Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Golang @ISUCON
Search
y_matsuwitter
November 30, 2014
Programming
10
4.3k
Golang @ISUCON
GoCon 2014 Autmun
y_matsuwitter
November 30, 2014
Tweet
Share
More Decks by y_matsuwitter
See All by y_matsuwitter
Building Products in the LLM Era
ymatsuwitter
11
9.4k
Product Utilization of Large Language Models Starting Today
ymatsuwitter
3
2.8k
経営・意思・エンジニアリング
ymatsuwitter
23
20k
LLM in 2023 and 2024
ymatsuwitter
8
5.8k
Turbulent Technological Changes and Career Strategies
ymatsuwitter
2
2.8k
LLM in toB Service and Its UX
ymatsuwitter
7
11k
Agent and small LLM validation
ymatsuwitter
7
3k
Information management for a culture of speed: The story of Notion and LayerX
ymatsuwitter
4
10k
Monorepo on AWS
ymatsuwitter
0
320
Other Decks in Programming
See All in Programming
Porting a visionOS App to Android XR
akkeylab
0
180
LINEヤフー データグループ紹介
lycorp_recruit_jp
0
1.8k
設計やレビューに悩んでいるPHPerに贈る、クリーンなオブジェクト設計の指針たち
panda_program
6
1.8k
第9回 情シス転職ミートアップ 株式会社IVRy(アイブリー)の紹介
ivry_presentationmaterials
1
260
AWS CDKの推しポイント 〜CloudFormationと比較してみた〜
akihisaikeda
3
320
Team topologies and the microservice architecture: a synergistic relationship
cer
PRO
0
1.2k
Select API from Kotlin Coroutine
jmatsu
1
220
High-Level Programming Languages in AI Era -Human Thought and Mind-
hayat01sh1da
PRO
0
710
PipeCDのプラグイン化で目指すところ
warashi
1
250
LT 2025-06-30: プロダクトエンジニアの役割
yamamotok
0
670
来たるべき 8.0 に備えて React 19 新機能と React Router 固有機能の取捨選択とすり合わせを考える
oukayuka
2
890
Discover Metal 4
rei315
2
110
Featured
See All Featured
The Cult of Friendly URLs
andyhume
79
6.5k
Building Flexible Design Systems
yeseniaperezcruz
328
39k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
Fashionably flexible responsive web design (full day workshop)
malarkey
407
66k
A designer walks into a library…
pauljervisheath
207
24k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.3k
Documentation Writing (for coders)
carmenintech
72
4.9k
Thoughts on Productivity
jonyablonski
69
4.7k
Docker and Python
trallard
44
3.5k
Building Applications with DynamoDB
mza
95
6.5k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
20
1.3k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
26k
Transcript
Golang @ISUCON y_matsuwitter
!Z@NBUTVXJUUFS Gunosy inc., ࣥߦһ ! Goྺ1ऑ͘Β͍ ! όϥϯεϘʔϧਖ਼࠲ͷਓ
ීஈͷۀ GoʹΑΔAPIαʔόߏங (2014.3~) iOS/AndroidͷΞϓϦ։ൃ Django/RailsʹΑΔWebApp։ൃ
ʊਓਓਓਓਓਓਓਓਓਓਓਓਓʊ ʼɹGolangΤϯδχΞืूதɹʻ ʉY^Y^Y^Y^Y^Y^Y^Y^Y^Yʉ
ࠓͷ ॳΊͯͷISUCONΛGolangͰઓͬͯΈͨ ※GolangҎ֎ͷ͠·ͤΜ Ґͱத్ͳ݁ՌͰ͕ͨ͠ʜ
ISUCONͱ Iikanjini Speed Up CONtest ! 8࣌ؒͰ༩͑ΒΕͨWebAppΛग़དྷΔݶΓߴ Խ͢Δίϯςετ
༧બ αʔό: 1 େMySQLΛDB ࠓۜߦͷϩάΠϯϖʔδ͕ࡐͰͨ͠
ܾউ αʔό: 3~4 ը૾ॲཧಈըͷ৴ͳͲ͋Δఔෛՙͷߴ ͍ॲཧΛؚΉWebApp ࠓಈըࠂͷ৴αʔόͰͨ͠
ߴͳWebαʔόͷͨΊʹ ϦιʔεΛ͍Δ CPU … Encode/decode, ը૾ॲཧͳͲ Memory … ϓϩηε্ͷσʔλྔ Data
Transfer … αʔόؒɺαʔόΫϥΠΞϯτؒͷ૯௨৴ྔ ! ͦͷ্ͰదͳॲཧʹϦιʔεΛׂΓͯΔ
ݴޠੑೳ ܾఆతͳࠩʹͳΒͳ͍
Why Go? վળͷޮͷߴ͞ - ߏจ͕SimpleͳͨΊ࣌ؒͷνʔϜ։ൃ͖ - ฒྻɾฒߦॲཧͰͷϝϞϦपΓͷѻָ͍͕ - σϓϩΠָ͕ -
ඪ४ύοέʔδ͕ඇৗʹ࣮༻త
औΓΜͩ͜ͱ 1. ϓϩηεΩϟογϡ 2. λεΫࢄॲཧ
ϓϩηεΩϟογϡ σʔλΛϓϩηε্ʹશͯอ͓࣋ͯ͘͠ ! ӬଓԽదͳλΠϛϯάͰRedisʹอଘͳ ΓϑΝΠϧʹdumpͳΓ͢Δ
߹ੑ વɺෳͷGoroutine͔ΒಡΈॻ͖͞ΕΔ ͨΊͷ߹ੑΛอূ͢Δඞཁ͕͋Δ
Race Condition ڝ߹͢Δมૢ࡞Λߦ͏ͱෆ҆ఆͳڍಈ Goroutine·͍ͨͰڞ༗ͷΛಡΈॻ͖͢Δ ࡍrace conditionΛආ͚ΔͨΊLock͕ඞཁ
sync ֤छͷϩοΫΛѻ͏ύοέʔδ ! sync.RWMutex - ReadΛWriteͰϩοΫϨϕϧΛͨ͠Lock sync/atomic - ΧϯλͳͲͷॲཧΛ࡞Δͷʹॏๅ
atomic.Value from golang1.4 ! ϓϩηε্ʹatomicʹσʔλߋ৽Ͱ͖Δετ Ξͱͯ͠ઃܭ͞Ε͍ͯ·͢
None
ಡΈࠐΈଆ7BMVF͔Β-PBE
ॻ͖ࠐΈଆ-PDLऔͬͨ͋ͱ 7BMVFʹ4UPSF
λεΫͷࢄॲཧ ཁ݅ - ॲཧʹ͔͔࣌ؒΔͷΛඇಉظɺ͔ͭฒߦ࣮ߦ Λ੍ݶ࣮ͯ͠ߦ͍ͨ͠ ! - ը૾ɾಈըͳͲॏෳͯ͠ॲཧͨ͘͠ͳ͍
Task Queueing capacity͖ͷchannelΛ͏ goroutine͕ͦͷ··workerతʹ͑Δ
None
ॏෳॲཧΛආ͚Δ ྫ͑ը૾ॲཧதʹɺͦͷը૾Λऔಘ͠ʹདྷ ΔϦΫΤετΛfailͤͯ͞ͳΒͳ͍ ! ͔͠͠ɺऔಘ࣌ʹॏෳॲཧ͕࣌ؒମແ͍
αʔό͕1ͷ߹
sync.Cond ॲཧதͷͷΛબతʹͭ
None
αʔό͕ෳͷ࣌
y-matsuwitter/mcond ෳͷαʔόؒͰsync.CondΛѻ͑ΔΑ͏ ʹͨ͠ͷ ! Redis + net/httpΛར༻
ೋͷαʔόͰͷmcond
ॲཧଆ ಡΈࠐΈଆ
ॲཧઌΛৼΓ͚Δ
stathat/consistent ίϯγεςϯτϋογϡϥΠϒϥϦ ! Ұఆͷ໊લʹରͯ͠ඞͣಉ͡ॲཧઌΛܾఆ ࠓճଳҬΛ͍௵ͨ͢Ίෳͷwebdav αʔόʹৼΓ͚Δ༻్Ͱར༻
None
ͪͳΈʹ ഊҼCache-Control HeaderͰͨ͠ IUUQTTV[VSJKQZ@NBUTVXJUUFSUTIJSUNCMBDL
࠷ޙʹ
ProductionͰ͓͏
None
ࢀߟ ඪ४ύοέʔδ http://golang.org/pkg/ go1.4 http://tip.golang.org/doc/go1.4 mcond https://github.com/y-matsuwitter/mcond consistent https://github.com/stathat/consistent