Fastlyのプログラマから見たCDN

#cdn_study 発表資料 (2018/4/13)

1. 'BTUMZͷϓϩάϥϚ͔Βݟͨ$%/ Ԟ Ұึ ೥݄
2.  • ೥૑ۀͷ$%/ • ໿ਓͷैۀһ • ੈք̓ϲॴʹΦϑΟε • 5CQTͷόϯυ෯ 'BTUMZͱ͸
3.  • ೥݄ೖࣾ • 1SJODJQBM
   044
   &OHJOFFS – )551
   5-4
   26*$࣮૷ʮ)0ʯͷ։ൃ – ͦΕΒϓϩτίϧͷඪ४Խ׆ಈʹࢀՃ ࣗݾ঺հ
4.  ຊ೔͓࿩͢Δ಺༰͸$%/ͷதͷΤϯδχΞ ͔ΒݟͨݸਓతҙݟͰ͋Γɺࣾͱͯ͠ͷݟ ղΛࣔ͢΋ͷͰ͸͋Γ·ͤΜ ͓͜ͱΘΓ
5.  • 'BTUMZͷ101ઃܭ • શੈքతͳ෼ࢄ,74 • &EHF
   $MPVE • ΠϯλʔωοτͷਐԽͱ$%/ ΞδΣϯμ
6.  'BTUMZͷ101ઃܭ
7.  $%/ʹΩϟογϡͤͨ͞΄͏͕଎͍ $%/ʹΩϟογϡͤͨ͞΄͏͕͍҆ ˣ Ωϟογϡώοτ཰ΛߴΊ͍ͨ $%/Λ࢖͏ཧ༝
8.  IUUQTXXXGBTUMZDPNOFUXPSLNBQ 101T
9.  • ίϯϏχϞσϧ – Ϣʔβͷۙ͘ʹͨ͘͞Μͷ101 – ϝϦοτ
   ௿ϨΠςϯγ • εʔύʔϚʔέοτϞσϧ – *9ͷۙ͘ʹڊେͳ101 – ϝϦοτ
   Ωϟογϡώοτ཰ߴ ̎छྨͷϞσϧ
10.  • Ωϟογϡώοτ͠ͳ͍ͳΒϨΠςϯγ Λ࡟Δҙຯ͕ͳ͍ • ਺NTϨΠςϯγ͕૿͑Δͱͯ͠΋ɺώο τ཰ͷߴ͍ڊେͳ101Λ഑ஔ͢΂͖ ˣ ڊେͳ101ͳΒͰ͸ͷٕज़త՝୊ͱ͸ 'BTUMZ͸εʔύʔϚέοτϞσϧ
11.  • 101ຖͷΩϟύγςΟ ྫ  – ࠷େ5CQTΫϥεͷωοτϫʔΫ • ໿.
    314 – ୆ͷαʔόΫϥελ • (#ϝϞϦ • 5#
    44% • νϟϨϯδ
    ίετͱߴՄ༻ੑ 'BTUMZͷ101
12.  ϧʔςΟϯά
13.  IUUQTXXXGBTUMZDPNCMPHCVJMEJOHBOETDBMJOHGBTUMZOFUXPSLQBSUGJHIUJOHGJC ϧʔλϨεɾϧʔςΟϯά
14.  ϩʔυόϥϯα L2SW L/B Server B Server A Server C
15.  εςʔτϨεɾϩʔυόϥϯε L2SW Server B Server A Server C ECMP (hash(ip:port))
16.  εςʔτϨεɾϩʔυόϥϯε L2SW Server B Server A Server C ECMP (hash(ip:port)) IUUQTXXXGBTUMZDPNCMPHCVJMEJOHBOETDBMJOHGBTUMZOFUXPSLQBSUCBMBODJOHSFRVFTUT
17.  • ཁ݅ – Ϋϥελ಺Ͱ࠷௿̎ϊʔυ͕ॻࠐ – ฏۉXSJUFTTFDɾTFSWFS • )551Ϩεϙϯεͷ͕Ωϟογϡߋ৽ͱԾఆ • ॻ͖ࠐΈ୯Ґʹ)551Ϩεϙϯε ൺֱతେ • 44%ͷ໰୊ – ॻࠐϨΠςϯγ – ΢ΣΞϨϕϦϯά 44%Ωϟογϡ
18.  • ղܾࡦ – ಠࣗϑΝΠϧγεςϜ – Ұൠతͳ GT
    ΑΓ؇͍Ұ؏ੑཁ݅ – 44%ͷಛੑʢྫ
    ϒϩοΫαΠζʣʹ࠷దԽ 44%Ωϟογϡ
19.  • ϧʔςΟϯά • 5$1ͷνϡʔχϯά – ᫔᫓੍ޚɺ*/*5$8/% • ܧଓతͳϞχλϦϯάͱϑΟʔυόοΫ – ੈք֤஍ʹϞχλϦϯάϊʔυ ωοτϫʔΫͷ؂ࢹͱνϡʔχϯά
20.  ߴ଎ͳ)551࣮૷
21.  • 'BTUMZͷ101ͷಛ௃ – εʔύʔϚʔέοτϞσϧʢߴώοτ཰ʣ – ΧελϜιϑτ΢ΣΞʹΑΓ – ߴՁͳઐ༻ϋʔυ΢ΣΞΛ༻͍ͣʹ – ߴՄ༻ੑͱߴޮ཰ੑΛ࣮ݱ • ϧʔςΟϯά • ϩʔυόϥϯε • ϑΝΠϧγεςϜ • ܧଓతͳ؂ࢹ – 5$1
    5-4
    )551Ϩϕϧͷνϡʔχϯά ·ͱΊ
22.  શੈքతͳ෼ࢄ,74
23.  • 7BSOJTI
    $POUSPM
    -BOHVBHF
    7$-
    – )551ϦΫΤετͷॲཧΛΧελϚΠζ͢Δ ϓϩάϥϛϯάݴޠ sub vcl_miss { if (req.http.User-Agent ~ "Googlebot") { set req.backend = F_special_google_backend; } return(fetch); } ϓϩάϥϜՄೳͳ$%/
24.  • ϦΫΤετͷϧʔςΟϯά • ϦΫΤετͷॻ׵ • Ϩεϙϯεϔομͷॻ׵ • ϦΫΤετͷ࠶ૹʢճ਺੍ݶ͋Γʣ • ʜ 7$-ͰͰ͖Δ͜ͱ
25.  • 63-Λࢦఆͯ͠ͷύʔδ • αϩήʔτɾΩʔΛࢦఆͯ͠ͷύʔδ – ಛఆͷΩʔ͕͍ͭͨΩϟογϡΛ·ͱΊͯ ύʔδ HTTP/1.1 200 OK Content-Type: text/html Content-Length: 1234 Surrogate-Key: mainpage template-a … Πϯελϯτɾύʔδ
26.  • ϓϩάϥϜՄೳͳ$%/ • 63-Ͱࢀর͠ɺΩϟογϡ – ϦΫΤετॻ׵ʹΑΓ೚ҙͷΩʔͰࢀরՄೳ • ೚ҙͷλΠϛϯάɾཻ౓Ͱύʔδ શੈքతͳ෼ࢄ,74
27.  4IJFMEJOH Origin NRT POP LHR POP SFO POP ITM POP
28.  • ٕज़ཁૉ – େ༰ྔͷΩϟογϡ – Πϯελϯτɾύʔδ – 4IJFMEJOH ۃΊͯߴ͍Ωϟογϡ཰Λ࣮ݱՄೳ
29.  &EHF
    $MPVE
30.  • 8FC
    "QQMJDBUJPO
    'JSFXBMM – σϑΥϧτʴΧελϚΠζՄೳͳϧʔϧ • %%P4 – $%/͸ωοτϫʔΫ༰ྔ͕େ͖͍ • খ͞ͳ%%P4͸໰୊ʹͳΒͳ͍ – %%P4ʹରԠ͢Δઐ༻ͷ4JOL ߈ܸରࡦ
31.  • ը૾ͷαΠζɺ඼࣭ɺѹॖํࣜΛΫϥΠ Ξϯτຖʹ࠷దԽ ը૾࠷దԽ
32.  <div id="content"> <div id="header"> <img src="/images/logo.jpg" /> <esi:include src="/shopping_cart" /> </div> <div id="items"> <span id="item_1">...</span> <span id="item_2">...</span>… <span id="item_3">...</span>… <span id="item_4">...</span>… &EHF4JEF
    *ODMVEFT
33.  ϚΠΫϩαʔϏε߹੒
    ೝূ IUUQTTQFBLFSEFDLDPNSZZTENJDSPTFSWJDFTPOGBTUMZ
34.  ΠϯλʔωοτͷਐԽͱ$%/
35.  •  5$1 •  ΢Σϒ஀ੜ •  )551 •  5-4 •  )551 •  5-4
    ࣮࣭ 5-4
     •  26*$
    ࣮࣭ 5$1
     Πϯλʔωοτϓϩτίϧͷྺ࢙
36.  • ϓϩτίϧ্ͷ੍ݶ͕ϘτϧωοΫʹ • εϚʔτϑΥϯͷීٴ • $%/ͷຄڵ – ϓϩτίϧਐԽʹ͸ΫϥΠΞϯτ։ൃऀͱ αʔό։ൃऀͷ߹ҙ͕ඞཁ – αʔό։ൃʹ౤ࢿ͢Δ૊৫ʹ$%/ • εϊʔσϯࣄ݅  ͳͥࠓͳͷ͔ r ͍͔ͭ͘ͷཧ༝
37.  • શͯͷ௨৴Λ҉߸Խ – ϓϥΠόγʔอޢͱߗ௚Խରࡦͷཱ྆ • ΑΓਝ଎ͳηοτΞοϓ – 355
    1VTI
    &BSMZ
    )JOUT • ωοτϫʔΫΛ·͍ͨͰ΋్੾Εͳ͍௨৴ – ઀ଓͷϋϯυΦʔόʔͱϚϧνύεରԠ • ྼѱͳ؀ڥԼͰ΋೪Γڧ͘ – ϔουΦϒϥΠϯϒϩοΩϯάͷղܾɺલํ Τϥʔగਖ਼ ϓϩτίϧਐԽͷํ޲ੑ
38.  • %/4
    PWFS
    )5514 – %/4ΫΤϦͷԠ౴΋$%/͔ΒɺηΩϡΞʹ • &BSMZ
    )JOUT
    
    $BDIF
    %JHFTUT
    GPS
    ) – ΦϦδϯͷॲཧதʹ$%/͔ΒΞηοτΛ഑৴ • 4FSWFS
    5JNJOH – ϦΫΤετड৴ɺϨεϙϯεੜ੒ɺ഑৴λΠϛϯάΛ+4Ͱऔಘ • 4FDPOEBSZ
    $FSUJGJDBUFT – ̍ຊͷ5-4઀ଓͰෳ਺ͷূ໌ॻΛ࢖༻ • 4IPSU
    5FSN
    $FSUT
    
    %FMFHBUFE
    $SFET – ൿີݤ࿙ӮͷӨڹΛ੍ݶ ݕӾରࡦؚΉ • 7BSJBOUT – 7BSZͷΩϟογϡരൃ໰୊Λղܾ $%/ʹಛʹؔ܎ͷ͋Δϓϩτίϧ֦ு
39.  26*$
40.  26*$ IUUQTXXXJFUGPSHQSPDFFEJOHTTMJEFTTMJEFTRVJDQEG
41.  • ʙ355Ͱͷ઀ଓཱ֬ • ϔουΦϒϥΠϯϒϩοΩϯάͷղܾ • ωοτϫʔΫΛ·͍ͨͰ΋్੾Εͳ͍ • ΑΓྑ͍ϓϥΠόγʔอޢ • ਐԽΛଓ͚Δ௨৴ϓϩτίϧ – Χʔωϧ΍ϧʔλͷӨڹΛഉআ • ΞοϓσʔτͰ͖ͳ͍σόΠε͸௕ظతʹݟͯअ ຐʹͳΔ 26*$ͷ໨ඪ
42.  • τϥϯεϙʔτͷઃܭ͸ݻ·Γͭͭ͋Δ – ࢒݅ • ϋϯυγΣΠΫઃܭͷϦϑΝΫλ • ύέοτ൪߸҉߸Խ • )551ʗϔομѹॖͷৄࡉ͸͜Ε͔Β 26*$ඪ४Խͷਐ௙ঢ়گ
43.  26*$
    r ૬ޓ઀ଓࢼݧ
44.  • .BSL
    /PUUJOHIBN – )551 26*$
    8(ٞ௕
    *"#ϝϯόʔ • +BOB
    *ZFOHBS – *$$3(ٞ௕
    26*$ඪ४ͷΤσΟλ • +PFM
    +BFHHMJ – /FUNPE 8(ٞ௕ • .FMJOEB
    4IPSF – 5SBOT
    8(
    %*/3(ٞ௕
    *"#ϝϯόʔ 'BTUMZͱϓϩτίϧඪ४Խ
45.  ·ͱΊ
46.  • ΑΓ҆͘ɺΑΓ଎͘ίϯςϯπΛ഑৴ – ߴ͍Ωϟογϡώοτ཰Λ࣮ݱ • શੈքతͳ෼ࢄ,74 – ϓϩάϥϚϒϧͳ$%/ – ॊೈͳ੍ޚ • &EHF
    $MPVE – ͞Βʹ༷ʑͳػೳΛఏڙ • ϓϩτίϧͷਐԽΛଅਐ – )551
    5-4
    
    26*$
     $%/ͱͯ͠ͷϛογϣϯ