機械学習によるマーケット健全化施策を支える技術

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1. ػցֶशʹΑΔϚʔέοτ ݈શԽࢪࡦΛࢧ͑Δٕज़ Mercari Server Side Tech Talk Vol.2 ʙCREφΠτʙ
 
 hnakagawa

2. ࣗݾ঺հ • Hirofumi Nakagawa (hnakagawa) • 2017೥7݄ೖࣾ • ॴଐ͸SRE • σόΠευϥΠό։ൃ͔Βϑϩϯ τΤϯυ։ൃ·Ͱ΍ΔԿͰ΋԰ • NOT MLΤϯδχΞ • https://github.com/hnakagawa
3. ͓࢓ࣄ • ML Platform։ൃ • MLΤϯδχΞͱSREͷεΩϧΪϟοϓΛຒΊ Δ • ML Reliability, SysML?, MLOps? • SREͷཱ৔͔ΒCREνʔϜΛॿ͚Δ
4. ML Platform • ಺੡ͷML Platform • kubernetesϕʔε • ϩʔΧϧ؀ڥͱΫϥελ؀ڥͷ ࠩΛந৅Խ͢Δ • ศརAPI܈ • طଘͷML FrameworkΛ࢖༻͠ ؆୯ʹTraining/ServingΛߦ͏ ؀ڥΛఏڙ
5. ͦͷ͏ͪOSSͰެ։༧ఆ(ଟ෼
6. ࠓ೔ͷAgenda͸
 ϦΞϧλΠϜ঎඼؂ࢹγεςϜ
7. ϦΞϧλΠϜ঎඼؂ࢹγεςϜ • ௨শ Lovemachine • ML Platform্ʹ࣮૷͞Ε͍ͯΔ .-
   1MBUGPSN
   USBJOJOH
   DMVTUFS -PWFNBDIJOF ($4 GKE PubSub .-
   1MBUGPSN
   TFSWJOH
   DMVTUFS -PWFNBDIJOF
8. ML ModelͷServing….?
9. Model Serving APIͷߏ੒ྫ 5FOTPS'MPX
 4FSWJOH 5'
   .PEFM 5'
   .PEFM 'MBTL 4,
 .PEFM 4,
 .PEFM 4,
 .PEFM gRPC .FSDBSJ
   "1* REST FlaskͰલॲཧΛߦ͍
 ཪͷTensorFlow Servingʹ౤͍͛ͯΔ
10. Model Serving API
 Streaming ver ͷߏ੒ྫ 5FOTPS'MPX
 4FSWJOH 5'
    .PEFM 5'
    .PEFM .-
    1MBUGPSN
    'SBNFXPSL
    
 PS
 "QBDIF
    #FBN
 4,
 .PEFM 4,
 .PEFM 4,
 .PEFM gRPC PubSub
11. TensorFlow Serving • TensorFlow project͕ఏڙͯ͠ ͍ΔServing؀ڥ • PythonॲཧܥΛհͣ͞ʹTFͷ modelΛservingͰ͖Δ • ඪ४ͷ࣮૷Ͱ͸gRPCͰAPIΛ ఏڙ
12. ModelͱίϯςφɾΠϝʔδ • ڊେͳML ModelΛίϯςφɾΠϝʔδʹؚΊ Δ͔൱͔ • ؚΊͳ͍ͷͰ͋Ε͹Կॲʹ഑ஔ͢Δ͔ • ϙʔλϏϦςΟੑͱϩʔυ࣌ؒͷτϨʔυΦϑ • ྑ͍ΞΠσΟΞ͕͋Ε͹ڭ͑ͯԼ͍͞…
13. ௨ৗͷAPIͱ͸ҧ͏ • ѻ͏ϦιʔεɺModelαΠζ͕େ͖͘ͳΔ৔ ߹͕ଟ͍(਺ඦMBʙ਺GB) • CPUɾϝϞϦϦιʔεͷফඅ͕ܹ͍͠ • ৔߹ʹΑͬͯ͸GPU΋࢖͏
14. ϝϞϦফඅ໰୊ • LovemachineͷPython࣮૷෦෼͸࣮ߦ࣌ʹ໿ 2GBϝϞϦΛফඅ͢Δˠࠓޙ͞Βʹ૿͑Δ༧ ఆ΋͋Δ • Scikit-learnͰهड़͞ΕͨTF-IDF౳ͷલॲཧ෦ ෼͕େ͖͘ͳΔࣄ͕ଟ͍
15. Pythonͱฒྻੑ • ౰વThread͕࢖͑ͳ͍(GILͷͨΊ) • ϓϩηεຖʹModelΛϩʔυ͢Δͱඞཁͳϝ ϞϦαΠζ͕େ͖͘ͳΔˠ Blue-Green Deployͷো֐ʹͳΔ
16. ਖ਼௚PythonͰͷServing͸
 Πϯϑϥతʹਏ͍ࣄ͕ଟ͍…
17. ϝϞϦΛݡ͘࢖͏ • fork͢ΔલʹmodelΛϩʔυ͠Copy on Write Λޮ͔͢ • k8sͷone process per containerηΦϦ͸͋ ͑ͯഁ͍ͬͯΔ
18. Copy On Writeͷ෮श ϝϞϦ ਌ϓϩηε ࢠϓϩηε 2.fork 1BHF
    " 1.allocation ಉ͡ྖҬΛࢀর
19. ϓϩηε͕ϝϞϦͷ಺༰Λ
 ॻ͖׵͑Δͱ… ϝϞϦ ਌ϓϩηε ࢠϓϩηε 1BHF
    " 1BHF
    # OS͕ผͷྖҬΛAllocationͯ͠ݩσʔλΛίϐʔ͢Δ ผͷྖҬΛࢀর
20. Current Issues • Mercari APIͱͷͭͳ͗ࠐΈʹۤ࿑
 ˠ Ұ௨Γ࡞Ε͹ޙ͸࠶ར༻Ͱ͖Δ͸ͣ • ਓؒͷߦಈΛ૬खʹ͍ͯ͠Δҝɺσʔλͷ܏޲͕ม ΘΓ΍͔ͬͨ͢Γɺ༧૝֎ͷ໰୊͕ൃੜͨ͠Γͯ͠ɺ ରԠ͠ଓ͚Δඞཁ͕͋Δ
 ˠ ML Model࡞੒ऀʹෛ୲ֻ͕͔Γଓ͚Δ
 ˠ SREͱͯ͠͸ࣗಈԽΛؚΜͩ࢓૊ΈͰղܾ͍ͨ͠
21. Future Plans • ࣾ಺ͷσʔλ͔Βಛ௃ྔΛநग़͢Δͯ͠ Embedding͢Δ൚༻ͷ࢓૊Έ
 ˠద౰ͳ෼ྨثͱ૊Έ߹ΘͤΕ͹ɺ୭Ͱ΋ͦͦ͜ ͜ͷ෼ྨϞσϧΛ࡞੒Ͱ͖Δ?
 →FBLearner Flowతͳ΍ͭ? • ࣾ಺ͷ໰୊ղܾʹಛԽͨ͠ઐ༻ͷAutoMLతͳԿ ͔?
22. ·ͱΊ • ML ModelͷServingʹ͸ɺগ͠௨ৗͱҧ͏Πϯϑ ϥ͕ඞཁʹͳΔ
 →·ͩϕετɾϓϥΫςΟε͸෼͔Βͳ͍ • ਓͷߦಈΛ૬खʹ͢Δͷ͸େม • ͦ΋ͦ΋MLͳػೳΛຊ֨ӡ༻͠Α͏ͱ͢Δͱɺେ ෯ͳࣗಈԽɾ࢓૊ΈԽΛਐΊͳ͍ͱ্ख͘ߦ͔ͳ ͍
23. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠!!
24. We are Hiring!!
25. SRE ML Reliability • SysML? MLOps? ৽͍͠Job description • SREεΩϧ+ML෼໺ͷجૅ஌ࣝ • MLΠϯϑϥͷࣗಈԽɾ࢓૊ΈԽΛਪ͠ਐΊͯ ͘ΕΔਓࡐ • ΋ͪΖΜଞͷ৬छ΋ઈࢍืूத!!
26. ৄࡉ͸ͪ͜Β
 https://careers.mercari.com/