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Apache Spark による推薦システム案件例
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soonraah
March 21, 2015
Technology
8.2k
11
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Apache Spark による推薦システム案件例
2015-03-21 #TokyoWebmining 44th の発表資料です。
soonraah
March 21, 2015
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Transcript
"QBDIF4QBSLʹΑΔ ਪનγεςϜҊ݅ྫ 5PLZP8FCNJOJOH !TPPOSBBI
"(&/%" • Ҋ݅֓ཁ • γεςϜ֓ཁ • ਪનΞϧΰϦζϜ • ӡ༻ •
·ͱΊ 2
ਪનγεςϜ 3 Ҿ༻BNB[PODPKQ
Ҋ݅֓ཁ • &$αΠτ͚ͷਪનγεςϜʢडୗ։ൃʣ • ࣍ͷόονॲཧͰશରϢʔβ͚ͷਪન݁ՌΛఏڙ • छྨͷਪન݁ՌΛఏڙ • ඪαΠτച্૿Ճ 4
نײ • Γ͍ͨ͜ͱ • ձһϢʔβສ໊ͷݸਓݸਓʹ • ສͷͷத͔Β • ਪનϦετΛੜ •
ֶशσʔλ • Ӿཡϩάʙԯ݅ ˞ࣈʹएׯϑΣΠΫ͕͋Γ·͢ɻ 5
"QBDIF4QBSL • ߴɾ൚༻ͷΦϯϝϞϦࢄॲཧ • 6$#FSLFMFZͰ։ൃ͞Εɺڈ͔Β"QBDIFͷτοϓϨϕϧ 1+ʹ • )BEPPQ:"3/"QBDIF.FTPTͷ্Ͱ࣮ߦՄೳ • 4DBMB
+BWB 1ZUIPOͷ"1*Λఏڙ 6
4QBSLϥΠϒϥϦ 7 Ҿ༻IUUQTTQBSLBQBDIFPSH
.-MJC • ࣮͞Ε͍ͯΔΞϧΰϦζϜʢࣈͰԼઢWͰՃʣ • MJOFBS47.BOEMPHJTUJDSFHSFTTJPO • DMBTTJpDBUJPOBOESFHSFTTJPOUSFF • DMVTUFSJOH LNFBOT
(.. QPXFSJUFSBUJPODMVTUFSJOH FUD • SFDPNNFOEBUJPOWJBBMUFSOBUJOHMFBTUTRVBSFT ޙड़ • TJOHVMBSWBMVFEFDPNQPTJUJPO • MJOFBSSFHSFTTJPOXJUI-BOE-SFHVMBSJ[BUJPO • NVMUJOPNJBMOBJWF#BZFT • CBTJDTUBUJTUJDT • GFBUVSFUSBOTGPSNBUJPOT • -%"GPSUPQJDNPEFMJOH • '1HSPXUIGPSGSFRVFOUQBUUFSONJOJOH 8
"(&/%" • Ҋ݅֓ཁ • γεςϜ֓ཁ • ਪનΞϧΰϦζϜ • ӡ༻ •
·ͱΊ 9
ސ٬ &$αΠτ γεςϜ γεςϜߏ 10 &.3 ϩάऩू༻XFCαʔό δϣϒཧαʔό ϑΝΠϧ࿈ܞαʔό 4
ϩάੵ ਪન݁Ռ ਪન݁Ռ
ਪનγεςϜ ΞϓϦέʔγϣϯͷ࣮ߦ 4 Ӿཡϩά &$ δϣϒཧαʔό &.3 &MBTUJD.BQ3FEVDF ᶄ&.3δϣϒ։࢝
ᶃαʔόଆΞϓϦىಈ ᶆΫϥελىಈ Ϋϥελ ᶇ4QBSLڥ༻ҙ ᶈӾཡϩάऔಘ ᶉਪનԋࢉ ᶊԋࢉ݁Ռ 11
"(&/%" • Ҋ݅֓ཁ • γεςϜ֓ཁ • ਪનΞϧΰϦζϜ • ӡ༻ •
·ͱΊ 12
ͭͷਪનΞϧΰϦζϜ • ༰ϕʔεϑΟϧλϦϯά • ϢʔβͷଐੑͷಛΛ༻͍Δํ๏ • ڠௐϑΟϧλϦϯά • ͦΕΒಛΘͣɺϢʔβίϛϡχςΟͷ ᅂσʔλͷΈΛ༻͍Δํ๏
13
༰ϕʔεϑΟϧλϦϯάͷ ࣮ ສ݅ ಛສछྨ Ϣʔβ" ͲͷΞΠςϜ ͕࠷͍ۙʁ ✕ສਓ ಛྔ
14
༰ϕʔεϑΟϧλϦϯάͷ ࣮ ສ݅ ಛສछྨ Ϣʔβ" ͲͷΞΠςϜ ͕࠷͍ۙʁ ✕ສਓ ϚοϓܗࣜͷϕΫτϧදݱ
సஔ ΠϯσοΫε 4QBSLࢄॲཧ ಛྔ 15
ڠௐϑΟϧλϦϯάͷ࣮ • .-MJCͷPSHBQBDIFTQBSLSFDPNNFOEBUJPO"-4Λར༻ • ߦྻҼࢠղϞσϧʢ.BUSJY'BDUPSJ[BUJPO.PEFMʣΛ ަޓ࠷খೋ๏ʢ"-4"MUFSOBUJOH-FBTU4RVBSFʣͰֶश 16
ߦྻҼࢠղ • ϢʔβͷͷධՁΛϢʔβºͷߦྻͰද͢ • ͜ͷߦྻΛO G ݸͷಛΛ࣋ͭϢʔβಛྔߦྻͱಛྔ ߦྻͷੵͰද͢͜ͱΛతͱ͢Δ 17
ߦྻҼࢠղ 18
"-4 • ަޓ࠷খೋ๏ʢ"MUFSOBUJWF-FBTU4RVBSFʣ • ͭͷಛྔߦྻΛަޓʹֶश • 4QBSLͷಘҙͱ͢Δ܁Γฦ͠ॲཧ 19
"-4TUFQ Ϣʔβ ಛྔߦྻ ಛྔߦྻ ࠷ॳͷಛྔΛͦΕͧΕͷͷ ฏۉͷධՁͰॳظԽ ͦΕҎ֎ϥϯμϜͳ খ͍͞ͰॳظԽ 20
"-4TUFQ Ϣʔβ ಛྔߦྻ ಛྔߦྻ ֤Ϣʔβʹ͍ͭͯɺ ༧ଌͱ࣮ࡍͷධՁͷޡࠩΛ࠷খԽ ଆݻఆ 21
"-4TUFQ Ϣʔβ ಛྔߦྻ ಛྔߦྻ ֤ʹ͍ͭͯɺ ༧ଌͱ࣮ࡍͷධՁͷޡࠩΛ࠷খԽ Ϣʔβଆݻఆ ҎԼɺऩଋ͢Δ·ͰTUFQ Λ܁Γฦ͠
22
"(&/%" • Ҋ݅֓ཁ • γεςϜ֓ཁ • ਪનΞϧΰϦζϜ • ӡ༻ •
·ͱΊ 23
ຊҊ݅ʹ͓͚Δ Ϋϥελʹؔ͢Δࣈ • $16ίΞ • ϝϞϦ૯ܭ(# • &$Πϯελϯε • .BTUFSSYMBSHF
• 4MBWFDYMBSHF • ࣍ॲཧʙI 24
νϡʔχϯά • ΦϑϥΠϯධՁ • ."1ʢ.FBO"WFSBHF1SFDJTJPOʣʹΑΓ ϋΠύʔύϥϝʔλͷόϦΤʔγϣϯΛΦϑϥΠϯධՁ • ਪન݁ՌͱϢʔβͷߪങϩάΛॱҐΛߟྀͯ͠ൺֱ • ͜Ε4QBSLͰ࡞ͬͨ
• ΦϯϥΠϯධՁ • ϢʔβผʹϥϯμϜͰ • ཁ"#ςετ 25
"(&/%" • Ҋ݅֓ཁ • γεςϜ֓ཁ • ਪનΞϧΰϦζϜ • ӡ༻ •
·ͱΊ 26
4QBSL.-MJCΛҊ݅Ͱ ։ൃɾӡ༻ͯ͠Έͯᶃ • ͭΒ͍ • ޮͱඅ༻ͱϦιʔεͷύζϧ • ϋϚΓͲ͜Ζ͕͋Δ • &$Πϯελϯεधཁͷߴ·ΓͷઞΓΛड͚Δ
• ςετͷͭΒΈ 27
4QBSL.-MJCΛҊ݅Ͱ ։ൃɾӡ༻ͯ͠Έͯᶄ • Ͱ໘ന͍ • ίʔσΟϯάָ͕͍͠ʂ • γʔϜϨεʹࢄॲཧ͕ॻ͚Δ • )BEPPQΑΓগͳ͍ίʔυྔ
• ͍ • .-MJCͷਐԽʹظ 28
4QBSLΞϓϦέʔγϣϯ ։ൃͷצॴ • Ϧιʔε༗ݶ • ιʔεͷதͰಛʹԋࢉྔΛཁ͢Δ෦ϩʔΧϧͷ࣮ݧͰ ेʹ࠷దԽ͓ͯ͘͠ • ಉ͡ܭࢉ݁ՌΛಘΔͷʹΑΓޮతͳํ๏ͳ͍ͷ͔ʁ •
ίϨΫγϣϯΫϥεͷબ • ԋࢉ࣌ؒϝϞϦྔΛݟੵΔ • ܧଓతΠϯςάϨʔγϣϯΛڧ͘ҙࣝ͢Δ 29
·ͱΊ • "QBDIF4QBSL .-MJCͰ༰ϕʔεϑΟϧλϦϯά ͓ΑͼڠௐϑΟϧλϦϯάʹΑΔਪનγεςϜΛ ͭͬͨ͘ • &$αΠτͷ,1*ΛվળͰ͖ͨ • 4QBSLϓϩάϥϛϯάɺָ͍͔͠ΒͬͯΈͯΑʂ
30