レガシーシステムの再構築。システム設計からプロジェクト運用まで赤裸々に

by Genki Sato

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ϨΨγʔγεςϜͷ࠶ߏங γεςϜઃܭ͔ΒϓϩδΣΫτӡ༻·Ͱ੺དʑʹ גࣜձࣾϠϓϦ  5FDI-FBEࠤ౻ݯل

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גࣜձࣾϠϓϦ w εϚϗΞϓϦΛϒϥ΢βͰ؆୯ʹ։ൃɾ੍࡞Ͱ͖Δʮ:BQQMJʯΛӡӦ w ೥݄ઃཱɺࣾһ਺໊ऑ !2

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"HFOEB :BQQMJͱ͸Ͳ͏͍ͬͨαʔϏε͔ γεςϜߏ੒ ՝୊఺ʢٕज़తෛ࠴ʣ ՝୊ͷղফΛ໨ࢦͨ͠ϓϩδΣΫτͷऔΓ૊Έ !3

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:BQQMJͱ͸ !4

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ඇΤϯδχΞ͕ ϒϥ΢βͷΈͰΞϓϦΛ ։ൃɾӡ༻Ͱ͖ΔϓϥοτϑΥʔϜ l:PVS"QQMJ͋ͳͨͷΞϓϦz !5

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‣ ௨ৗJ04΍"OESPJEͱ͍ͬͨΞϓϦΛ࡞੒͢Δʹ͸ w ࣗࣾͰΤϯδχΞΛ๊͑Δ w ֎෦ͷձࣾʹൃ஫͢Δ ‎খ͍͞վमͰ͋ͬͯ΋खଓ͖͕൥ࡶͰೲ඼·Ͱʹ͕͔͔࣌ؒΔ w ཁ݅ఆٛॻ΍࢓༷ॻΛॻ͍ͨΓߋ৽͝ͱʹೲ඼νΣοΫͨ͠Γ ‣ ಛʹඇ*5ܥاۀʹͱͬͯ͸͍ͣΕ΋ϋʔυϧ͕ߴ͔ͬͨ !6

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‣ εΫϥον։ൃͱൺ΂ͯ୹͍ظؒͰΞϓϦ͕ߏஙͰ͖·͢ w ઐ೚ͷ੍࡞νʔϜ͕σβΠϯ΍ೖߘ࡞ۀΛ͓ख఻͍͢Δέʔε΋ w σβΠϯͷࣗ༝౓ʹ͸ͩ͜Θ͍ͬͯΔͷͰ඼࣭ͷߴ͍ΞϓϦ͕࡞Ε·͢ ‣ $.4ʢΞϓϦɾίϯςϯπ؅ཧը໘ʣ্ͷϒϥ΢βૢ࡞͚ͩͰҰਓͰ΋ߏஙͱӡ༻͕ Ͱ͖·͢ w ཁ݅ఆٛॻɾ࢓༷ॻ͔Βղ์ ‣ ίϯςϯπͷߋ৽͸৹ࠪΛ͢Δ͜ͱͳ͘ϦΞϧλΠϜʹߦ͑·͢ ‣ ओཁ,1*ͷτϥοΫ͕Ͱ͖·͢ !7

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ಋೖاۀࣾ !8

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!9 Fast growth We are growing at the rate of T2D3, as we successfully penetrate traditional enterprises and other non-IT enterprises. Efﬁcient growth We’ve taken only USD 7.6M of capital to-date. About 1/3 is still sitting in our bank. Our revenue has grown close to 1,000x or over 2x the money burnt. Note: T2D3 is the benchmark growth rate for SaaS unicorns, where your MRR   (monthly recurring revenue) grows at 3x twice and 2x three times. Growing fast (T2D3) and efﬁcient

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γεςϜߏ੒ !10

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‣ $.4ܥ౷ w ΫϥΠΞϯτ͕ೖߘ࡞ۀΛߦ͏ w ࠓճ͸͢΂ͯ͜ͷܥ౷ͷ͓࿩Ͱ͢ ‣ /BUJWFܥ౷ w ΤϯυϢʔβ͕ͨͨ͘"1*Λड͚Δ w खલͷQSPYZͰੵۃతʹDBDIF͍ͯ͠Δ ‣ #BDLFOEܥ౷ w 1VTI഑৴ͳͲϔϏʔͳλεΫΛड͚࣋ͭ w Ұ෦੾Γग़͞ΕͨαʔϏεͷ࣮૷΋͍࣋ͬͯΔ !11

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!12 main with SQLite native with SQLite native with SQLite Instance Instance Instance Instance proxy proxy proxy DB Instance DB instance read replica Instance Instance Instance Instance Instance Instance $.4ར༻ऀ ΤϯυϢʔβ QSPYZ DBDIF BQQ $.4 BQQ OBUJWF CBDLFOE CMS Client Mobile client ˞؆ུԽͨ͠ߏ੒ਤͰ͢  ˞هࡌ͍ͯ͠ͳ͍ܥ౷΋͋Γ·͢

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‣ ϑϩϯτ w 1)1ͷίʔυͷதʹK2VFSZͰ࣮૷ w 6*෦෼͸ϑϩϯτνʔϜɺϩδοΫ෦෼͸αʔόνʔϜ ‣ αʔόαΠυ w ϑϨʔϜϫʔΫΛ࢖Θͳ͍ɺੜͷ1)1Ͱ࣮૷ !13

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‣ ετϨʔδ͸"VSPSB.Z42-ͱ42-JUFͷϋΠϒϦου w ϢʔβσʔλͳͲ͸"VSPSB w ΞϓϦͷϚελ৘ใ͸42-JUF w ΋ͱ΋ͱ͸͢΂ͯ42-JUF͕ͩͬͨαʔϏε֦େʹ൐͍"VSPSB΁Ҡߦ !14

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‣ ͍͔ʹ΋ϨΨγʔͬΆ͍ʁ ‣ 42-JUF͸͋Γ͑ͳ͍ͷͰ͸ʁ !15

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‣ 42-JUF͸ϚϧνςφϯτͷৼΔ෣͍Λߟ͑Δͱ౎߹ͷΑ͍෦෼΋͋Δ !16

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‣ ςφϯτʹΞϓϦ w ςφϯτ͝ͱʹͭͷ42-JUFϑΝΠϧʹͳ͍ͬͯΔ ‣ ςφϯτ͝ͱͷεφοϓγϣοτ͕༰қ w ΞϓϦ୲౰ऀ͕͍ͭͰ΋ΞϓϦͷίϯςϯπΛؙ͝ͱอଘɾ੾Γ໭͠Ͱ͖Δػೳ w ੾Γ໭͠ͷͨΊʹߋ৽ͨ͠෦෼͚ͩखͰ໭͢ͷ͸ͱͯ΋ਏ͍ w ͜ͷػೳ͕͋Ε͹ϫϯΫϦοΫͰಛఆͷόʔδϣϯ΁੾Γ໭ͤΔ w ؆୯ʹ੾Γ໭ͤΔ͔Βؾܰʹߋ৽Ͱ͖Δ w ։ൃऀ͸ϑΝΠϧίϐʔͰ࣮૷Ͱ͖Δ !17

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‣ ͱ͸͍͑՝୊ײ΋ w εέʔϧΞ΢τ͕೉͍͠ w ࣮σʔλ͸΄ͱΜͲ+40/؅ཧ w ࣮૷ͷৄࡉΛΈͳ͍ͱ+40/εΩʔϚ͕Θ͔Βͳ͍ w +40/εΩʔϚͷมߋʹ࡞ۀίετ͕͔͔Δ w σϓϩΠʹಠ࣮ࣗ૷͕ඞཁ !18

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‣ 42-JUFͷ୅ସ͸Կ౓͔ٞ࿦͞Ε͕ͨࣾ಺Ͱ΋·ͩ݁࿦͸ग़͍ͯͳ͍ w ಛʹεφοϓγϣοτػೳΛ3%#ͰΧδϡΞϧʹ࣮ݱ͢Δͷ͕೉͍͠ w ,74΍/P42-ɺ(JUΛ࢖͏ͱ͍͏બ୒ࢶ΋ w ΋͔ͨ͠͠Β42-JUF͕ͦ͜࠷దઓུͳͷͰ͸ ‣ ୅ସʹ೰ΜͰ͍Δ͏ͪ͸ٕज़తෛ࠴Ͱ͸ͳ͍ !19

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ϓϩμΫτͷ՝୊ !20

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‣ 6*ͷτϨϯυ͔ΒऔΓ࢒͞Ε͓ͯΓɺ࠷ઌ୺ͷΠϝʔδ͕΋ͪʹ͍͘ ‣ ΑΓઌਐతͳ6*ʹਐԽ͍ͤͨ͞ !22

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$.4࡮৽ !23

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‣ ೥݄ɺϓϩδΣΫτ͕࢝ಈ ‣ ϑϩϯτͷ࡞Γ௚͠͸ඞਢɺͱ͍͏ͱ͜Ζ͔ΒҶͮΔࣜʹ w αʔόଆ΋͜ΕΛػʹੜͷ1)1Λଔۀ͍ͨ͠ w ಺෦ͷઃܭ΋ݟ௚ͯ͋͠ΒΏΔ࢓༷ʹରԠͰ͖ΔΑ͏ʹ͍ͨ͠ ‎શͱ͔ͬ͑͢ΔʢҰൃٯసΛૂ͏ʣ͜ͱʹ !24

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‣ ٕज़ελοΫ w ΑΓॊೈͳ6*ΛఏڙͰ͖Δ3FBDUΛ࠾༻ w αʔόαΠυͷϑϨʔϜϫʔΫʹ-BSBWFMΛಋೖ w $.4ͷՄೳੑΛ࠷େԽͰ͖Δ಺෦ͷઃܭΛ%%%Ͱߟ͑௚ͨ͠ !25

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‣ ౰ॳͷૂ͍௨Γʹೖͬͨ w 6*ύʔπ͕৽͘͠ͳͬͨʂ w τϨϯυʹ΋௥͍͍͚ͭͨͷͰ͸ʂ ‣ Ͱ΋࣮͸͏·͍͔͘ͳ͔ͬͨ͜ͱ΋͋Δ !27

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‣ ϑϩϯτଆͷٕज़తͳ࿩ w 3FBDUͰߏங͸͕ͨ͠ਖ਼௚ɺٕज़తʹѻ͍͖Εͳ͔ͬͨ w ࡞ۀޮ཰͕௿Լͯ͠͠·ͬͨ ‣ αʔόଆͷٕज़తͳ࿩ w গ਺ϝϯόʔ͕୲౰ͨ͜͠ͱ΋͋Γɺ࣮૷ํ਑͕पΓͷϝϯόʔͱΠϝʔ δͱဃ཭͕͋ͬͨ !28

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‣ ϓϩδΣΫτਐߦͷ࿩ w ʮΑΓॊೈͳ࢓༷ʹରԠʯ͢Δ͜ͱΛߟ͍͑ͯͨΒऩू͕͔ͭͳ͘ͳͬ ͯ͠·ͬͨ w ผͷϓϩδΣΫτͷ৽ػೳͷΈ͕৽͍͠ΞʔΩςΫνϟͰ࣮૷͞Εઌʹ ϦϦʔεɺຊྲྀͷ࡮৽ϓϩδΣΫτ͸಴࠳ͯ͠͠·ͬͨ w ઌ΄Ͳ͓ݟͤͨ͠ը໘͸৽ػೳͷ΋ͷͰͨ͠ !29

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‣ 6*ɺٕज़ελοΫ͕৽چࠞࡏͯ͠͠·͏ঢ়گʹͳͬͯ͠·ͬͨ ‣ ٕज़બఆɺϓϩδΣΫτਐߦͷ྆໘ͰۤौΛຯΘͬͨ !30

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͔͠͠զʑ͸ఘΊͳ͍ !31

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$.4࡮৽ɾϦϕϯδ !32

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‣ ҰൃṢճ΁ͷνʔϜͷϞνϕʔγϣϯ͸͞ΒʹੵΈ্͕͍ͬͯͨ w 6*Λ࡮৽ɾ౷Ұ͍ͨ͠ w 6*͕ࠞࡏͯ͠͠·͍ͬͯΔ w 69ʹ΋ѱӨڹ w Ϧϕϯδ͍ͨ͠ w αʔϏεͷ੒௕ͱͱ΋ʹ෾ग़͖ͯͨ͠৽ͨͳٕज़త՝୊ʹ΋ରԠ͍ͨ͠ ‣ ೥݄ɺϓϩδΣΫτ࢝ಈ !33

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‣ ܦݧΛ౿·͑ͯϓϩδΣΫτͱͯ͠औΓ૊Μͩ͜ͱ w ΰʔϧΛݻఆͨ͠ w ݱߦ࢓༷Λਅͱͯͦ͠ΕҎ্ͷػೳ௥ՃΛ͠ͳ͍͜ͱʹͨ͠ w શһͰ࡮৽ϓϩδΣΫτʹऔΓ૊ΊΔମ੍Λ࡞ͬͨ w ৽ػೳ։ൃ͸ࢭΊͨ w ͱ͸͍͑Ұ੾ϦϦʔεΛ͠ͳ͍ͷ͸Ϗδωεతʹ೉͍͠ w ೔ʹͪΛܾΊͯػೳվળσʔͱ͠ɺ෦શମͰ޻਺ͷ഑෼Λ໌ࣔతʹߦͬͨ !34

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‣ IUUQTXXXXBOUFEMZDPNDPNQBOJFTZBQQMJQPTU@BSUJDMFT !35

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‣ ܦݧΛ౿·͑ͯϑϩϯτଆͰऔΓ૊Μͩ͜ͱ w ٕज़ݕূͷ࣌ؒΛ௕Ίʹͱͬͨ w ϓϩτλΠϓΛ࡞࣮ͬͯ૷ͷײ֮Λ௫Ή͜ͱʹͨ͠ ‣ ܦݧΛ౿·͑ͯαʔόଆͰऔΓ૊Μͩ͜ͱ w ܾΊͨ͜ͱɾߟ͑ͨ͜ͱʹ͍ͭͯγΣΞɾٞ࿦͢Δ৔Λઃ͚ͯօͰ֬ೝ ͢Δ͜ͱʹͨ͠ !36

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҆ఆͯ͠ϓϩδΣΫτʹऔΓ૊Ή͜ͱ͕Ͱ͖ΔΑ͏ʹͳͬͨʢ౰ࣾൺʣ ϓϩδΣΫτӡ༻ͷվળʹ੒ޭʂ !38

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࡮৽ɾϦϕϯδͷٕज़બఆ !39

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‣ બఆ࣌ʹڞ௨ͯ͠ؾΛ͚ͭͨϙΠϯτ w ݱঢ়ͷνʔϜߏ੒ɾϨϕϧײʹϚον͍ͯ͠Δ͜ͱ w ద੾ʹϨΠϠʔ෼ׂ͕͞Ε͍ͯͯɺ೉͗ͣ͢͠ɺ͔ͭ؆୯͗͢ͳ͍ w ࣍ʹ͘ΔΞʔΩςΫνϟʹ௥ै͠΍͍͢͜ͱ w ૊৫ͷ֦େʹ͍͍͚ͭͯΔΠϝʔδ͕࣋ͯΔ͜ͱ !40

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‣ ϑϩϯτ w /VYU XJUI7VFY Λ࠾༻ w 3FBDUͱൺֱͯ͠ΧδϡΞϧʹ࢖͑ͨ w ϏδωεϩδοΫͱςϯϓϨʔτ͕෼ׂ͞Ε͍ͯͯݱঢ়ͷνʔϜߏ੒ͱ ͷ૬ੑ͕Α͔ͬͨ w ৄࡉ͸-5࿮Ͱʂ !41

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‣ αʔόαΠυ w (PMBOHΛબ୒ w (PMBOHͷϝϞϦɾ$16ޮ཰ʹظ଴ͨ͠ w 1)1ΛQIQGQNͰӡ༻͓ͯ͠ΓΞϓϦέʔγϣϯαʔό͕ϝϞϦ ωοΫʹ͍ؕͬͯͨ w ͢Ͱʹখ͍͞ػೳͰࣾ಺ͷಋೖ࣮੷͕͋ͬͨ w ੩తղੳ͕ʢGPSNBUUFS MJOUFSʣ͕४උ͞Ε͓ͯΓ։ൃ͠΍͍͢ !42

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‣ αʔόαΠυ w ϚΠΫϩαʔϏε͸·ͩૣ͍ͱߟ͑ಋೖ͠ͳ͍͜ͱʹͨ͠ w ΠϯϑϥΛؚΊͨαʔόαΠυΤϯδχΞ͕ਓऑ w αʔϏεͷ෼ׂͷ࢓ํ͸ͦΕ୯ମͰେ͖ͳςʔϚ w কདྷͷ૊৫ߏ଄ΛΈ͔ͯΒͰ΋஗͘ͳ͍ w σΟϨΫτϦߏ੒͸ઓུత%%%Λҙࣝ͠ͳ͕ΒϨΠϠʔ෼ׂ !43

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‣ Πϯϑϥ /FX w "84'BSHBUFΛબ୒ w LTͷ͕͖࣍ͨͱͯ͠΋%PDLFSίϯςφͳΒେ͖͘͸֎Εͳͦ͞͏ w ετϨʔδʢ42-JUF "VSPSBʣ͕"84ʹ͋ΔͨΊ($1͸அ೦ w ٞ࿦͍ͯͨ͠ͱ͖ʹ'BSHBUFͷ೔ຊϦʔδϣϯ͕ϦϦʔε͞Ε࢖ͬͯΈ͔ͨͬͨ w 42-JUFΛͲ͏͢Δ͔໰୊͸͍ͬͨΜ୨্͛͢Δ͜ͱʹͨ͠ w ৽چͷ੾Γସ͕͑Մೳͳঢ়ଶͰҠߦ͢Δඞཁ΋͋ͬͨͨΊ w 42-JUFϑΝΠϧΛ͍࣋ͬͯΔαʔόʹΠϯλʔϑΣʔεͱͳΔαʔϏεΛߏங !44

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‣ HFOFSBUF͞Εͨϑϩϯτίʔυ͸4$MPVE'SPOUͰ഑৴ ‣ ϑϩϯτ͔ΒͷϦΫΤετ͸H31$8FC ‣ $.4BQQ ‣ ϑϩϯτ͔ΒͷϦΫΤετΛड͚औΔαʔϏε ‣ FHSFTT JOHSFTTͱ΋ʹFOWPZΛܦ༝ͤ͞Δ ‣ 42-JUFXSBQQFSBQQ ‣ 42-JUFΛϥοϓͯ͠H31$ܦ༝Ͱॲཧ͢ΔαʔϏε !45 main with SQLite  SQLite wrappter app $.4ར༻ऀ envoy CMS app Client ˞؆ུԽͨ͠ߏ੒ਤͰ͢

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‣ ࣮ࡍʹऔΓ૊Έ࢝ΊͯΈ࣮ͨײ w ϓϩδΣΫτͷӡ༻΋ΞʔΩςΫνϟ΋εςοϓΞοϓͰ͖ͨ w νʔϜͷೲಘײΛৢ੒Ͱ͖ͨ͜ͱ΋େ͖͍ w ࣦഊΛྐʹͰ͖͍ͯΔ !46

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௚ۙͰͨ՝୊ͱऔΓ૊Έ !47

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‣ ։ൃΛਐΊ͍ͯ͘தͰ΋՝୊͸Ͱͯ͘Δ ‣ ෛ࠴ͷ࠶ൃ໌Λ͠ͳ͍ͨΊʹि࣍ͷৼΓฦΓͰͻͱͭͻͱͭ௵͢ !48

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‣ ٕज़ͷཧղϨϕϧ͕͔Έ߹Θͣٞ࿦ͷޮ཰͕ѱ͍͜ͱ͕ग़͖ͯͨ ‎ํ਑ΛͦΖ͑ɺڞ௨ݴޠΛ࡞͍ͬͯ͘ w ษڧձ΍ίʔυϦʔσΟϯάձ͸༗ޮ w ࠷ॳ͔Β޿͛͗ͣ͢ϋʔυϧΛ͋͛͗ͣ͢ w νʔϜΈΜͳͰ΍Δ !50

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‣ ਓʹΑͬͯόϥόϥͷ໋໊نଇ w 'JOE (FU 'FUDI w %FMFUF 3FNPWF w 6TFST 6TFS-JTU w 4DSPMM.FOV 4DSPMMNFOV !52

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‣ ࣮ࡍʹ΍ͬͯΈΔͱਏ͍+40/ͷύʔε w +40/͕1)1ͷKTPO@FODPEFʢΦϓγϣϯͳ͠ʣͰ֨ೲ͞Ε͓ͯΓ(PMBOHͰղऍ͢Δͷ͕ਏ͍ w ࿈૝഑ྻ͕ۭͬΆʹͳΔͱ഑ྻʹͳΔ w \LFZWBMVF^ͷཁૉ͕ͳ͘ͳΔͱ<>ͱ+40/্Ͱදݱ͞ΕΔ w ܕͷఆ͕ٛҰͭʹఆ·Βͳ͍ w 6ONBSTIBM͢Δ·ͰԿ͕ೖ͍ͬͯΔ͔Θ͔Βͳ͍ w +40/εΩʔϚͷϚΠάϨʔγϣϯΛߦ͍ͬͯΔՕॴ΋ ‎೰ΈΛڞ༗ͯ͠ਓபΛܾΊɺղܾͨ͠Βϊ΢ϋ΢Λڞ༗ͯ͠΋Β͏ !55

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‣ ޻ظ͕৳ͼͯ͠·͏໰୊ w ͜ͷखͷϓϩδΣΫτͰ͸࣮֬ʹى͜Δ͕Ϗδωεଆͱͷڞ௨ೝࣝͰ͸ ͳ͔ͬͨ ‎Ϗδωεͱͯ͠ଥڠͰ͖ΔϥΠϯͱ࣮ݱͰ͖ΔϥΠϯ͕Ͳ͜ͳͷ͔Λࣾ಺ Ͱڞ༗͠ɺޓ͍ͷཁٻΛཧղ͠߹͍ཁ݅Λ֬ೝ͠ଓ͚Δ͜ͱ͕େࣄ !57

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·ͱΊ !58

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‣ ϑοτϫʔΫͷ͍ܰߏ੒͕ͦ͜ड͚ೖΕΒΕΔαʔϏεʹͳΔඞਢ৚݅ w 1.'·Ͱ͸ͩ͜ΘΓ͗͢ͳ͍ w ചΕΔίʔυ͸ਖ਼ٛ !59

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‣ ͍͢͝ϓϩμΫτΛ΋ͬͱ͍͢͝ϓϩμΫτʹ͢ΔͨΊʹ౤ࢿ͸ඞཁ w ҰճͰ੒ޭ͢Δͱ͸ݶΒͳ͍ʢ௅ઓ͸͓ૣΊʹʣ w ࣦഊ͸ྐʹ͢Δ w ෛ࠴ͷ༧๷΋ߟྀʹೖΕΔ ‣ ੒ޭ͍ͯ͠ΔϓϩμΫτͷϨΨγʔγεςϜͦ͜৽͍͜͠ͱʹ௅ઓ͢Δҙ ຯ͕͋Δ w θϩ͔Βߏங͢ΔΑΓٕज़తϋʔυϧ͕ߴ͍͕ɺ࿹͕໐Δ !60

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5IBOLZPV  8FSFIJSJOH !61 ΞϓϦͷςΫϊϩδʔΛ։์͠ɺ ੈͷதΛ΋ͬͱศརͰշదʹɻ