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L4周辺の高機能通信路とネットワークの階層構造の再考
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Hiroki Watanabe (nelio)
June 25, 2018
Technology
1
810
L4周辺の高機能通信路とネットワークの階層構造の再考
2016-06-25 に TECH PLAY SHIBUYA で行われた『Turing Comple FM ミートアップ』の LT 枠で発表したスライドです.
Hiroki Watanabe (nelio)
June 25, 2018
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Transcript
-पลͷߴػೳ௨৴࿏ͱ ωοτϫʔΫͷ֊ߏͷ࠶ߟ 5VSJOH$PNQMFUF'.ϛʔτΞοϓ !5&$)1-":4)*#6:" +VO OFMJP
• ࣗݾհ • -BZFSपลͷߴػೳ௨৴࿏ͷհ • ֊ߏΛ࠶ߟ͢Δ • ·ͱΊ֊ߏΛߟ͑͢ҙຯ 2 ͘͡
• ͶΓ͓PSͶΓ ֶੜ% - 5XJUUFS!@@OFMJP@@ - )1IUUQTOFHMJHJUIVCJP - ݚڀ&EHF$PNQVUJOH
4%//'7 ɹɹϓϩτίϧ\ϨΠϠϦϯά ελοΫ^ • ࠷ۙͷ׆ಈ - %PDLFS/'7 ڞஶ τϙϩδΛߟྀͨ͠*B$ ڞஶ - ֊ಠཱੑͷߴ͍ωοτϫʔΫߏ ਐߦத 3 ࣗݾհ ৽͍͠ΈΈΛܗʹ͍ͨ͠ਓ
• 5$1 $6#*$ ͰσʔλΛૹ৴ νϡʔχϯάແ͠ - ૹड৴ऀؒ355NT - 5$1ϓϩΩγૹड৴ऀؒͷதؒʹҐஔ
- όοΫάϥϯυτϥϑΟοΫແ͠ • ૹड৴ؒεϧʔϓοτ͕ߴ͍ͷͲͪΒ - 5$1ϓϩΩγͳ͍߹PS͋Δ߹ 4 ಥવͰ͕࣭͢Ͱ͢ ૹ৴ऀ ड৴ऀ RTT: 30ms ૹ৴ऀ ड৴ऀ TCPϓϩΩγ RTT: 30ms RTT: 15ms
• 5$1ϓϩΩγ͕͋Δ߹ͷ΄͏͕͍ - ຊ࣭5$1ͷ&OEUP&OE && 355Λॖখ • ཧ CQT 8JOEPX4J[F
CJU 355 T • 5$1ͷ-POH'BU1JQF - 355͕େ͖͍ͱଳҬΛ͍Εͳ͍ • ͞Βʹϩε͕ൃੜ͢Δͱ࠶ૹཁٻ͕۠ؒ͘ͳΔ - ߴػೳ௨৴࿏ʹΑΔղܾ • 5$14QMJUUJOHʹΑΔ355ׂ • Ϛϧνύε௨৴ʹΑΔଳҬू 5 ਖ਼ղ
• 5$1"DDFMFSBUJPO<$PN$PN`> - 355ׂʹΑͬͯ5$1ͷεϧʔϓοτΛ্ • %FMBZ5PMFSBOU/FUXPSLJOH %5/ - ϩε͕ൃੜͨ͠߹ͷ࠶ૹ͕۠ؒ͘ࡁΉ
• -ʹ͓͚Δ&&௨৴่͕ΕΔ - ͱ͍͑ݱ࣮ʹϛυϧϘοΫε͕͋;ΕΔ • -ϩʔυόϥϯαɼϓϩΩγͳͲ 6 5$14QMJUUJOHͷޮՌ 5$14QMJUUJOH͞·͟·ͳߴػೳੑʹܨ͕Δ
• 5$14QMJUUJOHΛ༻͍ͨ%5/ - ૠೖͨ͠#VOEMFʹͯ&&Λ࣮ݱ • ແઢ۠ؒͱ༗ઢ۠ؒͰ5$1Λஅ • ͦΕͧΕͷ۠ؒʹಛԽ੍ͨ͠ޚ͕Մೳ 7 #VOEMFϓϩτίϧ
3'$ L7 L4 L1−L3 L7 Bundle L4 L1−L3 L4 L1−L3 TCP A TCP B ༗ઢ۠ؒ ແઢ۠ؒ
• -௨৴࿏ͷ࣮ - -ͰߴػೳੑΛ࣮ݱ͢ΔͱෳࡶԽ͢Δ - ϛυϧϘοΫεͰ-&&่͕ΕΔ • ͱ͍͑ϛυϧϘοΫεॏཁͳஔ • ֊ͷՃΛߟ͑Δ
- %5/͚ͩͰͳ༷͘ʑͳߴػೳੑΛѻ͏ͷՃ • #VOEMF%5/ͷΈ - -ϝΧχζϜͷΈఏڙ • -௨৴࿏ΛΈ߹ΘͤΔ͜ͱͰߴػೳੑΛ࣮ݱ 8 ֊ߏͷ࠶ߟ
• ΞϓϦϙϦγΛୈʹཁٻ͢Δ - ϚϧνύεɼԆੑɼ҉߸ԽɼͳͲ • -ͦΕΛ࣮ݱ͢ΔϝΧχζϜ ϙϦγͱͷ - ֤ϙϦγಉҰͰซ༻Մೳ
9 ֊ߏΛม͑ͯΈΔҰྫ ୈ5 (Layer-5) ୈ4 (Transport) ୈ7 (Application) ػೳ ࣮ ϝΧχζϜͷఏڙ ϙϦγͷऩ༰ ୈ͔Βୈলུ NJEEMFCPYػೳ ௨ৗͷ௨৴࿏ ৴པੑͳ͠ ৴པੑ͋Γ Ԇੑ ଳҬूোੑ 6%1 5$1 ௨ৗͷ5$16%1 5$16%1ΛଋͶΔ 5$16%1ͷ࿈݁ 5$16%1ͷ࿈݁ ΞϓϦέʔγϣϯ
• ݱΞʔΩςΫνϟઃܭॳʹ͍ۙ - ҰํͰωοτϫʔΫͷཁٻଟ༷Խ - ͜ͷ··ͷߏͰػೳΛՃ͢ΔํͰ͍͍ͷ͔ • ظతʹྑ͍͕কདྷͷ४උͱͯ͠ॊೈੑ͕ॏཁ • ֊ߏͱ࣮ࣾձͱͷؔ
- ΠϯλʔωοτϚϧνεςʔΫϗϧμʔ • શһʹͱͬͯ߹ͷྑ͍ΈΛߟ͍͑ͨ - ৽ͨͳੜଶܥ͕ग़དྷ্͕Δ͔͠Εͳ͍ • ࠓ$%/શظɼࠓޙ͍ΘΏΔ*P5͔ʁ 10 ·ͱΊ֊ߏΛߟ͑͢ҙຯ ֊ߏΛΓޱʹকདྷͷΠϯλʔωοτΛߟ͑Α͏
• ωοτϫʔΫஊٛ͠·͠ΐ͏ʂ 11 ͳʹͱ͋Ε