Web API サーバーとしての Elixir の可能性

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8FC"1*αʔόʔͱͯ͠ͷ &MJYJSͷՄೳੑ /BPZB*UP ,BJ[FO1MBUGPSN *OD "1*.FFUVQ5PLZP

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ࡢࠓ͜Μͳ͜ͱ͋Γ·ͤΜ͔ •  ͨͩͷ+40/"1*ʹ3BJMTͰ͸ŋŋŋ –  ϋΠτϥϑΟοΫͳҊ݅Ͱ࢖͍ͮΒ͍ –  ཁ݅ʹରͯ͠ϝϞϦϑοτϓϦϯτ͕େ͖͗͢ –  ઀ଓ਺͕ଟ͍ͱεέʔϧ͠ͳ͍ –  ଱ো֐ੑʹෆ҆ •  ʮεύΠΫͨ͠ͷͰམͪ·ͨ͠ʯͰ͸ࡁ·͞Εͳ͍ɻ޿ࠂ αʔόʔͱ͔

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,BJ[FO1MBUGPSNͰ͸ŋŋŋ •  ҎԼͷέʔεͰ࣮ࡍʹ͋ͬͨ –  ޿ࠂ഑৴ͷ֎෦αʔόʔͱͷ΍ΓͱΓ •  ଟྔͷ઀ଓ –  3FEJTͱ*0ͯ͠ฦ౴͢Δ͚ͩͷ"1*αʔόʔ •  ཁ݅͸γϯϓϧɻෳࡶͳ.PEFM7JFXཁΒͳ͍ •  Ͱ΋εύΠΫͰམͱͨ͘͠ͳ͍ ͻͱ·ͣ/PEFKTͰ ରԠͨ͠

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親子 fork() ϚϧνϓϩηεϞσϧʹΑΔฒߦॲཧ ྫ3BJMTͷ࣮ߦ؀ڥ

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1SPT$POT •  1SPT –  ҆શ •  ϦΫΤετ͝ͱʹϝϞϦۭؒ෼཭㱺Ϋϥογϡͯ͠΋ ଞʹӨڹ͠ͳ͍ –  ϓϩάϥϛϯάϞσϧ͕୯७ ಉظͰ0, –  ϚϧνίΞ •  $POT –  εέʔϥϏϦςΟʹ೉ •  ϝϞϦେ㱺࠷େϓϩηε਺ಉ࣌ฒߦ਺্ݶ •  04ϓϩηεεϨουͷίϯςΩετεΠον

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࣌ؒ A B A C D B ・・・ select() / epoll() ίϯςΩετ εΠον ΠϕϯτۦಈϞσϧʹΑΔฒߦॲཧ ྫ&WFOU.BDIJOF /PEFKT

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1SPT$POT •  1SPT –  εέʔϥϏϦςΟ ߴ͍ฒߦॲཧੑೳ •  ϝϞϦϑοτϓϦϯτখ͍͞ •  ಉ࣌઀ଓ਺͕૿͑ͯ΋εέʔϧ •  $POT –  ଱ো֐ੑʹ೉ •  མͪΔͱ͖͸શ෦མͪΔ •  ϝϞϦϦʔΫ͜Θ͍ –  ϓϩάϥϛϯάϞσϧ͕΍΍ෳࡶ˞/PEFKTͩͱͦΕ΄ͲͰ΋ͳ͍ –  ϚϧνίΞ$16Λ࢖͍ͮΒ͍

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τϨʔυΦϑ •  ฒߦॲཧੑೳ͸Ք͛ͳ͍͕҆શͰ୯७ͳ Ϛϧνϓϩηε εϨου Ϟσϧ͔ •  ฒߦॲཧੑೳ͕ߴ͍͕ӡ༻ʹؾΛݣ͏Πϕ ϯτۦಈϞσϧ͔ ͙͵͵ŋŋŋ

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ͦ͜Ͱ&SMBOHͰ͢

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&SMBOHͷ࣮ߦ؀ڥ •  #&". &SMBOH7. – ܰྔϓϩηεŋŋŋ࣮ߦίϯςΩετ •  খ͍͞ϫʔυɺىಈʹdϚΠΫϩඵ – ฒߦॲཧੑೳ͕ߴ͍ •  7.͕ܰྔϓϩηεΛεέδϡʔϦϯά –  7.εϨουຖʹϥϯΩϡʔ –  ཪଆͰ͸ඇಉظεϨουϓʔϧ ref: h+p://www.erlang-‐factory.com/upload/presenta=ons/708/HitchhikersTouroEheBEAM.pdf

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ΞΫλʔϞσϧ ϝοηʔδύογϯά ஋͸͢΂ͯίϐʔ 4IBSFE/PUIJOH ϝʔϧϘοΫεʹ ΩϡʔΠϯά

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&SMBOHͰͷ ωοτϫʔΫαʔόʔ •  ϦΫΤετʹܰྔϓϩηε – ҆શ •  ܰྔϓϩηεŋŋŋಠཱ࣮ͨ͠ߦίϯςΩετ •  4IBSFE/PUIJOHŋŋŋ͋Δϓϩηε͕Ϋϥογϡ ͯ͠΋໰୊ͳ͍ – ߴ͍ฒߦॲཧੑೳ •  ܰྔŋŋŋϝϞϦϑοτϓϦϯτখ͍͞ •  Ϣʔβʔϥϯυ04ͷίϯςΩετεΠονͳ ͠

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&SMBOHͷϝϞϦϞσϧ •  QFS1SPDFTT($ –  ϓϩηεຖʹ($ •  άϩʔόϧ($ͩͱશମʹӨڹ͢Δ •  ϓϩηε෼཭ –  4IBSFE/PUIJOH –  ϓϩηε)FBQ •  ($͸ܰྔϓϩηεຖʹ૸ΒͤɺཁΒͳ͘ͳͬͨΒഇغ ؆ ୯Ͱޮ཰͕Α͍ ҆ఆͨ͠Ԡ౴ੑೳ ߴ͍଱ো֐ੑ

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4VQFSWJTPS Supervisor ϓϩηε ؂ࢹ ʮಥવͷࢮʂʯ ϓϩηεࢮΜͩ͠ɺઓུ ʹ߹Θͤͯ࠶ىಈ͠ͱ͘ Θ crash

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-FUJUDSBTI •  ࣦഊʹඋ͑ͳ͍ɻྫ֎Λั·͑ͳ͍ •  4VQFSWJTPSͰ؂ࢹ͓͍ͯͯ͠ɺͦͷ· ·ى͜͢ͳΓύϥϝʔλม͑ͯϦτϥΠ͞ ͤΔͳΓŋŋŋ ނোରԠϞσϧ͕ ݴޠج൫Ͱఏڙ

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/PEFKTWT&SMBOH •  /PEFKTWT&SMBOH –  IUUQLVFOJTIJIBUFOBEJBSZKQFOUSZ –  ނোϞσϧɺίʔυมߋɺίʔυҠಈɺແఀࢭΞοϓάϨʔυɺ ͜͏͍͏ͷͬͯYͰμ΢ϯλΠϜͷγεςϜͩͱେࣄͩΑ Ͷɻ +PF"SNTUSPOH –  ݁ہੑೳΑΓ΋ނো଱ੑͳΜͩΑͶᴷͦΕͳ

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Ͱ΋&SMBOHͳΜͰ͠ΐ͏

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ͦ͜Ͱ&MJYJS

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&MJYJS •  &SMBOH7.ͷ্Ͱಈ͘ݴޠ –  &SMBOH7.ͷڧΈ ฒߦॲཧੑೳɺ଱ো֐ੑ Λͦͷ··ʹɺγϯ λοΫεΛೃછΈ΍͘͢ •  KPTFWBMJN&SMBOHͰݟͨ͜ͱ͸ΈΜͳؾʹೖ͚ͬͨͲɺݟͳ͔ͬͨ͜ͱ ͸ΈΜͳݏ͍ –  &SMBOHͱ૬ޓޓ׵ –  051΋΋ͪΖΜ͋ΔΑ •  Ϟμϯͳύοέʔδ؅ཧγεςϜɺ-B[ZίϨΫγϣϯ 4USFBN ɺ ϓϩτίϧͳͲͷ௥Ճཁૉ •  ৄ͘͠͸ –  IUUQTTQFBLFSEFDLDPNOBPZBFMJYJSHPTIBPKJF

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Ͱ΋8FC"1*࡞Δͷ ೉͍͠ΜͰ͠ΐ͏

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1IPFOJYᴷ&MJYJSPO3BJMT

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1IPFOJY Cowboy Plug Phoenix .JEEMFXBSF )5514FSWFS &SMBOH1SPDFTT 3FFRVFTU

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ϕϯνϚʔΫ ref: h+p://www.li+lelines.com/blog/2014/07/08/elixir-‐vs-‐ruby-‐showdown-‐phoenix-‐vs-‐rails/ $ ./wrk -‐t12 -‐c800 -‐d180S -‐-‐timeout 2000 "http://tranquil-‐brushlands-‐6459.herokuapp.com/showdown" Running 3m test @ http://tranquil-‐brushlands-‐6459.herokuapp.com/showdown 12 threads and 800 connections Thread Stats Avg Stdev Max +/-‐ Stdev Latency 318.52ms 139.92ms 1.39s 82.03% Req/Sec 224.42 57.23 368.00 68.50% 484444 requests in 3.00m, 0.99GB read Socket errors: connect 0, read 9, write 0, timeout 0 Requests/sec: 2691.03 Transfer/sec: 5.65MB $ ./wrk -‐t12 -‐c800 -‐d180S -‐-‐timeout 2000 "http://dry-‐ocean-‐9525.herokuapp.com/showdown" Running 3m test @ http://dry-‐ocean-‐9525.herokuapp.com/showdown 12 threads and 800 connections Thread Stats Avg Stdev Max +/-‐ Stdev Latency 3.07s 2.06s 8.36s 70.39% Req/Sec 24.65 9.97 63.00 67.10% 54256 requests in 3.00m, 122.50MB read Socket errors: connect 0, read 1, write 0, timeout 0 Requests/sec: 301.36 Transfer/sec: 696.77KB Phoenix Rails w/ Puma ॾ৚݅͋ΔͷͰߟ࡯͸ࣗݾ੹೚Ͱɻ 1IPFOJY͕ൺֱͯ͠଎͍ͷ͸ؒҧ ͍ͳͦ͞͏

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΄͔ •  &MJYJSຊ൪Քಇ࣮੷ – υϦίϜ͞Μɺ%"6ສͷ"Eͷ"1* •  GBMPPENBSV &MJYJSͷ(SBQF •  IUUQXXXTMJEFTIBSFOFUPISTIJCVZBFYFMJYJS •  1IPFOJYͷ$IBOOFM – ઀ଓܰྔϓϩηεͰॲཧ͢Δϝοηʔδ ϋϯυϥ •  8FC4PDLFU

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ྑ͍͜ͱ͹͔Γݴ͍·͕ͨ͠ŋŋŋ •  ฒߦੑೳ͕ߴ͍ɺԠ౴ੑೳ͕ྑ͍ͱ͸ݴ͕ͬͨʮܭࢉ͕ ଎͍ʯͱ͸ݴͬͯͳ͍ –  1IPFOJYελοΫ͸3BJMTΑΓ͸଎͍ɺ͚Ͳ΋ –  ಈతܕ෇͚ݴޠͰ͢͠ –  ˞ҰԠ)J1&ʹ͢Δͱ଎͘͸ͳΔ΋Α͏ •  ؔ਺ܕݴޠͱͯ͠͸ͦ͜·ͰߴػೳͰ͸ͳ͍ •  ݸਓతͳ࿩ େن໛ӡ༻ͯ͠ͳ͍ͷͰ$POTΛޠΔʹ ஌ݟ଍Γͳ͍ •  &MJYJSྲྀߦΔ͔͸·ͩະ஌਺ –  ϓϩμΫγϣϯ౤ೖࣄྫ͸·ͩ͜Ε͔Β

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