IT??????????????????
???????????? ???????[ 2012/11/6 11:08:57 ] ????????
?????????????????IT??????????????????????????????????????????????????????????????????????????????????????????????Щ????ɡ?
?????????const????弰??????
const????弰??????????磺const int i???????????i???????
const?????????????????????????
??Щ????????????????????????ó???????滻????????????á?
?????????static??const???????
???????????200??100????????????????????
?????????200?????????100??????????????????????????????????????????
????????????????????????????200????????????????????100?????????
???迪??????x???????????? x + x/2 + x/4 + ...?????????????????????50%.???????????????????????????????50%???????????
?????????????????????μ??????????
????????200?????????200+100??????????????????? 200/300 = 67%.
?????????tcp?????????????accept???????????????????Σ?
accept?????????????????
??????????????????syn??(syn=j)??????????
???????????????????syn???????????????SYN??ack=j+1?????????????????ASK????ask=k????
???????????????????????????SYN??ACK???????????????????ACK(ack=k+1)??
?????????????????????????????tcp???????????????accept?????????????
???????????UDPЭ????????????????????????????
??UDPЭ??????????????????????????????
???????????????в????????ID??????timestamp?????????int??
???????????????????ID????????????????
???????????????ID??????????????????
????????????????????????????????????????????????????????????????????????????????????????????????????·?????Σ???????????????
??????????????????????????
???????????????????????????????????????ID????????????ID???????????????????????м??μ???????????????д????????????????????????????????????
????? 3600*24 = 86400??
????????????86400??????????int delta[86400]???????????????????????仯????????????????????????????????????????0??
??????ζ???????????????????????????????????????????1???????????????????????1??
?????????????????д洢??????е??????仯?????
????????????????86400??????????int online_num[86400]???????????????????????????????
???迪??????????????0?????1???????online_num[0] = delta[0]????n+1???????online_num[n] = online_num[n-1] + delta[n]??
????????????????????????????????
???????????10G?????????????
???????????? 10G ???????????????У?????????λ???????????? 2G??
????????10G????????64bit???
2G????????256M??64bit??????
????????64bit???????????????256M??????Χ????2G?????????????Χ????????????????????????????????10G?????????????????????????Χ??????????????Χ?????????????????????
????????????Χ????????????????????????????Χ????????????????????????????????Χ???????????????????????????????????????Χ??η??????С???Χ??256M=2^28??????????3?ο???????Χ??С??1????????????????
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
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