メルカリのマーケット健全化施策を支えるML基盤

Transcript

1. ϝϧΧϦͷϚʔέοτ݈શԽ ࢪࡦΛࢧ͑ΔMLج൫ Mercari ML Ops Night Vol.1
 
 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৔͔ΒMLγεςϜͷࣗಈԽΛߦ͏

4. ML Platform • ಺੡ͷML Platform • kubernetesϕʔε • ϩʔΧϧ؀ڥͱΫϥελ؀ڥͷ ࠩΛந৅Խ͢Δ

   • ศརAPI܈ • طଘͷML FrameworkΛ࢖༻͠ ؆୯ʹTraining/ServingΛߦ͏ ؀ڥΛఏڙ

5. ͦͷ͏ͪOSSͰެ։༧ఆ(ଟ෼

6. ࣄྫ ϦΞϧλΠϜ঎඼؂ࢹγεςϜ • ௨শ Lovemachine • ML Platform্ʹ࣮૷͞Ε͍ͯΔ .-
   1MBUGPSN
   USBJOJOH
   DMVTUFS

   -PWFNBDIJOF ($4 GKE PubSub .-
   1MBUGPSN
   TFSWJOH
   DMVTUFS -PWFNBDIJOF

7. Model Training & Serving
 Workflow

8. .-
   1MBUGPSN
   USBJOJOH
   DMVTUFS Workflow for Production $* .-
   1MBUGPSN
   TFSWJOH
   DMVTUFS
   GPS
   UFTU .PEFM
   3FHJTUSZ +PC

   +PC ɾɾ 3&45
 "1* 4USFBNJOH 5'
   4FSWJOH
 ɾɾɾ

9. .-
   1MBUGPSN
   USBJOJOH
   DMVTUFS Training Workflow $* .PEFM
   3FHJTUSZ +PC +PC ɾɾɾ 1.

   GitHub΁ͷpushΛτϦΨʹtrainingΛىಈ 2. Training͞ΕͨModel͸Model Registry
 ΁্͕Δ

10. Serving Workflow .-
    1MBUGPSN
    TFSWJOH
    DMVTUFS
    GPS
    UFTU .PEFM
    3FHJTUSZ ɾɾ 3&45
 "1* 4USFBNJOH 5'
    

    4FSWJOH
 ɾɾɾ 1. Model RegistryΛ؂ࢹͯࣗ͠ಈͰModel ΛServing 2. Serving&Test͕੒ޭ͢Δͱຊ൪༻k8s manifestΛग़ྗ

11. 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

12. 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

13. TensorFlow Serving • TensorFlow project͕ఏڙͯ͠ ͍ΔServing؀ڥ • PythonॲཧܥΛհͣ͞ʹTFͷ modelΛservingͰ͖Δ •

    ඪ४ͷ࣮૷Ͱ͸gRPCͰAPIΛ ఏڙ

14. ModelͱίϯςφɾΠϝʔδ • ڊେͳML ModelΛίϯςφɾΠϝʔδʹؚΊ Δ͔൱͔ • ؚΊͳ͍ͷͰ͋Ε͹Կॲʹ഑ஔ͢Δ͔ • ϙʔλϏϦςΟੑͱϩʔυ࣌ؒͷτϨʔυΦϑ •

    ྑ͍ΞΠσΟΞ͕͋Ε͹ڭ͑ͯԼ͍͞…

15. ௨ৗͷAPIͱ͸ҧ͏ • ѻ͏ϦιʔεɺModelαΠζ͕େ͖͘ͳΔ৔ ߹͕ଟ͍(਺ඦMBʙ਺GB) • CPUɾϝϞϦϦιʔεͷফඅ͕ܹ͍͠ • ৔߹ʹΑͬͯ͸GPU΋࢖͏

16. ϝϞϦফඅ໰୊ • LovemachineͷPython࣮૷෦෼͸࣮ߦ࣌ʹ໿ 2GBϝϞϦΛফඅ͢Δˠࠓޙ͞Βʹ૿͑Δ༧ ఆ΋͋Δ • Scikit-learnͰهड़͞ΕͨTF-IDF౳ͷલॲཧ෦ ෼͕େ͖͘ͳΔࣄ͕ଟ͍

17. Pythonͱฒྻੑ • ౰વThread͕࢖͑ͳ͍(GILͷͨΊ) • ϓϩηεຖʹModelΛϩʔυ͢Δͱඞཁͳϝ ϞϦαΠζ͕େ͖͘ͳΔˠ Blue-Green Deployͷো֐ʹͳΔ

18. ਖ਼௚PythonͰͷServing͸
 Πϯϑϥతʹਏ͍ࣄ͕ଟ͍…

19. ϝϞϦΛݡ͘࢖͏ • fork͢ΔલʹmodelΛϩʔυ͠Copy on Write Λޮ͔͢ • k8sͷone process per

    containerηΦϦ͸͋ ͑ͯഁ͍ͬͯΔ

20. Copy On Writeͷ෮श ϝϞϦ ਌ϓϩηε ࢠϓϩηε 2.fork 1BHF
    " 1.allocation ಉ͡ྖҬΛࢀর

21. ϓϩηε͕ϝϞϦͷ಺༰Λ
 ॻ͖׵͑Δͱ… ϝϞϦ ਌ϓϩηε ࢠϓϩηε 1BHF
    " 1BHF
    # OS͕ผͷྖҬΛAllocationͯ͠ݩσʔλΛίϐʔ͢Δ ผͷྖҬΛࢀর

22. Current Issues • ਓؒͷߦಈΛ૬खʹ͍ͯ͠Δҝɺσʔλͷ܏ ޲͕มΘΓ΍͔ͬͨ͢Γɺ༧૝֎ͷ໰୊͕ൃ ੜͨ͠Γͯ͠ɺରԠ͠ଓ͚Δඞཁ͕͋Δ
 ˠ ML Model࡞੒ऀʹෛ୲ֻ͕͔Γଓ͚Δ
 ˠ

    SREͱͯ͠͸ࣗಈԽΛؚΜͩ࢓૊ΈͰղܾ ͍ͨ͠

23. In Progress • ࣾ಺ͷσʔλ͔ΒEmbedding͢Δ࣮૷Λίϯ ϙʔωϯτԽ • ಛఆͷ໰୊Λղܾ͢ΔϞσϧߏஙΛ͋Δఔ౓ ࣗಈԽ
 ˠࣾ಺ͷ໰୊ղܾʹಛԽͨ͠ઐ༻ͷAutoMLత ͳԿ͔

24. AutoFlow(Ծ) 'FBUVSF
    &YUSBDUJPO
    $PNQPOFOUT $MBTTJpDBUJPO
    $PNQPOFOUT $PODBUFOBUJPO
 $PNQPOFOUT .PEFM
    #VJMEFS $PNQPOFOUT
    

    3FHJTUSZ Ϋϥελ্ͰϞσϧͷ൒ࣗಈߏஙͱϋΠύʔύϥ ϝʔλͷࣗಈௐ੔Λߦ͏

25. ·ͱΊ • MLʹ͸গ͠௨ৗͱҧ͏Πϯϑϥ͕ඞཁʹͳΔ
 ˠ·ͩϕετɾϓϥΫςΟε͸෼͔Βͳ͍ • ͦ΋ͦ΋MLͳػೳΛຊ֨ӡ༻͠Α͏ͱ͢Δ ͱɺେ෯ͳࣗಈԽɾ࢓૊ΈԽΛਐΊͳ͍ͱ্ ख͘ߦ͔ͳ͍

26. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠!!

27. We are Hiring!!

28. SRE ML Reliability • SysML? MLOps? ৽͍͠Job description • SREεΩϧ+ML෼໺ͷجૅ஌ࣝ

    • MLΠϯϑϥͷࣗಈԽɾ࢓૊ΈԽΛਪ͠ਐΊͯ ͘ΕΔਓࡐ • ΋ͪΖΜଞͷ৬छ΋ઈࢍืूத!!

29. ৄࡉ͸ͪ͜Β
 https://careers.mercari.com/