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mlct.pdf

by Hirofumi Nakagawa/中河宏文

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ϝϧΧϦͷMLج൫ MLCT vol.5    hnakagawa 

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ࣗݾ঺հ • Hirofumi Nakagawa (hnakagawa) • 2017೥7݄ೖࣾ • ॴଐ͸SRE • σόΠευϥΠό։ൃ͔Βϑϩϯ τΤϯυ։ൃ·Ͱ΍ΔԿͰ΋԰ • NOT σʔλαΠΤϯςΟετ • https://github.com/hnakagawa

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͓࢓ࣄ • ML Platform։ൃ • σʔλαΠΤϯςΟετͱSREͷεΩϧΪϟο ϓΛຒΊΔ • ML Reliability, SysML?, MLOps? • SREͷཱ৔͔ΒMLγεςϜͷࣗಈԽΛߦ͏

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ML Platform • ಺੡ͷML Platform • kubernetesϕʔε • طଘͷML FrameworkΛ࢖༻͠ ؆୯ʹTraining/ServingΛߦ͏ ؀ڥΛఏڙ

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ͦͷ͏ͪOSSͰެ։༧ఆ(ଟ෼

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ϝϧΧϦͷMLར༻ࣄྫ • ײಈग़඼ • ҧ൓ग़඼ݕ஌ • Ձ֨αδΣετ • ΢ΤΠταδΣετ  ౳ʑ… ̍೔਺ઍສpredictionΛߦ͍ͬͯΔ

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ML Platform Architecture ,VCFSOFUFT $POUSPMMFS $-* $MVTUFS8PSLGMPX %BTICPBSE 4UPSBHF(BUFXBZ .FUSJDT 3VOOFS $PNQPOFOU .FSDBSJ.- $PNQPOFOU &YUFSOBM .JEEMFXBSF

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Model Training & Serving  Workflow

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.-1MBUGPSN USBJOJOHDMVTUFS Workflow for Production $* .-1MBUGPSN TFSWJOHDMVTUFSGPSUFTU .PEFM3FHJTUSZ +PC +PC ɾɾ 3&45  "1* 4USFBNJOH 5'4FSW JOH ɾɾɾ

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.-1MBUGPSN USBJOJOHDMVTUFS Training Workflow $* .PEFM3FHJTUSZ +PC +PC ɾɾɾ 1. GitHub΁ͷpushΛτϦΨʹtrainingΛىಈ 2. Training͞ΕͨModel͸Model Registry  ΁্͕Δ

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Serving Workflow .-1MBUGPSN TFSWJOHDMVTUFSGPSUFTU .PEFM3FHJTUSZ ɾɾ 3&45  "1* 4USFBNJOH 5' 4FSWJOH 1. Model RegistryΛ؂ࢹͯࣗ͠ಈͰModel ΛServing 2. Serving&Test͕੒ޭ͢Δͱຊ൪༻k8s manifestΛग़ྗ

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Container Workflow %BUB4PVSDF  *NBHF 5FYUɹ 1SFQSPDFT TJOH *NBHF &TUJNBUPS  *NBHF 17 17 1JDUVSF 1SFQSPDFT TJOH *NBHF 17 It’s own implementation

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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

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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

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ModelͱίϯςφɾΠϝʔδ • ڊେͳML ModelΛίϯςφɾΠϝʔδʹؚΊ Δ͔൱͔ • ؚΊͳ͍ͷͰ͋Ε͹Կॲʹ഑ஔ͢Δ͔ • ϙʔλϏϦςΟੑͱϩʔυ࣌ؒͷτϨʔυΦϑ • ྑ͍ΞΠσΟΞ͕͋Ε͹ڭ͑ͯԼ͍͞…

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௨ৗͷAPIͱಛੑ͕ҧ͏ • ѻ͏ϦιʔεɺModelαΠζ͕େ͖͘ͳΔ৔ ߹͕ଟ͍(਺ඦMBʙ਺GB) • CPUɾϝϞϦϦιʔεͷফඅ͕ܹ͍͠ • ৔߹ʹΑͬͯ͸GPU΋࢖͏

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ϝϞϦফඅ໰୊ • ҧ൓ݕ஌γεςϜͷPython࣮૷෦෼͸࣮ߦ࣌ ʹ໿2GBϝϞϦΛফඅ͢Δˠࠓޙ͞Βʹ૿͑ Δ༧ఆ΋͋Δ • Scikit-learnͰهड़͞Εͨલॲཧ෦෼͕େ͖͘ ͳΓ͕ͪ

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

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ਖ਼௚PythonͰͷServing͸  Πϯϑϥతʹਏ͍ࣄ͕ଟ͍…

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ϝϞϦΛݡ͘࢖͏ • fork͢ΔલʹmodelΛϩʔυ͠Copy on Write Λޮ͔͢ • k8sͷone process per containerηΦϦ͸͋ ͑ͯഁ͍ͬͯΔ

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

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

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Current Issues

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ߴ౓ͳܧଓతϝϯςφϯε͕ඞཁ • MLػೳ͸σʔλͷ܏޲͕มΘͬͨΓɺ༧૝֎ ͷ໰୊͕ൃੜͨ͠Γͯ͠ɺͦΕΒʹରԠ͠ଓ ͚Δඞཁ͕͋Δ MLػೳ͸ϦϦʔεޙ΋େ͖ͳ ίετ͕͔͔Γଓ͚Δ

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େ෯ͳࣗಈԽ͕ඞਢ

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In Progress

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ߴ౓ͳࣗಈԽ • ࣾ಺ͷσʔλ͔ΒFeature Extraction͢Δ࣮૷ ΛίϯϙʔωϯτԽ • ಛఆͷ໰୊Λղܾ͢ΔϞσϧߏஙΛ͋Δఔ౓ ࣗಈԽ • ϦϦʔεޙͷRe-TrainingɺHyper parameter optimizationɺDeploy౳ΛࣗಈԽ

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AutoFlow 'FBUVSF&YUSBDUJPO $PNQPOFOUT $MBTTJGJDBUJPO $PNQPOFOUT $PODBUFOBUJPO  $PNQPOFOUT .PEFM #VJMEFS $PNQPOFOUT 3FHJTUSZ Ϋϥελ্ͰϞσϧͷ൒ࣗಈߏஙͱϋΠύʔύϥ ϝʔλͷࣗಈௐ੔Λߦ͏

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AutoServing %FQMPZ ϦϦʔεޙͷਫ਼౓؂ࢹɾRe-TrainingɾRe-Deploy౳ ΛࣗಈͰߦ͏ .POJUPSJOH &WBMVBUJPO )ZQFS QBSBNFUFS PQUJNJ[BUJPO 3F5SBJOJOH

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

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠!!