A Fast Connection-Time Redirection Mechanism for Internet Application Scalability

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Transcript of A Fast Connection-Time Redirection Mechanism for Internet Application Scalability

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N HKQS[PO@f ð FSJ�HPåSåILEByDwHPhaByá+QCHPhQO�haFSJ�Q�J]îÂJ�D�OÂhaJ�T >@?BA�CD>@?@E�F�BEQ�áP_a[IJ]_1haá@DGFIHKQSR+JkhaFIJR bTS J�QS[Âê{å>á+BEQ�h�á+ìNhaFSJCD<FIHKQSQSJ�L1haáVU 4�TcJ�J�g0BERKOS_aJ=�,4ÓçI6 6GfTU è@H�\ [SJ(SIQIJÑHKQõJ�QS[Âêå>á+ByQ�h�HPh N V1O@V�áK_�H`h�H�[SByé>J]_aJ�Q�hkFIáKT�h�f ð FIJ >a?BAGCD>@?aE�FÑT�\¨T�haJ�èD�HKLEL�D]_aJwH`haJ�TkH�QIJ]æDGFIHKQSQSJ�L�ç>J�h}æÐJ�J�Q N HPQI[WU/VÂHKQS[�_aJ�èÀáwâ�J�TÐhaFSJNDGFIHKQSQSJ�L�ç>J]h}æÐJ�J�Q N HPQI[XO�HPT6TcFSáwæ~QByQ#g0ByR+OÂ_aJ�T��,4�D�6 Y�4�[I6Gfð FSJ�_aJ;HP_aJkh}æÐá@æ6H�\¨T~haá@FIHKQS[ILyJkhaFIJ7_aJwë�OIJ�T�h1è@HK[SJkç�\ N BEQ�g0ByR+OÂ_aJ0�,4ÓçI6GfZO FdHPT

haFSJ7áKåShaBEá+Q�haáÀTcJ�QS[#H _aJ�T�å>á+QSTcJ7haá/haFSJN_aJ�ë�OSJ�T�h\[�[SOÂ_aBEQSR/haFSJ�>@?BAGC�>@?@E�F�T�\ÂT�haJ�è D�HKLyL4*��J�JkbÐJ�Lyáwæ�6GfIM�áwæÐJ]â�J]_�VIByì]O�[Sá¨J�T3QIáPh�VIhaFSJ�Q N è�OST�h~_aJ�TcJ�QS[#BihaT3åS_aJ�â¨BEá+OST3_aJ�ë�OSJ�T�h�f

accept();if (earlyRedirect()) redirect(s, NULL, endPointID);

recv(s, request);response = process(request);

if (lateRedirect()) redirect(s, response, endPointID);else send(s, response);

s=socket( SOCK_EOP_STREAM );

ÄÓ| Ç xKpGs��`pGs

send(s, request);

if (recv(s, response) < 0 ){ if (errno == EREDO) goto REDO; reportError(errno); exit(1);}

REDO:

s = socket( SOCK_EOP_STREAM );

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eop_recv

TCP

eop_redirect

udp_sendtcp_recv

eop_send

tcp_connecttcp_send udp_recv

redirectrecv, read send, writeAPPLICATION

EOP

UDP

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� A�@ ����� J�LaD L����aD

g)BER+OÂ_aJ � BELELyOST�hc_GHPhaJ�T3á+OÂ_1LEH�\�J]_aJ�[�HP_aDGFIBihaJ�D]haOÂ_aJ+f ð FSJ;HP_c_aá�æ~T1ByQS[IByDwH`haJkìÓOSQSD�haByá+QIHKL�[SJ]êå>J�QS[IJ�QSD�ByJ�T1æ~FSJ�_aJ�[IHPhGH �dá�æ~T�haFÂ_aá+OSR+FChaFSJ�ì§áK_aè@HKLµådHP_GHKèÀJ]haJ]_aTNHKQS[C_aJ�haOÂ_aQ�âKHKLEOSJ�T�f8÷J7[SJ�ì§J�_~[SBETcD�OSTcTcBEá+Q�áKìµhaFSJ;H`åIåILyBED�HPhaBEá+Q�LvH�\�J]_3haá � � ���«f� H������IM3J�HZL����]D �=d�LjJ�M3H����aMfL M� M��4A ^6ô1ZÒBET�HoTcJ�TcTcBEáKQÑLvH�\+J�_1åS_aáKhaá¨D�á+L.haFIHPh~æ3_GHPåIThc_GHPQIT�å>áK_ch7LEH�\�J]_k[IHPhGHoæ~BihaFíHKQÑ^6ô1Z FIJ�HK[SJ]_kByQíáK_a[SJ�_Nhaá�è@HKQIHKR+J J�QS[Âê{å>á+BEQ�hkè/áwâ�J]êè/J�Q�hËìÓáP_ÑhaFSJ LEByìÓJ]haBEèÀJ áKìÀhaFIJ HKTcTcá�D�BEHPhaJ�[ÌD�á+èÀè�OSQSBED�HPhaByá+QÌD<FIHKQSQSJ�L�f�8ÒFIJ�QÌJ�QS[Âêå>á+ByQ�h@èÀáwâ�J�èÀJ�Q�h@BET/_aJ�ë�OSBy_aJ�[�V�^6ô1Z�ByQ�â+áKï�J�TÀTcJ�â+J�_GHKL6ìÓOSQSD]haBEá+QST/BEQ haFSJ�^Ðô�Z LEH�\�J]_áKQohaFSJ�D�LEByJ�Q�h3HPQI[@haFIJ1TcJ]_câ�J�_�haá�D�á¨áK_a[SBEQIHPhaJNHKQS[�HPD�D�á+è/åILEByTcF�_aJ�[SBy_aJ�D�haByá+Q�f ð FSJ�^6ô1ZFSJ�HK[SJ�_Nhc_aBER+R+J]_aTN_aJ�[SBy_aJ�D�haByá+QíáKQÑhaFIJ�_aJ�è/áKhaJ/J�QS[Âê{å>á+BEQ�h�V�T�\ÂQSD<FÂ_aá+QSBEj�J�T;HKD]haByâ¨Byh}\+V�HKQS[J]îÂDGFIHKQSR+J�T6_aJ�[SBi_aJ�D]haBEá+Q#HP_aRKOIè/J�Q�haT�f

0 3216 64 96

IP ADDRESSPORT OPCODE SLEN

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1 1 1 11

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Number of Client Requests

Ave

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