AWSが支えるEightリコメンデーションエンジンの裏側

by Yasunori Suzuki

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"84͕ࢧ͑Δ &JHIUϦίϝϯσʔγϣϯΤϯδϯ ͷཪଆ 4BOTBOגࣜձࣾɹ&JHIUࣄۀ෦  ླ໦߁׮ "84%FW%BZ5PLZP %BZ

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ླ໦߁׮ w 3VCZͰαʔϏεج൫΍"1*࡞ͬͨΓ w ࠷ۙ͸1ZUIPOͰ-BNCEB࣮૷ͱ͔ w ւ֎ཱྀߦ޷͖ ϦίϝϯσʔγϣϯνʔϜ νʔϜϦʔμ݉ςΫχΧϧɾΞʔΩςΫτ

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ܭαʔϏεҎ্

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αʔόʔϨε Ϗοάσʔλ º

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ΞδΣϯμ &JHIUʹ͓͚ΔϦίϝϯσʔγϣϯ ϦίϝϯυΞʔΩςΫνϟ࡮৽ Ϧίϝϯυσʔλચ͍ସ͑

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&JHIUʹ͓͚Δ Ϧίϝϯσʔγϣϯ

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ݸ ਓ ޲ ͚ ໊ ࢗ Ξ ϓ Ϧ

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ʮ ໊ ࢗ Λ Ϗ δ ω ε ͷ ͭ ͳ ͕ Γ ʯ ʹ ม ͑Δ

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໊ ࢗ ͷ σ ʔ λ Խ

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ͭ ͳ ͕ ͬ ͨ ૬ ख ͱ ί ϛ ϡ χέ ʔ γ ϣ ϯ

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໊ࢗަ׵

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- - - ೥໊ؒࢗަ׵"  ໿

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- - - ໿ ԯຕ

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Ϗοάσʔλ

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໊ࢗ؅ཧ͔Β ϏδωεωοτϫʔΫ΁

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ͭͳ͕Γ

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w ໊ࢗ৘ใͷΞοϓσʔτ w ϑΟʔυ౤ߘӾཡ w ϝοηʔδૹड৴ ωοτϫʔΫ ׆ੑԽ ͭͳ͕Δ͜ͱͰ

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ͭͳ͕ΓΛՃ଎ͤ͞Δٕज़

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ར༻ऀҰਓͻͱΓͷᅂ޷ʹ߹Θͤ  ίϯςϯπΛਪન Ϧίϝϯσʔγϣϯ

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ਓ෺Λਪન

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໊ࢗަ׵ϦΫΤετ⬆ ͭͳ͕Γ⬆ ঝೝ⬆ ʮͭͳ͕ΓʯΛޮ཰తʹੜΈग़͢

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Ϧίϝϯσʔγϣϯ Τϯδϯ

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࣮͸ɺ  ೥΄Ͳલ͔Βಋೖ

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چϦίϝϯσʔγϣϯΤϯδϯ ໊ࢗ௥Ճ ͭͳ͕ͬͨ ੜ ੒ ୭͕୭ʹԿΛ͔ͨ͠ ϢʔβʔΞΫςΟϏςΟ Ϧίϝϯυ  ܭࢉΤϯδϯ ຖ೔ ຖि Ұ౓ɺόονॲཧͰߋ৽

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͔͠͠ɺ

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3FETIJGU w ແବʹෳࡶͳΫΤϦ $MPVE4FBSDI w શจݕࡧͱͯ͠࢖ͬͯͳ͔ͬͨ@TDPSF w ߋ৽·ͰͷϨΠςϯγʔ

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ͭ͗͸͗ ΞʔΩςΫνϟ

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૿͑ͳ͍ ͭͳ͕Γ

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w ύϑΥʔϚϯε⬇ w ΦϖϨʔγϣϯίετ⬆

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࠷దͳ"84αʔϏε બఆͷॏཁੑ

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Ϧίϝϯυ ΞʔΩςΫνϟ࡮৽

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࡮৽ͷνϟϯε౸དྷ ࡢ೥݄

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Ϧίϝϯυʹ࠷దͳ ΞʔΩςΫνϟઃܭͱ͸

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Ϧίϝϯσʔγϣϯͷཁ σʔλ෼ੳ ΞϧΰϦζϜ ϦΞϧλΠϜϑΟʔυόοΫ γχΞσʔλαΠΤϯςΟετᐌ͘

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௚ۙͷग़ձ͍Λେࣄʹ σʔλͷ઱౓͕ྑ͍΄Ͳɺ Ϣʔβʔ͸ϦΫΤετঝೝΛ͠΍͘͢ͳΔ ͭͳ͕Δ

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lϦΞϧλΠϜz   ϦίϝϯσʔγϣϯΤϯδϯ

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։ൃظؒ  ϲ݄

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৚݅ • 2ϲ݄Ͱ͖Δ͜ͱʹϑΥʔΧε ɾεέʔϥϏϦςΟ ˠϦΞϧλΠϜੑΛ୲อ͠ɺ๲େͳσʔλΛॲཧͰ͖Δ͜ͱ

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ϨʔςΟϯάσʔλ ୭͕୭ʹԿΛ͔ͨ͠ ϢʔβʔΞΫςΟϏςΟ ϦΞϧλΠϜੑΛ୲อ͢ΔͨΊʹ தؒσʔλΛ࣋ͭ ੜϩά Ϩίʔυʹ৘ใΛ·ͱΊΔ ୭͕ "͞Μ 9͞Μ ୭ʹ #͞Μ :͞Μ ͭͳ͕Γঢ়ଶ ͭͳ͕͍ͬͯΔ ʜ ͍͍Ͷճ਺ ճ ʜ ϝοηʔδճ਺ ճ ʜ ౤ߘγΣΞճ਺ ճ ʜ '#ͭͳ͕Γ ͳ͠ ʜ

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ߏ૝ ɾϩά෦෼͸طଘͷ3FETIJGUͷσʔλΛ׆༻ wதؒσʔλߋ৽ʹ,JOFTJT-BNCEB͕࢖͑ͦ͏ w஌ݟ͕͋Δ%ZOBNP%#ΛετϨʔδʹ wγϟʔυ਺ΩϟύγςΟΛ্͛Δ͜ͱͰεέʔϧ

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͜Ε᷿ͬͯͰ࿩୊ͷ

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αʔόʔϨε ΞʔΩςΫνϟ

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ܹಈͷϲ݄Λܦͯ ɻɻɻ ৭ʑলུ

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৽ Ϧίϝϯσʔγϣϯ Τϯδϯ ஀ੜ

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ར༻"84αʔϏε ετϨʔδ ίϯγϡʔϚ -BNCEB %ZOBNP%# &MBTUJ$BDIF 3FETIJGU ετϦʔϜ %ZOBNP%# 4USFBNT ,JOFTJT4USFBNT

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logging Streaming Triggered Write Send Message Polled Get Write Triggered Set Ϣʔβʔ ΞΫςΟϏςΟ Get Set 8FCαʔόʔ #BUDIαʔόʔ Ϧίϝϯυ ݁Ռ Triggered ϩάऩू ϨʔςΟϯάσʔλ  தؒσʔλ ੜ੒ ϨʔςΟϯάσʔλ  Ωϟογϡੜ੒ ਪનσʔλܭࢉɾ ੜ੒ Triggered

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΄΅ αʔόʔϨε ΞʔΩςΫνϟ

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Ϧίϝϯυ݁Ռ͕ ϦΞϧλΠϜͰੜ੒͞ΕΔ

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΄Ͳɺ ؁͘͸ͳ͔ͬͨʂʂ

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αʔόʔϨε͸  ເͷπʔϧͰ͸ͳ͔ͬͨ

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αʔόϨεʹର͢Δޡղ w ύϑΥʔϚϯε⬆ w ΦϖϨʔγϣϯίετ⬇

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αʔόϨεʹର͢Δޡղ w ύϑΥʔϚϯε⬆ w ΦϖϨʔγϣϯίετ⬇ ❌ ❌

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ύϑΥʔϚϯε

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ύϑΥʔϚϯε໰୊ ϢʔβΞΫςΟϏςΟ ϨʔςΟϯάσʔλ ෼ؒͷΞΫςΟϏςΟ͕ ࣌ؒͨͬͯ΋ॲཧͰ͖ͳ͍ ໿݅NJO

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Ͳ͏͔ͨ͠ʁ

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ղܾํ๏ ,JOFTJT 4USFBNT 1VU3FDPSETͰϦΫΤετΛ·ͱΊΔ -BNCEB ϝϞϦઃఆͰϦιʔεΛ૿΍͢ %ZOBNP%# #BUDIXSJUFͰ·ͱΊͯॻ͖ࠐΈ

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1VUSFDPSETͰ·ͱΊͯϦΫΤετ Put record Put records #FGPSF "GUFS

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ϝϞϦઃఆ͸ίϯϐϡʔςΟϯάϦιʔεͷઃఆ .# .#

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#BUDIXSJUFͰҰׅอଘ Put item Batch write item #FGPSF "GUFS

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ύϑΥʔϚϯε վળ✨

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ΦϖϨʔγϣϯ ίετ

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'VODUJPO਺ͷ૿Ճ໰୊ ॲཧͷ୯७Խ͍ͨ͠ 'VODUJPO਺ͷ૿Ճ ؅ཧ͖͠Εͳ͍ ιʔείʔυ؅ཧͱ'VODUJPO਺ͷ τϨʔυΦϑΛղܾ͢Δ

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ετϦʔϜίϯγϡʔϚ໰୊ ετϦʔϜͱίϯγϡʔϚͷόϥϯεΛͱΔ 3FBE1SPWJTJPOFE 5ISPVHIQVU&YDFFEFE͕ ൃੜ͠΍͘͢ͳΔ ετϦʔϜ਺ͷ૿Ճ ؅ཧ͖͠Εͳ͍ ίετ૿

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Ͳ͏͔ͨ͠ʁ

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ղܾํ๏ -BNCEB ετϦʔϜͷ൑ผʹΑΓɺ -BNCEBΛ࡟ݮ͢Δ ,JOFTJT 4USFBNT ֨ೲ͢ΔύϥϝʔλΛ޻෉ͯ͠ɺ  4USFBNͱ-BNCEBΛ࡟ݮ͢Δ

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ετϦʔϜͷ ൑ผ✨

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ҟͳΔετϦʔϜ͔Β ಉ͡Α͏ͳॲཧΛ͍ͤͨ͞έʔε ͲͷετϦʔϜ͔Λ൑ผ͠ɺॲཧΛ෼ذ -BNCEBΛ·ͱΊɺετϦʔϜΛ൑ผ { ‘eventSource’: ‘aws:kinesis’, ‘eventSourceARN’: ‘arn:aws:kinesis:Stream1’, } { ‘eventSource’: ‘aws:dynamodb’, ‘eventSourceARN’: ‘arn:aws:dynamodb:xxxx’, } { ‘eventSource’: ‘aws:kinesis’, ‘eventSourceARN’: ‘arn:aws:kinesis:Stream2’, }

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ύϥϝʔλΛ ޻෉✨

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ಉ͡ύϥϝʔλͰ ҟͳΔॲཧΛ͍ͤͨ͞έʔε {‘data’: 1} {‘data’: 1} {‘data’: 1} {‘key’: ‘func1’, ’data’: 1} {‘key’: ‘func2’, ’data’: 1} {‘key’: ‘func3’, ’data’: 1} ύϥϝʔλʹΑΓॲཧΛ෼ذ {’data’: 1} 4USFBNΛॻ͖໭͢ ෼਎ͷज़

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࠷খݶͰ ؅ཧ͠΍͘͢✨

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w ύϑΥʔϚϯε⬆ w ΦϖϨʔγϣϯίετ⬇

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αʔόʔϨεԽ ϦΞϧλΠϜԽ

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lϦΞϧλΠϜz   ϦίϝϯσʔγϣϯΤϯδϯ

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Ϧίϝϯυσʔλ ચ͍ସ͑

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ϨʔςΟϯάσʔλ ͷ௠෗Խ ࢒Δ՝୊

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&JHIUຊαʔϏεଆͷσʔλߏ଄ͷมߋ σʔλෆ੔߹ͷൃੜ ϦίϝϯυΞϧΰϦζϜͷมߋ ݪҼ

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࣮ࡍʹൃੜ

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୭͕ "͞Μ 9͞Μ ୭ʹ #͞Μ :͞Μ ͭͳ͕Γঢ়ଶ ͭͳ͕͍ͬͯΔ ʜ ͍͍Ͷճ਺ ճ ʜ ϝοηʔδճ਺ ճ ʜ ౤ߘγΣΞճ਺ ճ ʜ '#ͭͳ͕Γ ͳ͠ ʜ ࠓ·Ͱؤுͬͯ஝ੵͨ͠΋ͷ͸ແʹؐΔ ❌ ALTER TABLE ͱ͔ͳ͍ͷͰ

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Ͳ͏͔ͨ͠ʁ

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શաڈϩάΛूܭͯ͠ ϨʔςΟϯάσʔλΛ ࡞Γ௚͢✨

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%BUB1JQFMJOFΛར༻ چςʔϒϧ  ෆཁʹͳͬͨΒ࡟আ ৽ςʔϒϧ 3FETIJGU ❌ Redshift Copy Activity Hive Activity ૯*UFN਺ສ௒ 8SJUF$BQBDJUZ ʹઃఆͯ͠ ਺͔͔࣌ؒΔ 

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γεςϜશମͰߟ͑Δͱ

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logging Streaming Triggered Write Send Message Polled Get Write Triggered Set Ϣʔβʔ ΞΫςΟϏςΟ Get Set 8FCαʔόʔ #BUDIαʔόʔ Ϧίϝϯυ ݁Ռ Triggered Triggered

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logging Streaming Triggered Write Send Message Polled Get Write Triggered Set Ϣʔβʔ ΞΫςΟϏςΟ Get Set 8FCαʔόʔ #BUDIαʔόʔ Ϧίϝϯυ ݁Ռ Triggered Triggered -BNCEBఀࢭ

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logging Streaming Triggered Write Send Message Polled Get Write Triggered Set Ϣʔβʔ ΞΫςΟϏςΟ Get Set 8FCαʔόʔ #BUDIαʔόʔ Ϧίϝϯυ ݁Ռ Triggered Triggered -BNCEBఀࢭ ৽σʔλੜ੒

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logging Streaming Triggered Write Send Message Polled Get Write Triggered Set Ϣʔβʔ ΞΫςΟϏςΟ Get Set 8FCαʔόʔ #BUDIαʔόʔ Ϧίϝϯυ ݁Ռ Triggered Triggered -BNCEBఀࢭ Replace ςʔϒϧೖΕସ͑ ৽σʔλੜ੒

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logging Streaming Triggered Write Send Message Polled Get Write Triggered Set Ϣʔβʔ ΞΫςΟϏςΟ Get Set 8FCαʔόʔ #BUDIαʔόʔ Ϧίϝϯυ ݁Ռ Triggered Triggered -BNCEBఀࢭ Replace ςʔϒϧೖΕସ͑ -BNCEB࠶։ ৽σʔλੜ੒ Ωϟογϡ ɹ΢ΥʔϜΞοϓ

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৺ଁόΠύεखज़ͷΑ͏

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͔͠΋

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ର৅͸ςʔϒϧଘࡏ ࢦఆͨ͠΋ͷ͚ͩચ͍ସ͍͑ͨ ϨʔςΟϯάσʔλ  *UFN਺໿ສ ϨʔςΟϯάσʔλ *UFN਺໿ສ ϨʔςΟϯάσʔλ  *UFN਺໿ສ

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͜Μͳͷ खͰ ΍ͬͯΒΕͳ͍

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μ΢ϯλΠϜແ͠Ͱߦ͏ʹ͸ ϫʔΫϑϩʔ؅ཧ͕ඞਢ

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αʔόʔϨεͰઈର׬͍݁ͨ͠

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ࡢ೥ ݄

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ح੻తͳλΠϛϯάͰ ਆΞοϓσʔτʂʂ

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4UFQ'VODUJPOT✨

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ෳ਺ͷ-BNCEBॲཧΛ·ͱΊͯ ϫʔΫϑϩʔ؅ཧͰ͖ΔΑ͏ʹ͢ΔαʔϏε

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%BUB1JQFMJOF͸ ׆͔͍ͨ͠

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0O %BUB1JQFMJOF 4UFQ'VODUJPOT αʔόʔϨεͰσʔλચ͍ସ͑

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՝୊ w 4UFQ'VODUJPOT͔Β%BUB1JQFMJOFͷঢ়ଶ؅ཧ w -BNCEBͷ5JNFPVU໰୊ w ચ͍ସ͑ର৅ςʔϒϧͷࢦఆํ๏ w Ωϟογϡͷ΢ΥʔϜΞοϓ໰୊ w μ΢ϯλΠϜແ͠Ͱચ͍ସ͑

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Ͳ͏͔ͨ͠ʁ

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ղܾํ๏ %BUB1JQFMJOFͷঢ়ଶ؅ཧ %BUB1JQFMJOFͷঢ়ଶΛอ࣋ -BNCEBͷ5JNFPVU໰୊ 3FUSZΛ׆༻ ચ͍ସ͑ର৅ςʔϒϧͷ ࢦఆํ๏ 1BSBMMFM$IPJDFΛ׆༻ Ωϟογϡͷ ΢ΥʔϜΞοϓ໰୊ ɹɹͰߴ଎ʹ΢ΥʔϜΞοϓ μ΢ϯλΠϜແ͠Ͱ ચ͍ସ͑ "U5JNFTUBNQࢦఆͰτϦΨʔઃఆ

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%BUB1JQFMJOFͷ ঢ়ଶ؅ཧ

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4UFQ'VODUJPOT ಺෦ͷঢ়ଶ͔͠஌Βͳ͍ Step1 Step2 Step3 ❓

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%ZOBNP%#ʹ %BUB1JQFMJOFͷ׬ྃঢ়ଶΛ࣋ͨͤΔ Activate Alarm Trigger Put record Polling Step1 Step2 Step3 %BUB1JQFMJOFঢ়ଶอ࣋ςʔϒϧ

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-BNCEBͷ λΠϜΞ΢τ໰୊

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Step1 Step2 Step3 σʔλͷΠϯϙʔτʹ ਺͔͔࣌ؒΔ λΠϜΞ΢τൃੜ

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׬͍ྃͯ͠ͳ͍৔߹͸ Τϥʔѻ͍ͱ͠ɺఆִؒͰϦτϥΠ Polling "Retry" : [{ "ErrorEquals": [ "States.ALL" ], "IntervalSeconds": 300, "MaxAttempts": 100, "BackoffRate": 1.0 }], If: error Step1 Step2 Step3 else: success %BUB1JQFMJOF ঢ়ଶอ࣋ςʔϒϧ Retry

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ચ͍ସ͑ର৅ͷ ࢦఆํ๏

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Choice Choice Choice Parallel 1BSBMMFMΛ࢖༻͠ฒྻʹ $IPJDFͰॲཧΛ෼ذ ϨʔςΟϯά ςʔϒϧ ϨʔςΟϯά ςʔϒϧ ϨʔςΟϯά ςʔϒϧ

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ೖྗ͢Δ+40/Λ޻෉͠ɺ ࢦఆςʔϒϧͷΈચ͍ସ͑ Choice Choice Choice Parallel { "RatingTable1": false, "RatingTable2": true, "RatingTable3": false }

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Ωϟογϡͷ ΢ΥʔϜΞοϓ໰୊

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Ϣʔβʔ ΞΫςΟϏςΟ 8FCαʔόʔ Ϧίϝϯυ ݁Ռ Get %ZOBNP%#ʹ ϑΣʔϧΦʔόʔ ❌ 4MPXEPXO⬇ Get Item ΢ΥʔϜΞοϓ ͍ͯ͠ͳ͍ͱ

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%BUB1JQFMJOF %ZOBNP%#4USFBN -BNCEB✨

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ΩʔσʔλΛ ҰׅΠϯϙʔτ͠ɺ ετϦʔϜʹҰؾʹྲྀ͢ %ZOBNP%#4USFBNܦ༝Ͱ ΩϟογϡΛͻͨ͢Βߴ଎ੜ੒ Triggered Caching [ :key1, :key2, :key3, :key4, ], Rating data table )BTILFZ DPVOU TDPSF LFZ LFZ LFZ LFZ Get by :key1 {hash_key: :key1, count:1, score:1} -BNCEB͕ෳ਺ىಈ ΢ΥʔϜΞοϓ༻  ςϯϙϥϦςʔϒϧ

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μ΢ϯλΠϜແ͠ Ͱચ͍ସ͑

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-BNCEBఀࢭલ -BNCEB࠶։ޙ શաڈϩά͔Β%BUB1JQFMJOFͰ ϨʔςΟϯάσʔλΛҰׅੜ੒ ετϦʔϜ͔Β-BNCEBͰ ϨʔςΟϯάσʔλΛ౎౓ੜ੒

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"U5JNFTUBNQͰτϦΨʔઃఆ Latest Oldest refreshed_at Starting Position: At Timestamp = refreshed_at ࢦఆ࣌ࠁ SFGSFTIFE@BU ΑΓ΋ ৽͍͠΋ͷΛॲཧ

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σʔλҰׅੜ੒ͱ-BNCEBॲཧ ͷ଍ฒΈΛἧ͑Δ SFGSFTIFE@BU SFGSFTIFE@BU Starting Position:   At Timestamp import all put each

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͍ͭʹ શࣗಈԽ

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ࣄલ४උ  ɾ-BNCEBఀࢭ ϨʔςΟϯάσʔλચ͍ସ͑ ɾ৽σʔλҰׅੜ੒  ɾ%ZOBNP%#ςʔϒϧ࡞੒  ɾσʔλΠϯϙʔτ ɾςʔϒϧ੾Γସ͑ Ωϟογϡ΢ΥʔϜΞοϓ ɾϋογϡΩʔςʔϒϧ࡞੒ ɾϋογϡΩʔΠϯϙʔτ ɾ΢ΥʔϜΞοϓ࣮ߦ ࣄޙॲཧ  ɾ-BNCEB࠶։ ɾෆཁϦιʔε࡟আ

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w ܭສ݅ w ໿࣌ؒ

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ΞʔΩςΫνϟͷ શ๴͕

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logging Streaming Triggered Write Send Message Polled Get Write Triggered Set Ϣʔβʔ ΞΫςΟϏςΟ Get Set 8FCαʔόʔ #BUDIαʔόʔ Ϧίϝϯυ ݁Ռ Triggered Triggered Replace σʔλચ͍ସ͑ػߏ 4UFQ'VODUJPOT