u7684\u65f6\u95f4\uff0c\u8fd9\u4e9b\u6570\u636e\u5305\u88ab\u5206\u89e3\u6210 ATM \u4fe1\u5143\uff0c\u4fe1\u5143\u4ee5 1\/r \u7684\u9891\u7387\u53d1\u9001\u3002<\/p>\n
\u6ce8\u610f\uff1a\u91cd\u8981\u7684\u662f\u8981\u6ce8\u610f\uff0c\u5728\u8ba1\u7b97\u5ef6\u8fdf\u754c\u9650\u65f6\uff0c\u53c2\u6570 C \u9664\u4ee5\u4fdd\u7559\u7387 R\u3002\u8fd9\u79cd\u9664\u6cd5\u662f\u56e0\u4e3a\u4e0e\u5e8f\u5217\u5316\u6570\u636e\u5305\u7684\u793a\u4f8b\u4e00\u6837\uff0cC \u9879\u7684\u6548\u679c\u662f\u4f20\u8f93\u901f\u7387\u3002\u5b9e\u65bd\u8005\u5e94\u6ce8\u610f\u786e\u8ba4\u4ed6\u4eec\u7684 C \u503c\u9664\u4ee5\u4e0d\u540c\u7684\u6bd4\u7387\u65f6\uff0c\u4f1a\u7ed9\u51fa\u9002\u5f53\u7684\u7ed3\u679c\u3002\u4e0d\u4f9d\u8d56\u4e8e\u901f\u7387\u7684\u5ef6\u8fdf\u503c\u5e94\u8be5\u5305\u542b\u5728 D \u53c2\u6570\u7684\u503c\u4e2d\u3002<\/strong><\/p>\n
\u8bef\u5dee\u9879 D \u662f\u4e0e\u901f\u7387\u65e0\u5173\u7684\u6bcf\u4e2a\u5143\u7d20\u7684\u8bef\u5dee\u9879\uff0c\u8868\u793a\u901a\u8fc7\u670d\u52a1\u5143\u7d20\u7684\u6700\u574f\u60c5\u51b5\u4e0b\u7684\u975e\u57fa\u4e8e\u901f\u7387\u7684\u4f20\u8f93\u65f6\u95f4\u53d8\u5316\u3002\u5b83\u901a\u5e38\u5728\u5f15\u5bfc\u6216\u914d\u7f6e\u65f6\u786e\u5b9a\u6216\u8bbe\u7f6e\u3002D \u7684\u4e00\u4e2a\u793a\u4f8b\u662f\u65f6\u9699\u7f51\u7edc\uff0c\u5176\u4e2d\u4fdd\u8bc1\u6d41\u5728\u65f6\u9699\u5faa\u73af\u4e2d\u88ab\u5206\u914d\u7279\u5b9a\u65f6\u9699\u3002\u6bcf\u6d41\u5ef6\u8fdf\u7684\u67d0\u4e9b\u90e8\u5206\u53ef\u4ee5\u7531\u5faa\u73af\u4e2d\u7684\u54ea\u4e9b\u65f6\u9699\u5206\u914d\u7ed9\u6d41\u6765\u786e\u5b9a\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cD \u5c06\u6d4b\u91cf\u4e00\u4e2a\u6d41\u7684\u6570\u636e\uff0c\u4e00\u65e6\u51c6\u5907\u597d\u53d1\u9001\uff0c\u53ef\u80fd\u5fc5\u987b\u7b49\u5f85\u4e00\u4e2a\u65f6\u9699\u7684\u6700\u957f\u65f6\u95f4\u3002\uff08\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e2a\u503c\u53ef\u4ee5\u5728\u5206\u914d\u65f6\u9699\u4e4b\u524d\u8ba1\u7b97\u51fa\u6765\uff0c\u56e0\u6b64\u53ef\u4ee5\u88ab\u901a\u544a\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u6709 100 \u4e2a\u65f6\u9699\u3002\u5728\u6700\u574f\u7684\u60c5\u51b5\u4e0b\uff0c\u4e00\u4e2a\u6d41\u53ef\u80fd\u4f1a\u5c06\u5176\u6240\u6709 N \u4e2a\u65f6\u9699\u805a\u96c6\u5728\u4e00\u8d77\uff0c\u8fd9\u6837\u5982\u679c\u4e00\u4e2a\u6570\u636e\u5305\u662f\u5728\u96c6\u7fa4\u7ed3\u675f\u540e\u51c6\u5907\u53d1\u9001\uff0c\u6570\u636e\u5305\u53ef\u80fd\u9700\u8981\u7b49\u5f85 100-N \u4e2a\u65f6\u9699\u624d\u80fd\u53d1\u9001\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c06 D \u8bbe\u7f6e\u4e3a 100 \u4e2a\u65f6\u9699\u6765\u8f7b\u677e\u8fd1\u4f3c\u6b64\u5ef6\u8fdf\uff09\u3002<\/p>\n
\u5982\u679c\u6cbf\u6574\u4e2a\u8def\u5f84\u5e94\u7528\u7ec4\u5408\u51fd\u6570\u6765\u8ba1\u7b97 C \u548c D\uff08Ctot \u548c Dtot\uff09\u7684\u7aef\u5230\u7aef\u603b\u548c\uff0c\u7136\u540e\u5c06\u7ed3\u679c\u503c\u63d0\u4f9b\u7ed9\u7aef\u8282\u70b9\uff08\u53ef\u80fd\u901a\u8fc7\u8bbe\u7f6e\u534f\u8bae\uff09\uff0c\u7aef\u8282\u70b9\u53ef\u4ee5\u8ba1\u7b97\u6700\u5927\u6570\u636e\u5305\u6392\u961f\u5ef6\u8fdf\u3002\u6b64\u5916\uff0c\u5982\u679c\u4ece\u6700\u8fd1\u7684\u6574\u5f62\u70b9\uff08\u6574\u5f62\u70b9\u5728\u4e0b\u9762\u5b9a\u4e49\uff09\u4e0b\u6e38\u5230\u63a5\u6536\u5668\u7684\u90e8\u5206\u548c\uff08Csum \u548c Dsum\uff09\u88ab\u4f20\u9012\u7ed9\u6bcf\u4e2a\u7f51\u7edc\u5143\u7d20\uff0c\u90a3\u4e48\u8fd9\u4e9b\u7f51\u7edc\u5143\u7d20\u53ef\u4ee5\u8ba1\u7b97\u5b9e\u73b0\u4e0d\u4e22\u5931\u6570\u636e\u5305\u6240\u5fc5\u9700\u7684\u7f13\u51b2\u533a\u5206\u914d\uff0c\u5982\u5728\u5b9e\u65bd\u8005\u6307\u5357\u4e00\u8282\u4e2d\u6709\u8be6\u7ec6\u8bf4\u660e\u3002\u6b63\u786e\u4f7f\u7528\u548c\u63d0\u4f9b\u6b64\u670d\u52a1\u9700\u8981\u8ba1\u7b97\u91cf Ctot \u548c Dtot\uff0c\u4ee5\u53ca\u91cf Csum \u548c Dsum\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5047\u8bbe\u4fdd\u8bc1\u670d\u52a1\u7684\u4f7f\u7528\u5c06\u4e3b\u8981\u5728\u8fd9\u4e9b\u6570\u91cf\u53ef\u4f9b\u7ec8\u7aef\u8282\u70b9\u548c\u7f51\u7edc\u5143\u7d20\u4f7f\u7528\u7684\u73af\u5883\u4e2d\u4f7f\u7528\u3002<\/p>\n
\u8bef\u5dee\u9879 C \u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u6d4b\u91cf\u3002\u5355\u4e2a\u5143\u7d20\u53ef\u4ee5\u5ba3\u4f20 1 \u5230 2^28\uff08\u7565\u8d85\u8fc7 250 \u5146\u5b57\u8282\uff09\u4e4b\u95f4\u7684 C \u503c\uff0c\u5e76\u4e14\u6240\u6709\u5143\u7d20\u7684\u603b\u6dfb\u52a0\u503c\u53ef\u4ee5\u9ad8\u8fbe (2^32)-1\u3002\u5982\u679c\u4e0d\u540c\u5143\u7d20\u5ef6\u8fdf\u7684\u603b\u548c\u8d85\u8fc7 (2^32)-1\uff0c\u7aef\u5230\u7aef\u8bef\u5dee\u9879\u5fc5\u987b\u8bbe\u7f6e\u4e3a (2^32)-1\u3002<\/p>\n
\u8bef\u5dee\u9879 D \u4ee5\u4e00\u5fae\u79d2\u4e3a\u5355\u4f4d\u8fdb\u884c\u6d4b\u91cf\u3002\u5355\u4e2a\u5143\u7d20\u53ef\u4ee5\u5ba3\u4f20 1 \u5230 2^28 \u4e4b\u95f4\u7684\u5ef6\u8fdf\u503c\uff08\u7a0d\u5fae\u8d85\u8fc7\u4e24\u5206\u949f\uff09\uff0c\u5e76\u4e14\u6dfb\u52a0\u5230\u6240\u6709\u5143\u7d20\u7684\u603b\u5ef6\u8fdf\u8303\u56f4\u53ef\u4ee5\u9ad8\u8fbe (2^32)-1\u3002\u5982\u679c\u4e0d\u540c\u5143\u7d20\u5ef6\u8fdf\u7684\u603b\u548c\u8d85\u8fc7 (2^32)-1\uff0c\u7aef\u5230\u7aef\u5ef6\u8fdf\u5fc5\u987b\u8bbe\u7f6e\u4e3a (2^32)-1\u3002<\/p>\n
\u4fdd\u8bc1\u670d\u52a1\u662f service_name 2\u3002<\/p>\n
RSpec \u53c2\u6570\u7f16\u53f7\u4e3a 130\u3002<\/p>\n
\u9519\u8bef\u8868\u5f81\u53c2\u6570 C \u548c D \u7f16\u53f7\u4e3a 131 \u548c 132\u3002C \u548c D \u7684\u7aef\u5230\u7aef\u7ec4\u5408\u503c\uff08Ctot \u548c Dtot\uff09\u7f16\u53f7\u4e3a 133 \u548c 134\u3002C \u548c D \u7684\u81ea\u4e0a\u6b21\u6574\u5f62\u70b9\u7ec4\u5408\u503c\uff08Csum\u548c Dsum) \u7f16\u53f7\u4e3a 135 \u548c 136\u3002<\/p>\n
\n
\n
\n
<\/div><\/section>\n
7\u3001 \u76d1\u7ba1<\/strong><\/span><\/section>\n
<\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
\u6709\u4fdd\u8bc1\u7684\u670d\u52a1\u6709\u4e24\u79cd\u76d1\u7ba1\u5f62\u5f0f\u3002\u4e00\u79cd\u5f62\u5f0f\u662f\u7b80\u5355\u76d1\u7ba1\uff08\u4ee5\u4e0b\u7b80\u79f0\u76d1\u7ba1\u4ee5\u4e0e\u5176\u4ed6\u6587\u6863\u4fdd\u6301\u4e00\u81f4\uff09\uff0c\u5176\u4e2d\u5c06\u5230\u8fbe\u7684\u6d41\u91cf\u4e0e TSpec \u8fdb\u884c\u6bd4\u8f83\u3002\u53e6\u4e00\u79cd\u5f62\u5f0f\u662f\u6574\u5f62\uff0c\u5c1d\u8bd5\u6062\u590d\uff08\u53ef\u80fd\u5931\u771f\uff09\u6d41\u91cf\u7684\u5f62\u72b6\u4ee5\u7b26\u5408 TSpec\uff0c\u5e76\u4e14\u53d1\u73b0\u6d41\u91cf\u8fdd\u53cd TSpec \u7684\u4e8b\u5b9e\u662f\u56e0\u4e3a\u6574\u5f62\u5931\u8d25\uff08\u6574\u5f62\u7f13\u51b2\u533a\u6ea2\u51fa\uff09\u3002<\/p>\n
\u76d1\u7ba1\u5728\u7f51\u7edc\u8fb9\u7f18\u5b8c\u6210\u3002\u5728\u6240\u6709\u5f02\u6784\u6e90\u5206\u652f\u70b9\u548c\u6240\u6709\u6e90\u5408\u5e76\u70b9\u8fdb\u884c\u6574\u5f62\u3002\u5f02\u6784\u6e90\u5206\u652f\u70b9\u662f\u591a\u64ad\u5206\u53d1\u6811\u4ece\u4e00\u4e2a\u6e90\u5206\u652f\u5230\u591a\u4e2a\u4e0d\u540c\u8def\u5f84\u7684\u70b9\uff0c\u5e76\u4e14\u5404\u4e2a\u4f20\u51fa\u94fe\u8def\u4e0a\u7684\u4fdd\u7559\u7684TSpec\u90fd\u4e0d\u76f8\u540c\u3002\u4ec5\u5f53\u4f20\u51fa\u94fe\u8def\u4e0a\u7684 TSpec\u201c\u5c0f\u4e8e\u201d\uff08\u5728\u6392\u5e8f\u90e8\u5206\u4e2d\u63cf\u8ff0\u7684\u610f\u4e49\u4e0a\uff09\u5728\u7d27\u90bb\u4e0a\u6e38\u94fe\u8def\u4e0a\u4fdd\u7559\u7684 TSpec \u65f6\u624d\u9700\u8981\u8fdb\u884c\u6574\u5f62\u3002\u6e90\u5408\u5e76\u70b9\u662f\u6765\u81ea\u4e24\u4e2a\u4e0d\u540c\u6e90\uff08\u5171\u4eab\u76f8\u540c\u9884\u7559\uff09\u7684\u5206\u5e03\u8def\u5f84\u6216\u6811\u5408\u5e76\u7684\u5730\u65b9\u3002\u670d\u52a1\u8c03\u7528\u8005\uff08\u8bbe\u7f6e\u534f\u8bae\u3001\u672c\u5730\u914d\u7f6e\u5de5\u5177\u6216\u7c7b\u4f3c\u673a\u5236\uff09\u6709\u8d23\u4efb\u786e\u5b9a\u9700\u8981\u76d1\u7ba1\u7684\u70b9\u3002\u53ef\u4ee5\u5728\u5176\u4ed6\u70b9\u4ee5\u53ca\u4e0a\u8ff0\u90a3\u4e9b\u70b9\u5904\u8fdb\u884c\u6574\u5f62\u3002\u9664\u5728\u7f51\u7edc\u8fb9\u7f18\u5916\uff0c\u4e0d\u5f97\u8fdb\u884c\u76d1\u7ba1\u3002<\/p>\n
\u4ee4\u724c\u6876\u548c\u5cf0\u503c\u901f\u7387\u53c2\u6570\u8981\u6c42\u6d41\u91cf\u5fc5\u987b\u9075\u5b88\u89c4\u5219\uff0c\u5373\u5728\u6240\u6709\u65f6\u95f4\u6bb5\u5185\uff0c\u53d1\u9001\u7684\u6570\u636e\u91cf\u4e0d\u80fd\u8d85\u8fc7 M+min[pT, rT+bM]\uff0c\u5176\u4e2d r \u548c b \u662f\u4ee4\u724c\u6876\u53c2\u6570\uff0cM \u662f\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\uff0cT \u662f\u65f6\u95f4\u6bb5\u7684\u957f\u5ea6\uff08\u8bf7\u6ce8\u610f\uff0c\u5f53 p \u4e3a\u65e0\u9650\u65f6\uff0c\u8fd9\u4f1a\u964d\u4f4e\u5230\u6807\u51c6\u4ee4\u724c\u6876\u8981\u6c42\uff09\u3002\u51fa\u4e8e\u6b64\u8ba1\u8d39\u7684\u76ee\u7684\uff0c\u94fe\u8def\u5fc5\u987b\u5c06\u5c0f\u4e8e\u6700\u5c0f\u76d1\u7ba1\u5355\u5143\u7684\u6570\u636e\u5305\u8ba1\u6570\u4e3a\u5927\u5c0f\u4e3a m\u3002\u5230\u8fbe\u4e00\u4e2a\u5143\u7d20\u5e76\u5bfc\u81f4\u8fdd\u53cd M+min[pT, rT+b-M] \u754c\u9650\u7684\u6570\u636e\u5305\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5408\u683c\u7684\u3002<\/p>\n
\u5728\u7f51\u7edc\u8fb9\u7f18\uff0c\u6d41\u91cf\u53d7\u5230\u76d1\u7ba1\uff0c\u4ee5\u786e\u4fdd\u5176\u7b26\u5408\u4ee4\u724c\u6876\u3002\u4e0d\u5408\u683c\u7684\u6570\u636e\u5305\u5e94\u8be5\u88ab\u89c6\u4e3a\u5c3d\u529b\u800c\u4e3a\u7684\u6570\u636e\u5305\u3002[\u5982\u679c\u5e76\u4e14\u5f53\u6807\u8bb0\u80fd\u529b\u53d8\u5f97\u53ef\u7528\u65f6\uff0c\u8fd9\u4e9b\u4e0d\u7b26\u5408\u8981\u6c42\u7684\u6570\u636e\u5305\u5e94\u8be5\u88ab\u201c\u6807\u8bb0\u201d\u4e3a\u4e0d\u7b26\u5408\u8981\u6c42\uff0c\u7136\u540e\u5728\u6240\u6709\u540e\u7eed\u8def\u7531\u5668\u4e2d\u88ab\u89c6\u4e3a\u5c3d\u529b\u800c\u4e3a\u6570\u636e\u5305\u3002]<\/p>\n
\u5c3d\u529b\u800c\u4e3a\u670d\u52a1\u88ab\u5b9a\u4e49\u4e3a\u7f51\u7edc\u5143\u7d20\u5c06\u63d0\u4f9b\u7ed9\u4e0d\u5c5e\u4e8e\u6d41\u7684\u6570\u636e\u5305\u7684\u9ed8\u8ba4\u670d\u52a1\uff0c\u8be5\u6570\u636e\u5305\u5728\u6d41\u7684\u6e90\u548c\u76ee\u6807\u4e4b\u95f4\u53d1\u9001\u3002\u9664\u5176\u4ed6\u542b\u4e49\u5916\uff0c\u6b64\u5b9a\u4e49\u610f\u5473\u7740\u5982\u679c\u5c06\u6d41\u7684\u6570\u636e\u5305\u66f4\u6539\u4e3a\u5c3d\u529b\u800c\u4e3a\u6570\u636e\u5305\uff0c\u5219\u901a\u5e38\u5e94\u7528\u4e8e\u5c3d\u529b\u800c\u4e3a\u6570\u636e\u5305\u7684\u6240\u6709\u6d41\u63a7\u5236\uff08\u4f8b\u5982\uff0cRED [2]\uff09\u4e5f\u5e94\u7528\u4e8e\u8be5\u6570\u636e\u5305\u3002<\/p>\n
\u6ce8\u610f\uff1a\u53ef\u80fd\u5b58\u5728\u672c\u6587\u6863\u8303\u56f4\u4e4b\u5916\u7684\u60c5\u51b5\uff0c\u4f8b\u5982\u5f53\u670d\u52a1\u6a21\u5757\u7684\u4fdd\u8bc1\u670d\u52a1\u5b9e\u73b0\u88ab\u7528\u4e8e\u5b9e\u73b0\u6d41\u91cf\u5171\u4eab\u800c\u4e0d\u662f\u670d\u52a1\u8d28\u91cf\u65f6\uff0c\u6240\u9700\u7684\u64cd\u4f5c\u662f\u4e22\u5f03\u4e0d\u5408\u683c\u7684\u6570\u636e\u5305\u3002\u4e3a\u4e86\u5141\u8bb8\u8fd9\u6837\u7684\u4f7f\u7528\uff0c\u5b9e\u73b0\u8005\u5e94\u8be5\u786e\u4fdd\u5bf9\u4e0d\u5408\u683c\u6570\u636e\u5305\u91c7\u53d6\u7684\u884c\u52a8\u662f\u53ef\u914d\u7f6e\u7684\u3002<\/p>\n
\u5728\u7f51\u7edc\u5185\u90e8\uff0c\u76d1\u7ba1\u4e0d\u4f1a\u4ea7\u751f\u9884\u671f\u7684\u7ed3\u679c\uff0c\u56e0\u4e3a\u6392\u961f\u6548\u5e94\u5076\u5c14\u4f1a\u5bfc\u81f4\u8fdb\u5165\u7f51\u7edc\u7684\u6d41\u91cf\u5728\u67d0\u4e9b\u4e0b\u6e38\u7f51\u7edc\u5143\u7d20\u5904\u4e0d\u518d\u7b26\u5408\u8981\u6c42\u3002\u56e0\u6b64\uff0c\u5728\u7f51\u7edc\u5185\u90e8\uff0c\u5e0c\u671b\u76d1\u7ba1\u6d41\u91cf\u7684\u7f51\u7edc\u5143\u7d20\u5fc5\u987b\u901a\u8fc7\u6574\u5f62\u4ee4\u724c\u6876\u7684\u6d41\u91cf\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u6574\u5f62\u9700\u8981\u5ef6\u8fdf\u6570\u636e\u5305\uff0c\u76f4\u5230\u5b83\u4eec\u7b26\u5408 TSpec\u3002<\/p>\n
\u6574\u5f62\u662f\u901a\u8fc7\u5c06\u7f13\u51b2\u533a\u4e0e\u4ee4\u724c\u6876\u548c\u5cf0\u503c\u901f\u7387\u8c03\u8282\u5668\u7ec4\u5408\u5e76\u7f13\u51b2\u6570\u636e\u76f4\u5230\u53ef\u4ee5\u6309\u7167\u4ee4\u724c\u6876\u548c\u5cf0\u503c\u901f\u7387\u53c2\u6570\u53d1\u9001\u7684\u3002\uff08\u4ee4\u724c\u6876\u8c03\u8282\u5668\u5fc5\u987b\u4ece\u5176\u5145\u6ee1\u4ee4\u724c\u7684\u4ee4\u724c\u6876\u5f00\u59cb\uff09\u3002\u5728\u4fdd\u8bc1\u670d\u52a1\u7684\u60c5\u51b5\u4e0b\uff0c\u5c06\u4efb\u4f55\u7b26\u5408\u8981\u6c42\u7684\u6d41\u91cf\u91cd\u65b0\u6574\u5f62\u56de\u5176\u539f\u59cb\u4ee4\u724c\u6876\u5f62\u72b6\u6240\u9700\u7684\u7f13\u51b2\u91cf\u4e3a b+Csum+(Dsum*r)\uff0c\u5176\u4e2d Csum \u548c Dsum \u662f\u6700\u540e\u4e00\u4e2a\u6574\u5f62\u70b9\u548c\u4e4b\u95f4\u7684\u53c2\u6570 C \u548c D \u7684\u603b\u548c\u5f53\u524d\u7684\u6574\u5f62\u70b9\u3002\u8bf7\u6ce8\u610f\uff0c\u6574\u5f62\u5668\u5cf0\u503c\u901f\u7387\u7684\u77e5\u8bc6\u53ef\u7528\u4e8e\u51cf\u5c11\u8fd9\u4e9b\u7f13\u51b2\u533a\u9700\u6c42\uff08\u8bf7\u53c2\u9605\u4e0b\u9762\u7684\u201c\u5b9e\u65bd\u8005\u6307\u5357\u201d\u90e8\u5206\uff09\u3002\u7f51\u7edc\u5143\u7d20\u5fc5\u987b\u63d0\u4f9b\u5fc5\u8981\u7684\u7f13\u51b2\u533a\uff0c\u4ee5\u786e\u4fdd\u4e00\u81f4\u7684\u6d41\u91cf\u4e0d\u4f1a\u5728\u6574\u5f62\u5668\u4e2d\u4e22\u5931\u3002<\/p>\n
\u6ce8\u610f\uff1a\u901a\u8fc7\u89c2\u5bdf\u6d41\u7684\u6392\u961f\u6d41\u91cf\u4f55\u65f6\u8d85\u8fc7 b+Csum+(Dsum*r)\uff0c\u53ef\u4ee5\u89c2\u5bdf\u5230\u672a\u8fdb\u884c\u6574\u5f62\u7684\u8def\u7531\u5668\u4ecd\u7136\u53ef\u4ee5\u8bc6\u522b\u4e0d\u5408\u683c\u7684\u6570\u636e\u5305\uff08\u5e76\u4e22\u5f03\u5b83\u4eec\u6216\u5c06\u5b83\u4eec\u5b89\u6392\u5728\u8f83\u4f4e\u7684\u4f18\u5148\u7ea7\u4e0a\uff09\u3002<\/strong><\/p>\n
\u5982\u679c\u6570\u636e\u5305\u5230\u8fbe\u65f6\u53d1\u73b0\u6574\u5f62\u7f13\u51b2\u533a\u5df2\u6ee1\uff0c\u5219\u8be5\u6570\u636e\u5305\u4e0d\u5408\u683c\u3002\u8bf7\u6ce8\u610f\uff0c\u8fd9\u610f\u5473\u7740\u6574\u5f62\u8005\u4e5f\u5728\u6709\u6548\u5730\u8fdb\u884c\u76d1\u7ba1\u3002\u4e0e\u76d1\u7ba1\u8005\u4e00\u6837\uff0c\u6574\u5f62\u8005\u5e94\u8be5\u5c3d\u6700\u5927\u52aa\u529b\u5c06\u4e0d\u5408\u683c\u7684\u6570\u636e\u5305\u964d\u7ea7\u3002[\u5982\u679c\u6807\u8bb0\u53ef\u7528\uff0c\u4e0d\u5408\u683c\u7684\u6570\u636e\u5305\u5e94\u8be5\u88ab\u6807\u8bb0]<\/p>\n
\u6ce8\u610f\uff1a\u4e0e\u76d1\u7ba1\u5668\u4e00\u6837\uff0c\u5e94\u8be5\u53ef\u4ee5\u914d\u7f6e\u6574\u5f62\u5668\u5982\u4f55\u5904\u7406\u4e0d\u5408\u683c\u7684\u6570\u636e\u5305\u3002<\/strong><\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u867d\u7136\u5927\u7f13\u51b2\u533a\u770b\u8d77\u6765\u6574\u5f62\u5668\u589e\u52a0\u4e86\u76f8\u5f53\u5927\u7684\u5ef6\u8fdf\uff0c\u4f46\u4e8b\u5b9e\u5e76\u975e\u5982\u6b64\u3002\u7ed9\u5b9a\u4e00\u4e2a\u51c6\u786e\u63cf\u8ff0\u6d41\u91cf\u7684\u6709\u6548 TSpec\uff0c\u6574\u5f62\u5c06\u5728\u6574\u5f62\u70b9\u5f15\u8d77\u5f88\u5c11\u7684\u989d\u5916\u5b9e\u9645\u5ef6\u8fdf\uff08\u5e76\u4e14\u6839\u672c\u4e0d\u4f1a\u5f71\u54cd\u5ef6\u8fdf\u754c\u9650\uff09\u3002\u6b64\u5916\uff0c\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u6574\u5f62\u4e0d\u4f1a\u5bfc\u81f4\u4efb\u4f55\u6570\u636e\u4e22\u5931\u3002<\/p>\n
\u4f46\u662f\uff0c\uff08\u901a\u5e38\u5728\u5408\u5e76\u6216\u5206\u652f\u70b9\uff09\uff0cTSpec \u53ef\u80fd\u4f1a\u5c0f\u4e8e\u5b9e\u9645\u6d41\u91cf\u3002\u5982\u679c\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\uff0c\u6574\u5f62\u5c06\u5bfc\u81f4\u5728\u6574\u5f62\u70b9\u5f62\u6210\u4e00\u4e2a\u5927\u961f\u5217\uff0c\u8fd9\u65e2\u4f1a\u5bfc\u81f4\u5927\u91cf\u989d\u5916\u7684\u5ef6\u8fdf\uff0c\u53c8\u4f1a\u8feb\u4f7f\u67d0\u4e9b\u6570\u636e\u5305\u88ab\u89c6\u4e3a\u4e0d\u5408\u683c\u3002\u8fd9\u79cd\u60c5\u51b5\u4f7f\u5f97\u4ee4\u4eba\u4e0d\u5feb\u7684\u62d2\u7edd\u670d\u52a1\u653b\u51fb\u6210\u4e3a\u53ef\u80fd\uff0c\u5176\u4e2d\u901a\u8fc7\u5c3d\u529b\u800c\u4e3a\u670d\u52a1\u6210\u529f\u63a5\u6536\u6d41\u7684\u6d41\u91cf\u7684\u63a5\u6536\u5668\u88ab\u8bf7\u6c42\u4fdd\u7559\u6d41\u7684\u65b0\u63a5\u6536\u5668\u62a2\u5360\uff0c\u4f46 TSpec \u548c RSpec \u4e0d\u8db3\u3002\u6d41\u7684\u6d41\u91cf\u73b0\u5728\u5c06\u53d7\u5230\u76d1\u7ba1\u5e76\u53ef\u80fd\u91cd\u65b0\u8c03\u6574\u3002\u5982\u679c\u9009\u62e9\u76d1\u7ba1\u529f\u80fd\u6765\u4e22\u5f03\u6570\u636e\u5305\uff0c\u5219\u5c3d\u529b\u800c\u4e3a\u7684\u63a5\u6536\u5668\u5c06\u505c\u6b62\u63a5\u6536\u6d41\u91cf\u3002\u51fa\u4e8e\u8fd9\u4e2a\u539f\u56e0\uff0c\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u76d1\u7ba1\u8005\u53ea\u662f\u5c06\u4e0d\u5408\u683c\u7684\u6570\u636e\u5305\u89c6\u4e3a\u5c3d\u529b\u800c\u4e3a\uff08\u5982\u679c\u5b9e\u65bd\u4e86\u6807\u8bb0\uff0c\u5219\u5bf9\u5176\u8fdb\u884c\u6807\u8bb0\uff09\u3002\u867d\u7136\u8fd9\u53ef\u4ee5\u9632\u6b62\u62d2\u7edd\u670d\u52a1\uff0c\u4f46\u9519\u8bef\u7684 TSpec \u4ecd\u7136\u53ef\u80fd\u5bfc\u81f4\u6392\u961f\u5ef6\u8fdf\u589e\u52a0\u3002<\/p>\n
\u6ce8\u610f\uff1a\u4e3a\u4e86\u6700\u5927\u9650\u5ea6\u5730\u51cf\u5c11\u91cd\u65b0\u6392\u5e8f\u6570\u636e\u5305\u7684\u95ee\u9898\uff0c\u5f53\u65b0\u6570\u636e\u5305\u5230\u8fbe\u5e76\u4e14\u6574\u5f62\u7f13\u51b2\u533a\u5df2\u6ee1\u65f6\uff0c\u6574\u5f62\u70b9\u53ef\u80fd\u5e0c\u671b\u4ece\u6574\u5f62\u961f\u5217\u7684\u524d\u9762\u8f6c\u53d1\u4e00\u4e2a\u5c3d\u529b\u800c\u4e3a\u7684\u6570\u636e\u5305\u3002<\/strong><\/p>\n
\u8bfb\u8005\u8fd8\u5e94\u8be5\u6ce8\u610f\u5230\uff0c\u5c06\u6570\u636e\u5305\u91cd\u65b0\u5206\u7c7b\u4e3a\u5c3d\u529b\u800c\u4e3a\uff08\u800c\u4e0d\u662f\u4e22\u5f03\u6570\u636e\u5305\uff09\u4e5f\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u652f\u6301\u5f39\u6027\u6d41\u3002\u4ed6\u4eec\u53ef\u4ee5\u4fdd\u7559\u4e00\u4e2a\u9002\u5ea6\u7684\u4ee4\u724c\u6876\uff0c\u5f53\u4ed6\u4eec\u7684\u6d41\u91cf\u8d85\u8fc7\u4ee4\u724c\u6876\u65f6\uff0c\u5c06\u5c3d\u6700\u5927\u52aa\u529b\u53d1\u9001\u591a\u4f59\u7684\u6d41\u91cf\u3002<\/p>\n
\u4e00\u4e2a\u76f8\u5173\u7684\u95ee\u9898\u662f\uff0c\u5728\u6240\u6709\u7f51\u7edc\u5143\u7d20\u4e2d\uff0c\u5927\u4e8e\u7f51\u7edc\u5143\u7d20\u7684 MTU \u7684\u6570\u636e\u5305\u5fc5\u987b\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5408\u683c\u7684\uff0c\u5e76\u4e14\u5e94\u8be5\u88ab\u5f52\u7c7b\u4e3a\u5c3d\u529b\u800c\u4e3a\uff08\u7136\u540e\u5c06\u6839\u636e\u7f51\u7edc\u5143\u7d20\u5bf9\u5c3d\u529b\u800c\u4e3a\u6d41\u91cf\u7684\u5904\u7406\u8fdb\u884c\u5206\u6bb5\u6216\u4e22\u5f03\uff09\u3002[\u518d\u4e00\u6b21\uff0c\u5982\u679c\u6807\u8bb0\u53ef\u7528\uff0c\u8fd9\u4e9b\u91cd\u65b0\u5206\u7c7b\u7684\u6570\u636e\u5305\u5e94\u8be5\u88ab\u6807\u8bb0\u3002]<\/p>\n
\n
\n
\n
<\/div><\/section>\n
8\u3001 \u6392\u5e8f\u548c\u5408\u5e76<\/strong><\/span><\/section>\n
<\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
TSpec \u662f\u6839\u636e\u4ee5\u4e0b\u89c4\u5219\u6392\u5e8f\u7684\u3002<\/p>\n
\u5982\u679c (1) TSpec A \u7684\u4ee4\u724c\u7387 r \u548c\u6876\u6df1\u5ea6 b \u90fd\u5927\u4e8e\u6216\u7b49\u4e8e TSpec B \u7684\uff0c\u5219 TSpec A \u662f TSpec B \u7684\u66ff\u4ee3\u54c1\uff08\u201c\u4e00\u6837\u597d\u6216\u66f4\u597d\u201d\uff09\uff1b(2) TSpec A \u4e2d\u7684\u5cf0\u503c\u901f\u7387 p \u81f3\u5c11\u4e0e TSpec B \u4e2d\u7684\u4e00\u6837\u5927\uff1b(3) TSpec A \u7684\u6700\u5c0f\u76d1\u7ba1\u5355\u5143 m \u81f3\u5c11\u4e0e TSpec B \u7684\u4e00\u6837\u5c0f\uff1b(4) TSpec A \u7684\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f M \u81f3\u5c11\u4e0e TSpec B \u7684\u4e00\u6837\u5927\u3002<\/p>\n
\u5982\u679c (1) TSpec A \u7684\u4ee4\u724c\u7387 r \u548c\u6876\u6df1\u5ea6 b \u90fd\u5c0f\u4e8e\u6216\u7b49\u4e8e TSpec B (2) TSpec A \u4e2d\u7684\u5cf0\u503c\u901f\u7387 p \u81f3\u5c11\u4e0e TSpec B \u4e2d\u7684\u5cf0\u503c\u901f\u7387\u4e00\u6837\u5c0f\uff1b(3) TSpec A \u7684\u6700\u5c0f\u76d1\u7ba1\u5355\u5143 m \u81f3\u5c11\u4e0e TSpec B \u7684\u4e00\u6837\u5927\uff1b(4) TSpec A \u7684\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f M \u81f3\u5c11\u4e0e TSpec B \u7684\u4e00\u6837\u5c0f\u3002<\/p>\n
\u4e00\u4e2a\u5408\u5e76\u7684 TSpec \u53ef\u4ee5\u5728\u4e00\u7ec4 TSpec \u4e0a\u8ba1\u7b97\uff0c\u91c7\u7528 (1) \u6700\u5927\u4ee4\u724c\u6876\u901f\u7387\uff0c(2) \u6700\u5927\u6876\u5927\u5c0f\uff0c(3) \u6700\u5927\u5cf0\u503c\u901f\u7387\uff0c(4) \u6700\u5c0f\u6700\u5c0f\u76d1\u7ba1\u5355\u5143\uff0c\u548c (5 ) \u96c6\u5408\u4e2d\u6240\u6709\u6210\u5458\u7684\u6700\u5c0f\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\u3002\u8fd9\u79cd\u201c\u5408\u5e76\u201d\u4e00\u8bcd\u7684\u4f7f\u7528\u7c7b\u4f3c\u4e8e RSVP \u534f\u8bae [10] \u4e2d\u7684\u4f7f\u7528\uff1b\u5408\u5e76\u7684 TSpec \u8db3\u4ee5\u63cf\u8ff0\u6765\u81ea\u4efb\u4f55\u4e00\u4e2a\u7ec4\u6210 TSpec \u7684\u6d41\u91cf\u3002<\/p>\n
\u901a\u8fc7\u8ba1\u7b97 (1) \u4ee4\u724c\u6876\u901f\u7387\u7684\u603b\u548c\uff0c(2) \u6876\u5927\u5c0f\u7684\u603b\u548c\uff0c(3) \u5cf0\u503c\u901f\u7387\u7684\u603b\u548c\uff0c(4) \u6700\u5c0f\u7684\u6700\u5c0f\u503c\uff0c\u53ef\u4ee5\u5728\u4e00\u7ec4 TSpec \u4e0a\u8ba1\u7b97\u6c42\u548c\u7684 TSpec\u76d1\u7ba1\u5355\u5143\uff0c\u4ee5\u53ca (5) \u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\u53c2\u6570\u3002<\/p>\n
\u6700\u4e0d\u5e38\u89c1\u7684 TSpec \u662f\u8db3\u4ee5\u63cf\u8ff0\u4e00\u7ec4\u6d41\u91cf\u4e2d\u4efb\u4f55\u4e00\u4e2a\u6d41\u91cf\u7684 TSpec\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u8ba1\u7b97\u5728\u4e00\u7ec4 TSpec \u4e0a\u8ba1\u7b97\u6700\u4e0d\u5e38\u89c1\u7684 TSpec\uff1a(1) \u6700\u5927\u4ee4\u724c\u6876\u901f\u7387\uff0c(2) \u6700\u5927\u6876\u5927\u5c0f\uff0c(3) \u6700\u5927\u5cf0\u503c\u901f\u7387\uff0c(4) \u6700\u5c0f\u6700\u5c0f\u76d1\u7ba1\u5355\u5143\uff0c\u4ee5\u53ca(5) \u96c6\u5408\u4e2d\u6240\u6709\u6210\u5458\u6700\u5927\u7684\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\u3002<\/p>\n
\u4e24\u4e2a TSpec \u7684\u6700\u5c0f\u503c\u6839\u636e\u662f\u5426\u53ef\u4ee5\u8ba2\u8d2d TSpec \u800c\u6709\u6240\u4e0d\u540c\u3002\u5982\u679c\u4e00\u4e2a TSpec \u5c0f\u4e8e\u53e6\u4e00\u4e2a TSpec\uff0c\u5219\u8f83\u5c0f\u7684 TSpec \u662f\u6700\u5c0f\u503c\u3002\u5426\u5219\uff0c\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a TSpec \u4e2d\u5404\u81ea\u7684\u503c\u5e76\u9009\u62e9 (1) \u8f83\u5c0f\u7684\u4ee4\u724c\u6876\u901f\u7387\uff0c(2) \u8f83\u5927\u7684\u4ee4\u724c\u6876\u5927\u5c0f (3) \u8f83\u5c0f\u7684\u5cf0\u503c\u901f\u7387\uff0c(4)\u66f4\u5c0f\u7684\u6700\u5c0f\u76d1\u7ba1\u5355\u5143\uff0c\u4ee5\u53ca (5) \u66f4\u5c0f\u7684\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\u3002<\/p>\n
RSpec \u4ee5\u4e0e TSpecs \u7c7b\u4f3c\u7684\u65b9\u5f0f\u5408\u5e76\uff0c\u5373\u901a\u8fc7\u91c7\u7528\u6700\u5927\u901f\u7387 R \u548c\u6700\u5c0f\u5f39\u6027 S \u5c06\u4e00\u7ec4 RSpecs \u5408\u5e76\u5230\u5355\u4e2a RSpec \u4e2d\u3002\u66f4\u51c6\u786e\u5730\u8bf4\uff0c\u5982\u679c\u503c RSpec A \u662f RSpec B \u7684\u66ff\u4ee3\u54c1RSpec A\u4e2d\u9884\u7559\u670d\u52a1\u901f\u7387R\u7684\u503c\u5927\u4e8e\u6216\u7b49\u4e8eRSpec B\u4e2d\u7684\u503c\uff0cRSpec A\u4e2d\u7684slack\u503cS\u5c0f\u4e8e\u6216\u7b49\u4e8eRSpec B\u4e2d\u7684\u503c\u3002<\/p>\n
\u6bcf\u4e2a\u7f51\u5143\u63a5\u6536\u4e00\u4e2a\u5f62\u5f0f\u4e3a\uff08TSpec\uff0cRSpec\uff09\u7684\u670d\u52a1\u8bf7\u6c42\uff0c\u5176\u4e2dRSpec\u7684\u5f62\u5f0f\u4e3a\uff08Rin\uff0cSin\uff09\u3002\u7f51\u7edc\u5143\u7d20\u5904\u7406\u6b64\u8bf7\u6c42\u5e76\u6267\u884c\u4ee5\u4e0b\u4e24\u79cd\u64cd\u4f5c\u4e4b\u4e00\uff1a<\/p>\n
A. \u5b83\u63a5\u53d7\u8bf7\u6c42\u5e76\u8fd4\u56de\u5f62\u5f0f\u4e3a (Rout, Sout) \u7684\u65b0 Rspec\uff1b<\/strong><\/p>\n
B. \u5b83\u62d2\u7edd\u8be5\u8bf7\u6c42\u3002<\/strong><\/p>\n
\u751f\u6210\u65b0 RSpec \u7684\u5904\u7406\u89c4\u5219\u7531\u5ef6\u8fdf\u7ea6\u675f\u63a7\u5236\uff1a<\/p>\n
\n
    \n
  • <\/li>\n<\/ul>\n
    Sout<\/span> + b\/Rout + Ctoti\/Rout <= Sin + b\/Rin + Ctoti\/Rin\uff0c<\/span><\/code><\/pre>\n<\/section>\n
    \u5176\u4e2d Ctoti \u662f\u5f53\u524d\u5143\u7d20 i \u4e0a\u6e38\u5e76\u5305\u62ec\u5f53\u524d\u5143\u7d20 i \u7684\u6240\u6709\u7f51\u7edc\u5143\u7d20\u7684\u8bef\u5dee\u9879 C \u7684\u7d2f\u79ef\u548c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u53ea\u8981\u6ee1\u8db3\u4e0a\u8ff0\u4e0d\u7b49\u5f0f\uff0c\u8be5\u5143\u7d20\u6d88\u8017 (Sin – Sout) \u7684 slack \u5e76\u4e14\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u964d\u4f4e\u5176\u9884\u7559\u6c34\u5e73\u3002Rin \u548c Rout \u4e5f\u5fc5\u987b\u6ee1\u8db3\u7ea6\u675f\uff1a<\/p>\n
    \n
      \n
    • <\/li>\n<\/ul>\n
      r<\/span> <= Rout <= Rin\u3002<\/span><\/code><\/pre>\n<\/section>\n
      \u5f53\u591a\u4e2a RSpec\uff0c\u6bcf\u4e00\u4e2a\u7684\u901f\u7387\u4e3a Rj\uff0cj=1,2…\uff0c\u8981\u5728\u4e00\u4e2a\u5206\u5272\u70b9\u5408\u5e76\u65f6\uff0cRout \u7684\u503c\u662f\u6240\u6709\u901f\u7387 Rj \u4e2d\u7684\u6700\u5927\u503c\uff0cSout \u7684\u503c\u662f\u6240\u6709\u901f\u7387\u4e2d\u7684\u6700\u5c0f\u503c\u5f39\u6027\u9879 Sj\u3002<\/p>\n
      \u6ce8\u610f\uff1a\u4e0a\u9762\u63cf\u8ff0\u7684\u5404\u79cd TSpec \u529f\u80fd\u7531\u5e0c\u671b\u7ec4\u5408 TSpec \u7684\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\u3002\u7136\u800c\uff0c\u91cd\u8981\u7684\u662f\u8981\u89c2\u5bdf\u5230\uff0c\u5b9e\u9645\u9884\u7559\u7684\u5c5e\u6027\u662f\u901a\u8fc7\u5c06 TSpec \u4e0e RSpec \u901f\u7387 (R) \u76f8\u7ed3\u5408\u6765\u786e\u5b9a\u7684\u3002<\/strong><\/p>\n
      \u7531\u4e8e\u4fdd\u8bc1\u9884\u7559\u540c\u65f6\u9700\u8981TSpec\u548cRSpec\u901f\u7387\uff0cRSVP\u4e2d\u7684\u5171\u4eab\u9884\u7559\u5b58\u5728\u4e00\u4e9b\u96be\u9898\uff0c\u7279\u522b\u662f\u5728\u4e24\u4e2a\u6216\u591a\u4e2a\u6e90\u6d41\u76f8\u9047\u7684\u60c5\u51b5\u4e0b\u3002\u5728\u6c47\u5408\u70b9\u7684\u4e0a\u6e38\uff0c\u5e0c\u671b\u51cf\u5c11 TSpec \u548c RSpec \u4ee5\u4ec5\u4f7f\u7528\u5355\u4e2a\u6e90\u6d41\u91cf\u6240\u9700\u7684\u5e26\u5bbd\u548c\u7f13\u51b2\u3002\uff08\u4e8b\u5b9e\u4e0a\uff0c\u5982\u679c\u53d1\u9001\u65b9\u901a\u8fc7\u4f4e\u5e26\u5bbd\u94fe\u8def\u8fdb\u884c\u4f20\u8f93\uff0c\u5219\u53ef\u80fd\u6709\u5fc5\u8981\uff09\u3002<\/p>\n
      \u4f46\u662f\uff0cRSpec \u7684\u901f\u7387\u88ab\u8bbe\u7f6e\u4e3a\u5b9e\u73b0\u7279\u5b9a\u7684\u5ef6\u8fdf\u9650\u5236\uff08\u5e76\u4e14\u4e0d\u4ec5\u4ec5\u662f TSpec \u7684\u51fd\u6570\uff09\uff0c\u56e0\u6b64\u66f4\u6539 RSpec \u53ef\u80fd\u4f1a\u5bfc\u81f4\u9884\u7559\u65e0\u6cd5\u6ee1\u8db3\u63a5\u6536\u5668\u7684\u5ef6\u8fdf\u8981\u6c42\u3002\u540c\u65f6\uff0c\u4e0d\u8c03\u6574 RSpec \u901f\u7387\u610f\u5473\u7740\u53ea\u8981\u7279\u5b9a\u94fe\u8def\u4e0a\u7684\u53ef\u7528\u5e26\u5bbd\u5c0f\u4e8e\u63a5\u6536\u5668\u8bf7\u6c42\u7684\u901f\u7387 R\uff0c\u4f7f\u7528\u4fdd\u8bc1\u670d\u52a1\u7684\u201c\u5171\u4eab\u201dRSVP \u9884\u7559\u5c31\u4f1a\u5931\u8d25\uff0c\u5373\u4f7f\u5e26\u5bbd\u8db3\u4ee5\u652f\u6301\u53d1\u4ef6\u4eba\u5b9e\u9645\u4f7f\u7528\u8be5\u94fe\u63a5\u3002\u76ee\u524d\uff0c\u6b64\u9650\u5236\u5728\u4f7f\u7528 RSVP \u4fdd\u8bc1\u670d\u52a1\u65f6\u662f\u4e00\u4e2a\u672a\u89e3\u51b3\u7684\u95ee\u9898\u3002<\/p>\n
      \n
      \n
      \n
      <\/div><\/section>\n
      9\u3001 \u5b9e\u65bd\u8005\u6307\u5357<\/strong><\/span><\/section>\n
      <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
      \u672c\u8282\u4e0d\u6309\u7279\u5b9a\u987a\u5e8f\u8ba8\u8bba\u4e00\u4e9b\u91cd\u8981\u7684\u5b9e\u73b0\u95ee\u9898\u3002<\/p>\n
      \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5355\u4e2a\u5b50\u7f51\u662f\u7f51\u7edc\u5143\u7d20\uff0c\u8def\u7531\u5668\u548c\u5b50\u7f51\u90fd\u5fc5\u987b\u652f\u6301\u4fdd\u8bc1\u670d\u52a1\u6a21\u578b\u624d\u80fd\u5b9e\u73b0\u4fdd\u8bc1\u670d\u52a1\u3002\u7531\u4e8e\u5b50\u7f51\u901a\u5e38\u4e0d\u80fd\u4f7f\u7528\u57fa\u4e8e IP \u7684\u534f\u8bae\u534f\u5546\u670d\u52a1\uff0c\u4f5c\u4e3a\u63d0\u4f9b\u6709\u4fdd\u969c\u670d\u52a1\u7684\u4e00\u90e8\u5206\uff0c\u8def\u7531\u5668\u5fc5\u987b\u5145\u5f53\u5b83\u4eec\u6240\u8fde\u63a5\u7684\u5b50\u7f51\u7684\u4ee3\u7406\u3002<\/p>\n
      \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u79cd\u4ee3\u7406\u670d\u52a1\u4f1a\u5f88\u5bb9\u6613\u3002\u4f8b\u5982\uff0c\u5728\u4e0a\u6e38\u8282\u70b9\u4e0a\u7531 WFQ \u8c03\u5ea6\u5668\u7ba1\u7406\u7684\u79df\u7528\u7ebf\u8def\u4e0a\uff0cproxy \u53ea\u9700\u4fdd\u8bc1\u6240\u6709\u6d41\u7684 RSpec \u901f\u7387\u4e4b\u548c\u4e0d\u8d85\u8fc7\u7ebf\u8def\u7684\u5e26\u5bbd\uff0c\u5e76\u4e14\u9700\u8981\u901a\u544a\u57fa\u4e8e\u901f\u7387\u7684\u548c\u975e\u94fe\u8def\u7684\u57fa\u4e8e\u901f\u7387\u7684\u5ef6\u8fdf\uff0c\u4f5c\u4e3a C \u548c D \u7684\u503c\u3002<\/p>\n
      \u5728\u5176\u4ed6\u60c5\u51b5\u4e0b\uff0c\u6b64\u4ee3\u7406\u670d\u52a1\u4f1a\u5f88\u590d\u6742\u3002\u4f8b\u5982\uff0c\u5728 ATM \u7f51\u7edc\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u4e3a\u6d41\u5efa\u7acb\u4e00\u4e2a ATM VC \u5e76\u8ba1\u7b97\u8be5 VC \u7684 C \u548c D \u9879\u3002\u8bfb\u8005\u53ef\u80fd\u4f1a\u89c2\u5bdf\u5230\uff0c\u4fdd\u8bc1\u670d\u52a1\u4f7f\u7528\u7684\u4ee4\u724c\u6876\u548c\u5cf0\u503c\u901f\u7387\u76f4\u63a5\u6620\u5c04\u5230 ATM \u53ef\u53d8\u6bd4\u7279\u7387\u6d41\u91cf\u7684 Q.2931 QoS \u53c2\u6570\u7684\u6301\u7eed\u4fe1\u5143\u901f\u7387\u3001\u7a81\u53d1\u5927\u5c0f\u548c\u5cf0\u503c\u4fe1\u5143\u901f\u7387\u3002<\/p>\n
      \u6570\u636e\u5305\u4e0d\u4f1a\u4e22\u5931\u7684\u4fdd\u8bc1\u662f\u901a\u8fc7\u5c06\u8def\u7531\u5668\u7f13\u51b2\u533a\u7a7a\u95f4 B \u8bbe\u7f6e\u4e3a\u7b49\u4e8e\u4ee4\u724c\u6876 b \u52a0\u4e0a\u4e00\u4e9b\u9519\u8bef\u9879\uff08\u5982\u4e0b\u6240\u8ff0\uff09\u6765\u83b7\u5f97\u7684\u3002<\/p>\n
      \u4e0e\u5b50\u7f51\u76f8\u5173\u7684\u53e6\u4e00\u4e2a\u95ee\u9898\u662f TSpec \u7684\u4ee4\u724c\u6876\u901f\u7387\u6d4b\u91cf IP \u6d41\u91cf\uff0c\u5e76\u4e14\u4e0d\uff08\u4e5f\u4e0d\u80fd\uff09\u8003\u8651\u94fe\u63a5\u7ea7\u522b\u7684\u6807\u5934\u3002\u56e0\u6b64\u5b50\u7f51\u7f51\u7edc\u5143\u7d20\u5fc5\u987b\u8c03\u6574\u901f\u7387\u548c\u53ef\u80fd\u7684\u5b58\u50a8\u6876\u5927\u5c0f\u4ee5\u8003\u8651\u6dfb\u52a0\u94fe\u8def\u7ea7\u6807\u5934\u3002\u96a7\u9053\u8fd8\u5fc5\u987b\u8003\u8651\u5b83\u4eec\u6dfb\u52a0\u7684\u989d\u5916 IP \u6807\u5934\u3002<\/p>\n
      \u5bf9\u4e8e\u6570\u636e\u5305\u7f51\u7edc\uff0c\u901a\u5e38\u53ef\u4ee5\u901a\u8fc7\u5c06\u901f\u7387\u548c\u6876\u5927\u5c0f\u9664\u4ee5\u6700\u5c0f\u76d1\u7ba1\u5355\u5143\u6765\u8ba1\u7b97\u6700\u5927\u62a5\u5934\u901f\u7387\u3002\u5bf9\u4e8e\u8fdb\u884c\u5185\u90e8\u5206\u6bb5\u7684\u7f51\u7edc\uff0c\u4f8b\u5982 ATM\uff0c\u8ba1\u7b97\u53ef\u80fd\u66f4\u590d\u6742\uff0c\u56e0\u4e3a\u5fc5\u987b\u8003\u8651\u6bcf\u4e2a\u5206\u6bb5\u7684\u5f00\u9500\u548c\u7531\u4e8e\u6570\u636e\u5305\u5927\u5c0f\u548c\u5206\u6bb5\u5927\u5c0f\u4e4b\u95f4\u7684\u4e0d\u5339\u914d\u800c\u5bfc\u81f4\u7684\u4efb\u4f55\u6d6a\u8d39\uff08\u4f20\u8f93\u7684\u586b\u5145\u5b57\u8282\uff09\u3002\u4f8b\u5982\uff0c\u7531 ATM AAL5 \u52a0\u4e0a ATM \u5206\u6bb5\u548c\u91cd\u7ec4\u5f3a\u52a0\u7684\u989d\u5916\u6570\u636e\u901f\u7387\u7684\u4fdd\u5b88\u4f30\u8ba1\u662f<\/p>\n
      \n
        \n
      • <\/li>\n<\/ul>\n
        ((r\/48)*5)+((r\/m)*<\/span>(8+52))<\/span><\/code><\/pre>\n<\/section>\n
        \u5b83\u8868\u793a\u5212\u5206\u4e3a 48 \u5b57\u8282\u4fe1\u5143\u7684\u901f\u7387\u4e58\u4ee5 5 \u5b57\u8282 ATM \u62a5\u5934\uff0c\u52a0\u4e0a\u6700\u5927\u6570\u636e\u5305\u901f\u7387 (r\/m) \u4e58\u4ee5 8 \u5b57\u8282 AAL5 \u62a5\u5934\u7684\u6210\u672c\u52a0\u4e0a ATM \u53ef\u4ee5\u6d6a\u8d39\u7684\u6700\u5927\u7a7a\u95f4\u6570\u636e\u5305\u7684\u5206\u6bb5\uff08\u8fd9\u662f\u5728\u4e00\u4e2a\u5305\u542b\u4e00\u4e2a\u5b57\u8282\u7684\u5355\u5143\u4e2d\u6d6a\u8d39\u7684 52 \u4e2a\u5b57\u8282\uff09\u3002\u4f46\u662f\u8fd9\u4e2a\u4f30\u8ba1\u53ef\u80fd\u975e\u5e38\u9ad8\uff0c\u7279\u522b\u662f\u5982\u679c m \u5f88\u5c0f\uff0c\u56e0\u4e3a ATM \u6d6a\u8d39\u901a\u5e38\u8fdc\u5c0f\u4e8e 52 \u5b57\u8282\u3002\uff08\u5e94\u8be5\u8b66\u544a ATM \u5b9e\u73b0\u8005\uff0c\u5728\u4e3a\u547c\u53eb\u5efa\u7acb\u8bbe\u7f6e VC \u53c2\u6570\u65f6\uff0c\u4ee4\u724c\u6876\u4e5f\u53ef\u80fd\u5fc5\u987b\u8fdb\u884c\u7f29\u653e\uff0c\u5e76\u4e14\u8be5\u793a\u4f8b\u4e0d\u8003\u8651\u8bf8\u5982 RFC 1483 \u4e2d\u6307\u5b9a\u7684\u5c01\u88c5\u6240\u4ea7\u751f\u7684\u5f00\u9500\uff09\u3002<\/p>\n
        \u4e3a\u4e86\u786e\u4fdd\u4e0d\u4e22\u5931\uff0c\u7f51\u7edc\u5143\u7d20\u5fc5\u987b\u4e3a\u7a81\u53d1\u5206\u914d\u4e00\u4e9b\u7f13\u51b2\u3002\u5982\u679c\u6bcf\u4e00\u8df3\u90fd\u5b8c\u7f8e\u5730\u5b9e\u73b0\u4e86\u6d41\u4f53\u6a21\u578b\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7f13\u51b2\u5c31\u662f b\uff08\u4ee4\u724c\u6876\u5927\u5c0f\uff09\u3002\u7136\u800c\uff0c\u6b63\u5982\u524d\u9762\u5173\u4e8e\u6574\u5f62\u7684\u8ba8\u8bba\u4e2d\u6240\u6307\u51fa\u7684\uff0c\u5b9e\u73b0\u662f\u8fd1\u4f3c\u503c\uff0c\u6211\u4eec\u9884\u8ba1\u6d41\u91cf\u5728\u901a\u8fc7\u7f51\u7edc\u65f6\u4f1a\u53d8\u5f97\u66f4\u52a0\u7a81\u53d1\u3002\u7136\u800c\uff0c\u4e0e\u6574\u5f62\u4e00\u6837\uff0c\u5904\u7406\u7a81\u53d1\u6027\u6240\u9700\u7684\u7f13\u51b2\u91cf\u53d7 b+Csum+Dsum*R \u7684\u9650\u5236\u3002\u5982\u679c\u8003\u8651\u5230\u5cf0\u503c\u901f\u7387\uff0c\u5219\u53ef\u4ee5\u8fdb\u4e00\u6b65\u964d\u4f4e\u5230<\/p>\n
        \n
          \n
        • <\/li>\n<\/ul>\n
          M<\/span> + (b-M)(p-X)\/(p-r) + (Csum\/R + Dsum)X<\/span><\/code><\/pre>\n<\/section>\n
          \u5176\u4e2d\uff0c\u5982\u679c (b-M)\/(p-r) \u5c0f\u4e8e Csum\/R+Dsum\uff0c\u5219 X \u8bbe\u7f6e\u4e3a r\uff0c\u5982\u679c (b-M)\/(p-r) \u5927\u4e8e\u6216\u7b49\u4e8e Csum\/R+Dsum \u4e14 p>R\uff0c\u5219 X \u4e3a R\uff1b\u5426\u5219\uff0cX \u8bbe\u7f6e\u4e3a p\u3002\u8fd9\u79cd\u51cf\u5c11\u662f\u56e0\u4e3a\u5cf0\u503c\u901f\u7387\u9650\u5236\u4e86\u7a81\u53d1 b \u53ef\u4ee5\u653e\u7f6e\u5728\u7f51\u7edc\u4e2d\u7684\u901f\u7387\u3002\u76f8\u53cd\uff0c\u5982\u679c\u7f51\u7edc\u5143\u7d20\u8fd4\u56de\u975e\u96f6\u5f39\u6027\u9879 Sout\uff0c\u5219\u901a\u8fc7\u5c06 Sout \u6dfb\u52a0\u5230 Dsum \u6765\u589e\u52a0\u7f13\u51b2\u533a\u9700\u6c42\u3002<\/p>\n
          \u867d\u7136\u9f13\u52b1\u53d1\u9001\u5e94\u7528\u7a0b\u5e8f\u8bbe\u7f6e\u5cf0\u503c\u901f\u7387\u53c2\u6570\u5e76\u4e14\u9700\u8981\u6574\u5f62\u70b9\u4ee5\u7b26\u5408\u5b83\uff0c\u4f46\u51fa\u4e8e\u8ba1\u7b97\u7f13\u51b2\u533a\u9700\u6c42\u548c\u7aef\u5230\u7aef\u5ef6\u8fdf\u7684\u76ee\u7684\u5ffd\u7565\u5cf0\u503c\u901f\u7387\u603b\u662f\u53ef\u4ee5\u63a5\u53d7\u7684\u3002\u7ed3\u679c\u53ea\u662f\u9ad8\u4f30\u4e86\u7f13\u51b2\u548c\u5ef6\u8fdf\u3002\u5982\u4e0a\u6240\u8ff0\uff0c\u5982\u679c\u5cf0\u503c\u901f\u7387\u672a\u77e5\uff08\u56e0\u6b64\u53ef\u80fd\u65e0\u9650\uff09\uff0c\u5219\u6240\u9700\u7684\u7f13\u51b2\u4e3a b+Csum+Dsum*R\u3002\u6ca1\u6709\u5cf0\u503c\u901f\u7387\u7684\u7aef\u5230\u7aef\u5ef6\u8fdf\u4e3a b\/R+Ctot\/R+Dtot\u3002<\/p>\n
          \u6bcf\u4e2a\u7f51\u7edc\u5143\u7d20\u7684\u53c2\u6570 D \u5e94\u8be5\u8bbe\u7f6e\u4e3a\u901a\u8fc7\u7f51\u7edc\u5143\u7d20\u7684\u6700\u5927\u6570\u636e\u5305\u4f20\u8f93\u5ef6\u8fdf\u53d8\u5316\uff08\u4e0e\u901f\u7387\u548c\u6876\u5927\u5c0f\u65e0\u5173\uff09\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u4e2a\u7b80\u5355\u7684\u8def\u7531\u5668\u4e2d\uff0c\u53ef\u4ee5\u8ba1\u7b97\u6570\u636e\u5305\u901a\u8fc7\u8f93\u5165\u63a5\u53e3\u5230\u8fbe\u5904\u7406\u5668\u6240\u9700\u7684\u6700\u574f\u60c5\u51b5\u548c\u6700\u4f73\u60c5\u51b5\u65f6\u95f4\u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u53ef\u80fd\u53d1\u751f\u7684\u4efb\u4f55\u53d8\u5316\u4e2d\u91c7\u53d6\u4ece\u5904\u7406\u5668\u5230\u51fa\u7ad9\u94fe\u8def\u8c03\u5ea6\u7a0b\u5e8f\uff08\u5047\u8bbe\u6392\u961f\u65b9\u6848\u6b63\u5e38\u5de5\u4f5c\uff09\u3002<\/p>\n
          \u5bf9\u4e8e\u6570\u636e\u5305\u73af\u5883\u4e2d\u7684\u52a0\u6743\u516c\u5e73\u6392\u961f\uff0cD \u8bbe\u7f6e\u4e3a\u94fe\u8def MTU \u9664\u4ee5\u94fe\u8def\u5e26\u5bbd\uff0c\u4ee5\u8003\u8651\u6570\u636e\u5305\u5728\u6700\u5927\u5927\u5c0f\u7684\u6570\u636e\u5305\u5f00\u59cb\u4f20\u8f93\u65f6\u5230\u8fbe\u7684\u53ef\u80fd\u6027\uff0c\u5e76\u4e14\u5230\u8fbe\u7684\u6570\u636e\u5305\u5e94\u8be5\u5177\u6709\u5728\u6700\u5927\u5927\u5c0f\u7684\u6570\u636e\u5305\u4e4b\u524d\u79bb\u5f00\u3002\u5bf9\u4e8e\u57fa\u4e8e\u5e27\u7684\u65f6\u9699\u7cfb\u7edf\uff08\u4f8b\u5982 Stop and Go \u961f\u5217\uff09\uff0cD \u662f\u6570\u636e\u5305\u5728\u83b7\u5f97\u4f20\u8f93\u673a\u4f1a\u4e4b\u524d\u53ef\u80fd\u5fc5\u987b\u7b49\u5f85\u7684\u6700\u5927\u65f6\u9699\u6570\u3002<\/p>\n
          \u8bf7\u6ce8\u610f\uff0c\u591a\u64ad\u53ef\u80fd\u4f1a\u4f7f\u786e\u5b9a D \u53d8\u5f97\u66f4\u52a0\u56f0\u96be\u3002\u5728\u8bb8\u591a\u5b50\u7f51\u4e2d\uff0c\u4f8b\u5982 ATM\uff0c\u5b50\u7f51\u7684\u5c5e\u6027\u53ef\u80fd\u53d6\u51b3\u4e8e\u4ece\u591a\u64ad\u53d1\u9001\u65b9\u5230\u63a5\u6536\u65b9\u7684\u8def\u5f84\u3002\u6709\u8bb8\u591a\u53ef\u80fd\u7684\u65b9\u6cd5\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u4e00\u79cd\u662f\u4e3a\u6574\u4e2a\u5b50\u7f51\u9009\u62e9\u4e00\u4e2a\u6709\u4ee3\u8868\u6027\u7684\u5ef6\u8fdf\uff0c\u5e76\u5c06 D \u8bbe\u7f6e\u4e3a\u4e0e\u8be5\u5ef6\u8fdf\u7684\uff08\u975e\u8d1f\uff09\u5dee\u5f02\u3002\u53e6\u4e00\u4e2a\u662f\u4f30\u8ba1\u5b50\u7f51\u51fa\u53e3\u70b9\u7684\u5b50\u7f51\u5c5e\u6027\uff0c\u56e0\u4e3a\u51fa\u53e3\u70b9\u53ef\u80fd\u6700\u9002\u5408\u8ba1\u7b97\u5176\u4ece\u6e90\u5934\u5f00\u59cb\u7684\u8def\u5f84\u7684\u5c5e\u6027\u3002<\/p>\n
          \u6ce8\u610f\uff1a\u91cd\u8981\u7684\u662f\u8981\u6ce8\u610f\uff0c\u5173\u4e8e\u5b50\u7f51\u5982\u4f55\u786e\u5b9a\u5176\u5c5e\u6027\u5e76\u6ca1\u6709\u56fa\u5b9a\u7684\u89c4\u5219\u96c6\uff0c\u5e76\u4e14\u6bcf\u79cd\u5b50\u7f51\u6280\u672f\u90fd\u5fc5\u987b\u5f00\u53d1\u81ea\u5df1\u7684\u4e00\u7ec4\u7a0b\u5e8f\u6765\u51c6\u786e\u8ba1\u7b97 C \u548c D \u4ee5\u53ca\u5f39\u6027\u503c\u3002<\/strong><\/p>\n
          D \u65e8\u5728\u533a\u522b\u4e8e\u901a\u8fc7\u7f51\u7edc\u5143\u7d20\u7684\u5ef6\u8fdf\u3002\u5ef6\u8fdf\u662f\u901a\u8fc7\u8bbe\u5907\u7684\u6700\u77ed\u65f6\u95f4\uff08\u5149\u7ea4\u4e2d\u7684\u5149\u901f\u5ef6\u8fdf\u6216\u5c06\u6570\u636e\u5305\u901a\u8fc7\u8def\u7531\u5668\u6240\u9700\u7684\u7edd\u5bf9\u6700\u77ed\u65f6\u95f4\uff09\uff0c\u800c\u53c2\u6570 D \u65e8\u5728\u9650\u5236\u975e\u57fa\u4e8e\u901f\u7387\u7684\u5ef6\u8fdf\u7684\u53ef\u53d8\u6027\u3002\u5728\u5b9e\u8df5\u4e2d\uff0c\u8fd9\u79cd\u533a\u522b\u6709\u65f6\u662f\u4efb\u610f\u7684\uff08\u5ef6\u8fdf\u53ef\u80fd\u5f88\u5c0f\uff09\u2014\u2014\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5c06\u5ef6\u8fdf\u4e0e D \u7ed3\u5408\u8d77\u6765\u5e76\u5c06\u4efb\u4f55\u5ef6\u8fdf\u5ba3\u4f20\u4e3a\u96f6\u662f\u5b8c\u5168\u5408\u7406\u7684\u3002<\/p>\n
          \u6ce8\u610f\uff1a\u5728\u8fd9\u4e2a\u65b9\u6848\u4e2d\uff0c\u4e3a\u4e86\u5b8c\u5168\u4fdd\u8bc1\u4e00\u4e2a\u6570\u636e\u5305\u53ef\u80fd\u7ecf\u5386\u7684\u6700\u5927\u5ef6\u8fdf\uff0c\u8fd9\u4e2a\u670d\u52a1\u7684\u7528\u6237\u9700\u8981\u77e5\u9053\u6392\u961f\u5ef6\u8fdf\uff08\u7531 C \u548c D \u63d0\u4f9b\uff09\u548c\u5ef6\u8fdf\u3002\u8be5\u670d\u52a1\u4e0d\u901a\u544a\u5ef6\u8fdf\uff0c\u4f46\u5b83\u662f\u4e00\u4e2a\u901a\u7528\u7279\u5f81\u53c2\u6570\uff08\u5982 [8] \u4e2d\u6307\u5b9a\u7684\u90a3\u6837\u901a\u544a\uff09\u3002<\/strong><\/p>\n
          \u4f46\u662f\uff0c\u5373\u4f7f\u6ca1\u6709\u516c\u5e03\u5ef6\u8fdf\uff0c\u4ecd\u7136\u53ef\u4ee5\u4f7f\u7528\u6b64\u670d\u52a1\u3002\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u6d4b\u91cf\u63a5\u6536\u5230\u7684\u7b2c\u4e00\u4e2a\u6570\u636e\u5305\u6240\u7ecf\u5386\u7684\u5ef6\u8fdf\uff08\u6216\u524d\u51e0\u4e2a\u6570\u636e\u5305\u7684\u6700\u5c0f\u5ef6\u8fdf\uff09\uff0c\u5e76\u5c06\u6b64\u5ef6\u8fdf\u503c\u89c6\u4e3a\u5ef6\u8fdf\u7684\u4e0a\u9650\u3002<\/p>\n
          \u53c2\u6570 C \u662f\u7531\u4e8e\u7279\u5b9a\u5b9e\u73b0\u5982\u4f55\u504f\u79bb\u4e25\u683c\u7684\u9010\u4f4d\u670d\u52a1\u7684\u53d8\u5e7b\u83ab\u6d4b\u800c\u5bfc\u81f4\u7684\u6570\u636e\u79ef\u538b\u3002\u56e0\u6b64\uff0c\u4f8b\u5982\uff0c\u5bf9\u4e8e\u6570\u636e\u5305\u5316\u52a0\u6743\u516c\u5e73\u961f\u5217\uff0cC \u8bbe\u7f6e\u4e3a M \u4ee5\u8003\u8651\u5206\u7ec4\u5316\u6548\u679c\u3002<\/p>\n
          \u5982\u679c\u7f51\u7edc\u5143\u7d20\u4f7f\u7528\u4e00\u5b9a\u91cf\u7684\u5f39\u6027 Si \u6765\u51cf\u5c11\u5b83\u4e3a\u7279\u5b9a\u6d41 i \u4fdd\u7559\u7684\u8d44\u6e90\u91cf\uff0c\u5219\u503c Si \u5e94\u8be5\u5b58\u50a8\u5728\u7f51\u7edc\u5143\u7d20\u4e2d\u3002\u968f\u540e\uff0c\u5982\u679c\u63a5\u6536\u5230\u6d41 i \u7684\u4fdd\u7559\u5237\u65b0\uff0c\u5219\u7f51\u7edc\u5143\u7d20\u5fc5\u987b\u4f7f\u7528\u76f8\u540c\u7684\u5f39\u6027 Si \u800c\u65e0\u9700\u4efb\u4f55\u8fdb\u4e00\u6b65\u7684\u8ba1\u7b97\u3002\u8fd9\u4fdd\u8bc1\u4e86\u9884\u8ba2\u8fc7\u7a0b\u7684\u4e00\u81f4\u6027\u3002<\/p>\n
          \u4f5c\u4e3a\u4f7f\u7528\u5f39\u6027\u9879\u7684\u793a\u4f8b\uff0c\u8003\u8651\u6240\u9700\u7684\u7aef\u5230\u7aef\u5ef6\u8fdf Dreq \u5927\u4e8e\u6d41\u4f53\u6d41\u52a8\u7cfb\u7edf\u7684\u6700\u5927\u5ef6\u8fdf\u7684\u60c5\u51b5\u3002\u540e\u8005\u901a\u8fc7\u5728\u6d41\u4f53\u5ef6\u8fdf\u516c\u5f0f\u4e2d\u8bbe\u7f6e R=r \u5f97\u5230\uff08\u4e3a\u4e86\u7a33\u5b9a\uff0cR>=r \u5fc5\u987b\u4e3a\u771f\uff09\uff0c\u7531\u4e0b\u5f0f\u7ed9\u51fa<\/p>\n
          \n
          b\/r + Ctot\/r + Dtot\u3002<\/pre>\n<\/section>\n
          \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5f39\u6027\u9879\u662f<\/p>\n
          \n
          S = Dreq - (b\/r + Ctot\/r + Dtot)\u3002<\/pre>\n<\/section>\n
          \u7f51\u7edc\u5143\u7d20\u53ef\u4ee5\u4f7f\u7528\u5f39\u6027\u9879\u6765\u8c03\u6574\u5b83\u4eec\u7684\u672c\u5730\u4fdd\u7559\uff0c\u4ee5\u4fbf\u5b83\u4eec\u53ef\u4ee5\u63a5\u7eb3\u5426\u5219\u4f1a\u88ab\u62d2\u7edd\u7684\u6d41\u3002\u53ef\u4ee5\u5728\u5185\u90e8\u533a\u5206\u5ef6\u8fdf\u548c\u901f\u7387\u4fdd\u8bc1\u7684\u4e2d\u95f4\u7f51\u7edc\u5143\u7d20\u5904\u7684\u7f51\u7edc\u5143\u7d20\u73b0\u5728\u53ef\u4ee5\u5229\u7528\u8be5\u4fe1\u606f\u6765\u964d\u4f4e\u5206\u914d\u7ed9\u8be5\u6d41\u7684\u8d44\u6e90\u91cf\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u91c7\u7528\u4e00\u5b9a\u6570\u91cf\u7684 slack s <= S\uff0cRCSD \u8c03\u5ea6\u5668 [5] \u53ef\u4ee5\u5c06\u5206\u914d\u7ed9\u6d41\u7684\u672c\u5730\u5ef6\u8fdf\u754c\u9650 d \u589e\u52a0\u5230 d+s\u3002\u7ed9\u5b9a\u4e00\u4e2a RSpec\uff0c(Rin, Sin)\uff0c\u5b83\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e Rout = Rin \u548c Sout = Sin – s \u6765\u5b9e\u73b0\u3002<\/p>\n
          \u7c7b\u4f3c\u5730\uff0c\u4f7f\u7528 WFQ \u8c03\u5ea6\u5668\u7684\u7f51\u7edc\u5143\u7d20\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 RSpec \u4e2d\u7684\u4e00\u4e9b\u5f39\u6027\u6765\u51cf\u5c11\u5176\u4ece Rin \u5230 Rout \u7684\u672c\u5730\u9884\u7559\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u4e0a\u4e00\u8282\u4e2d\u7ed9\u51fa\u7684\u8f6c\u6362\u89c4\u5219\u6765\u5b8c\u6210\uff0c\u786e\u4fdd\u51cf\u5c11\u7684\u9884\u7559\u7ea7\u522b\u4e0d\u4f1a\u589e\u52a0\u6574\u4f53\u7aef\u5230\u7aef\u5ef6\u8fdf\u3002<\/p>\n
          \n
          \n
          \n
          <\/div><\/section>\n
          10\u3001 \u8bc4\u4f30\u6807\u51c6<\/strong><\/span><\/section>\n
          <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
          \u5f53\u6e90\u7684\u6d41\u91cf\u7b26\u5408 TSpec \u65f6\uff0c\u5143\u7d20\u7684\u8c03\u5ea6\u7b97\u6cd5\u548c\u51c6\u5165\u63a7\u5236\u7b97\u6cd5\u5fc5\u987b\u786e\u4fdd\u6c38\u8fdc\u4e0d\u4f1a\u8fdd\u53cd\u5ef6\u8fdf\u754c\u9650\u5e76\u4e14\u4e0d\u4f1a\u4e22\u5931\u6570\u636e\u5305\u3002\u6b64\u5916\uff0c\u8be5\u5143\u7d20\u5fc5\u987b\u786e\u4fdd\u884c\u4e3a\u4e0d\u7aef\u7684\u6d41\u4e0d\u4f1a\u5f71\u54cd\u63d0\u4f9b\u7ed9\u5176\u4ed6\u6d41\u7684\u670d\u52a1\u3002\u9f13\u52b1\u4f9b\u5e94\u5546\u6b63\u5f0f\u8bc1\u660e\u4ed6\u4eec\u7684\u5b9e\u73b0\u662f\u6d41\u4f53\u6a21\u578b\u7684\u8fd1\u4f3c\u3002<\/p>\n
          \n
          \n
          \n
          <\/div><\/section>\n
          11\u3001 \u5b9e\u65bd\u793a\u4f8b<\/strong><\/span><\/section>\n
          <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
          \u5b58\u5728\u51e0\u79cd\u8fd1\u4f3c\u6d41\u4f53\u6a21\u578b\u7684\u7b97\u6cd5\u548c\u5b9e\u73b0\u3002\u5b83\u4eec\u5305\u62ec\u52a0\u6743\u516c\u5e73\u961f\u5217 (Weighted Fair Queueing\uff0cWFQ) [2]\u3001Jitter-EDD [3]\u3001\u865a\u62df\u65f6\u949f [4] \u548c IBM [5] \u63d0\u51fa\u7684\u65b9\u6848\u3002\u4e00\u4e2a\u5f88\u597d\u7684\u7406\u8bba\u5c55\u793a\u8868\u660e\u8fd9\u4e9b\u65b9\u6848\u662f\u4e00\u5927\u7c7b\u7b97\u6cd5\u7684\u4e00\u90e8\u5206\uff0c\u53ef\u4ee5\u5728 [6] \u4e2d\u627e\u5230\u3002<\/p>\n
          \n
          \n
          \n
          <\/div><\/section>\n
          12\u3001 \u4f7f\u7528\u793a\u4f8b<\/strong><\/span><\/section>\n
          <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
          \u8003\u8651\u4e00\u4e2a\u4e0d\u80fd\u5bb9\u5fcd\u4efb\u4f55\u4e22\u5931\u6216\u5ef6\u8fdf\u6570\u636e\u5305\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u5b83\u4f7f\u7528\u901a\u544a\u7684\u503c Ctot \u548c Dtot \u4ee5\u53ca\u6d41\u7684 TSpec \u6765\u8ba1\u7b97\u901f\u7387\u4e3a R \u7684\u670d\u52a1\u8bf7\u6c42\u4ea7\u751f\u7684\u5ef6\u8fdf\u754c\u9650\u3002\u5047\u8bbe R < p\uff0c\u7136\u540e\u5c06\u5176\u56de\u653e\u70b9\u8bbe\u7f6e\u4e3a [(bM)\/R*(pR )\/(pr)]+(M+Ctot)\/R+Dtot\u3002<\/p>\n
          \n
          \n
          \n
          <\/div><\/section>\n
          13\u3001 \u5b89\u5168\u6ce8\u610f\u4e8b\u9879<\/strong><\/span><\/section>\n
          <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
          \u672c\u5907\u5fd8\u5f55\u8ba8\u8bba\u4e86\u5982\u4f55\u6ee5\u7528\u6b64\u670d\u52a1\u6765\u5141\u8bb8\u62d2\u7edd\u670d\u52a1\u653b\u51fb\u3002\u5b9a\u4e49\u7684\u670d\u52a1\u4e0d\u5141\u8bb8\u62d2\u7edd\u670d\u52a1\uff08\u5c3d\u7ba1\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u670d\u52a1\u53ef\u80fd\u4f1a\u964d\u7ea7\uff09\u3002<\/p>\n
          \n
          \n
          \n
          <\/div><\/section>\n
          \u9644\u5f55 1\uff1a\u901a\u8fc7 RSVP \u4f7f\u7528\u4fdd\u8bc1\u670d\u52a1<\/strong><\/span><\/section>\n
          <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
          \u53c2\u8003\u6587\u732e [9] \u4e2d\u8be6\u7ec6\u8bf4\u660e\u4e86\u4fdd\u8bc1\u670d\u52a1\u4e0e RSVP \u8d44\u6e90\u9884\u7559\u8bbe\u7f6e\u534f\u8bae\u7684\u7ed3\u5408\u4f7f\u7528\u3002\u672c\u6587\u6863\u63d0\u4f9b\u4e86\u652f\u6301\u9700\u8981\u4fdd\u8bc1\u670d\u52a1\u7684\u5e94\u7528\u7a0b\u5e8f\u6240\u9700\u7684 RSVP FLOWSPEC\u3001SENDER_TSPEC \u548c ADSPEC \u5bf9\u8c61\u7684\u683c\u5f0f\uff0c\u5e76\u63d0\u4f9b\u4e86\u6709\u5173 RSVP \u5982\u4f55\u5904\u7406\u8fd9\u4e9b\u5bf9\u8c61\u7684\u4fe1\u606f\u3002RSVP \u534f\u8bae\u672c\u8eab\u5728\u53c2\u8003\u6587\u732e [10] \u4e2d\u6709\u8be6\u7ec6\u8bf4\u660e\u3002<\/p>\n
          \n
          \n
          \n
          <\/div><\/section>\n
          \u53c2\u8003<\/strong><\/span><\/section>\n
          <\/div><\/section>\n<\/section>\n<\/section>\n<\/section>\n
          \n
          [1] Shenker, S., and J. Wroclawski, \"Network Element Service Specification Template\", RFC 2216, September 1997.[2] A. Demers, S. Keshav and S. Shenker, \"Analysis and Simulation of a Fair Queueing Algorithm,\" in Internetworking: Research and Experience, Vol 1, No. 1., pp. 3-26.[3] L. Zhang, \"Virtual Clock: A New Traffic Control Algorithm for Packet Switching Networks,\" in Proc. ACM SIGCOMM '90, pp. 19-29.[4] D. Verma, H. Zhang, and D. Ferrari, \"Guaranteeing Delay Jitter Bounds in Packet Switching Networks,\" in Proc. Tricomm '91.[5] L. Georgiadis, R. Guerin, V. Peris, and K. N. Sivarajan, \"Efficient Network QoS Provisioning Based on per Node Traffic Shaping,\" IBM Research Report No. RC-20064.[6] P. Goyal, S.S. Lam and H.M. Vin, \"Determining End-to-End Delay Bounds in Heterogeneous Networks,\" in Proc. 5th Intl. Workshop on Network and Operating System Support for Digital Audio and Video, April 1995.[7] A.K.J. Parekh, A Generalized Processor Sharing Approach to Flow Control in Integrated Services Networks, MIT Laboratory for Information and Decision Systems, Report LIDS-TH-2089, February 1992.[8] Shenker, S., and J. Wroclawski, \"General Characterization Parameters for Integrated Service Network Elements\", RFC 2215, September 1997.[9] Wroclawski, J., \"Use of RSVP with IETF Integrated Services\", RFC 2210, September 1997.[10] Braden, R., Ed., et. al., \"Resource Reservation Protocol (RSVP) - Version 1 Functional Specification\", RFC 2205, September 1997.<\/pre>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
          \u200d\u200d RFC2212\uff1aSpecification of Guaranteed Quality of Servi […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,2],"tags":[],"class_list":["post-6604","post","type-post","status-publish","format-standard","hentry","category-cisco","category-network"],"_links":{"self":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/6604","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6604"}],"version-history":[{"count":1,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/6604\/revisions"}],"predecessor-version":[{"id":6802,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/6604\/revisions\/6802"}],"wp:attachment":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}