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
About: consistent hashing
Search
Harukasan
PRO
February 27, 2017
Technology
0
210
About: consistent hashing
Harukasan
PRO
February 27, 2017
Tweet
Share
More Decks by Harukasan
See All by Harukasan
pixivを支える技術 / 技育CAMPアカデミア
harukasan
PRO
3
440
20240401 新卒研修 - ピクシブにおける技術領域
harukasan
PRO
1
760
ピクシブのコンテンツ配信基盤技術 / pixiv TECH SALON
harukasan
PRO
5
5.5k
Goにおける画像ファイル処理 / golang.tokyo #19
harukasan
PRO
7
6.6k
WebRTC動画をトランスコードする / Transcoding video streams from WebRTC
harukasan
PRO
5
1.5k
ImageFluxを支えるリモート開発 / 20171202
harukasan
PRO
2
1.8k
YAPC::Fukuoka 前夜祭LT / Yet Another Pawoo Commit logs
harukasan
PRO
0
3k
YAPC::Fukuoka lunch session
harukasan
PRO
1
3k
マストドン会議: Pawoo / Mastodon Kaigi2
harukasan
PRO
2
470
Other Decks in Technology
See All in Technology
AI_Agent_の作り方_近藤憲児
kenjikondobai
14
2.9k
データモデルYANGの処理系を再発明した話
tjmtrhs
0
530
マーケットプレイス版Oracle WebCenter Content For OCI
oracle4engineer
PRO
3
560
結果的にこうなった。から見える メカニズムのようなもの。
recruitengineers
PRO
1
140
# Azure Cosmos DB パフォーマンス最適化入門 - 設計・開発・運用の実践テクニック
shibayan
0
130
書籍『入門 OpenTelemetry』 / Intro of OpenTelemetry book
ymotongpoo
10
650
Microsoft_20250311_第2回AI_IoT共創ラボ.pdf
iotcomjpadmin
0
130
Codar: Arte ou Ciência?! A Jornada de um DEV na Creator Economy
vclementino
0
180
いまからでも遅くない!コンテナでWebアプリを動かしてみよう!コンテナハンズオン編
nomu
0
200
StotybookからはじめるVRT -個人開発編-
arrow2nd
1
670
なぜ「Event Sourcing」を選択したのか〜事実に基づくことの重要性〜/Why did we choose "Event Sourcing"?
bitkey
0
100
User Story Mapping + Inclusive Team
kawaguti
PRO
3
650
Featured
See All Featured
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
134
33k
Rebuilding a faster, lazier Slack
samanthasiow
80
8.9k
Why Our Code Smells
bkeepers
PRO
336
57k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
129
19k
Become a Pro
speakerdeck
PRO
26
5.2k
[RailsConf 2023] Rails as a piece of cake
palkan
53
5.3k
Fireside Chat
paigeccino
36
3.2k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
280
13k
The Pragmatic Product Professional
lauravandoore
32
6.4k
Facilitating Awesome Meetings
lara
53
6.3k
Bash Introduction
62gerente
611
210k
Transcript
ӋԍӏӑӞԍӠӧӜӏӾʂҍ҅ѥ҈ ӬӆӏӮװɒױґҭѭѷҵ
ѵѵ҉ѥѧӧӜӏԍӇҊґ
ΌҐӄـҴΌҐӦـӡҍðҬƾ҈ҁѥ Ҋѥѧī
ֿ ׀ ׁ ׅ ׆ ׇ ֿ־ ֿ ׀ ׁ
ׂ ׃ ׄ ӄـ Ӧـӡ
ֿ ׀ ׁ ׅ ׆ ׇ ֿ־ ֿ ׀ ׁ
ׂ ׃ ׄ ˅ˤҍґѵѧҌ҆҈ҝѹѥ Ӧـӡ
ѵҮѮ҉ѯҭҊ ؆!ҐӏӼـӟҺԍӇ ؆ӄӼӜӏӾҐåࢄشࠓ´҆҈ҭҥ҅ ؆Ҍҍѭѣҭҥ҅ҴҌҵѭͮѥײѺҍåð ……ҊѭҠѣѥүѥүҊ¸ê
˕ӏԍӯԃҌȠʂ פӺӐӾԅʂץ
ֿ ׀ ׁ ֿ ׀ ׁ %3 = 1 %3
= 2 %3 = 0 ׂ %3 = 1 ӺӐӾԅʂ ӦـӡҐ²ҴҊҭ ׃ ׄ %3 = 2 %3 = 0
ӺӐӾԅʂ ؆ÅҬѮχѵҫҌѱ҈ͮѷѿѧ ؆ӏԍӯԃ ؆ӦـӡҴϟՃѻҭҊѯҍŖő
ӺӐӾԅʂ ֿ ׀ ׁ ֿ ׀ ׁ %3 = 1
%3 = 2 %3 = 0 ׂ %3 = 1 ׃ ׄ %3 = 2 %3 = 0
ӺӐӾԅʂ ׂ ֿ ׀ ׁ ֿ ׀ ׁ %3 =
1 %3 = 2 %3 = 0 ׂ %3 = 1 ׃ ׄ %3 = 2 %3 = 0
ֿ ׀ ׁ ֿ ׀ ׁ %4 = 1 %4
= 2 %4 = 3 ׂ %4 = 0 ӺӐӾԅʂ ׂ ׃ ׄ %4 = 1 %4 = 2 ӦـӡҴϟՃѻҭҊѯҍŖő ׀¦߱ѻқ҈҉ȳѯȈѩѮˠੜ
פӺӐӾԅʂץґ ࣮ΆѮ؆୯҂ѮӦـӡҐϟՃ؏আѮŖő
ӋԍӏӑӞԍӠӧӜӏӾʂ • @_LE@YJFYF[@Q،TSZLZ[FS[ @ZKLSJ@SE@SETR YFFZLZ[YLC\[FE@DKLSJYT[TDTQZITYFQLF_LSJ T[ WT[ZTS[KF"TYQE"LEF"FC،ׇׇֿׅׯ • ࣮ΆҊѹ҈ґFRD@DKFEҐҁңҐF[@R@ѮȵĚ K[[WZזזJL[K\CאDTRזזPF[@R@
• SJLSaW@DKFY@IILDFY_FYҤ࠾ˉ
ӋԍӏӑӞԍӠӧӜӏӾʂ ؆ӧӜӏӾВґɠҍåƖѻҭґѼ ؆ӧӜӏӾВҴԂԍӇ ҍѹ҈࣮Ά
ֿ ׀ ׁ ӋԍӏӑӞԍӠӧӜӏӾʂ ӦـӡӄـҐѿҮҀҮҴęѺӧӜӏӾ̌БҍࣹӨ @ZK @ZK @ZK ׯ ׯ
ׯ ӧӜӏӾ̌Б
ֿ ׀ ׁ @ZK @ZK @ZK ׯ ׯ ׯ ӧӜӏӾ̌Б
ֿ ׀ ׁ ׂ ׃ ׄ @ZK @ZK @ZK @ZK @ZK @ZK ׯ ׯ ׯ ׯ ׯ ׯ ӋԍӏӑӞԍӠӧӜӏӾʂ ӦـӡӄـҐѿҮҀҮҴęѺӧӜӏӾ̌БҍࣹӨ
ֿ @ZK ׯ ֿ ׀ ׁ @ZK @ZK @ZK ׯ
ׯ ׯ ۙѥÃҴબ ֿ ׀ ׁ ׂ ׃ ׄ @ZK @ZK @ZK @ZK @ZK @ZK ׯ ׯ ׯ ׯ ׯ ׯ ֿ˕ ҐÃҴҊҭ ؼ ӧӜӏӾ̌Б ӋԍӏӑӞԍӠӧӜӏӾʂ ӦـӡӄـҐѿҮҀҮҴęѺӧӜӏӾ̌БҍࣹӨ
ӋԍӏӑӞԍӠӧӜӏӾʂ ؆ӧӜӏӾВґɠҍåƖѻҭґѼ ؕҌҐ҉ÅҫҌѥ ؆ȳѯȈҰҭҐґӧӜӏӾ̌БҐ϶҂ѳҐґѼ ؕҌҐ҉ϟՃѹҁҊѯҐӘӹـӐѮƀҌѥ
ֿ ׀ ׁ ϟՃѹҁҊѯҐӘӹـӐѮƀҌѥ @ZK @ZK @ZK ׯ ׯ ׯ
ӧӜӏӾ̌Б ֿ ׀ ׁ ׂ ׃ ׄ @ZK @ZK @ZK @ZK @ZK @ZK ׯ ׯ ׯ ׯ ׯ ׯ
ϟՃѹҁҊѯҐӘӹـӐѮƀҌѥ ӧӜӏӾ̌Б ֿ ׀ ׁ ׂ ׃ ׄ @ZK @ZK
@ZK @ZK @ZK @ZK ׯ ׯ ׯ ׯ ׯ ׯ ֿ ׀ ׁ @ZK @ZK @ZK ׯ ׯ ׯ ׂ @ZK ׯ ׂҴϟՃ
ϟՃѹҁҊѯҐӘӹـӐѮƀҌѥ ӧӜӏӾ̌Б ֿ ׀ ׁ ׂ ׃ ׄ @ZK @ZK
@ZK @ZK @ZK @ZK ׯ ׯ ׯ ׯ ׯ ׯ ֿ ׀ ׁ @ZK @ZK @ZK ׯ ׯ ׯ ۙѥÃҴબ ׂ @ZK ׯ ȳѯȈҰ҆ҁҐґׄ҂ѳ
ӋԍӏӑӞԍӠӧӜӏӾʂ ؆ÅҫҌѥ ؆ϟՃѹҁҊѯҐӘӹـӐѮƀҌѥ
ӧӜӏӾ̌Б ֿ @ZK ׯ ˅ˤҍґ ؟ֿذ׀
˅ˤҍґ ӧӜӏӾ̌Б ֿ ׀ @ZK @ZK ׯ ׯ ׀ҴϟՃѻҭҊ ؟ֿذ׀׃־أ
ӧӜӏӾ̌Б ֿ ׀ @ZK @ZK ׯ ׯ ׁ @ZK ׯ
˅ˤҍґ ؟׀ذׁ׀׃أ ׁҴϟՃѻҭҊ
ӧӜӏӾ̌Б ֿ ׀ @ZK @ZK ׯ ׯ ׁ @ZK ׯ
ׂ @ZK ׯ ˅ˤҍґ ؟ׁذׂ׀׃أ ׂҴϟՃѻҭҊ
ӋԍӏӑӞԍӠӧӜӏӾʂ ؆ÅҫҌѥ ؆ϟՃѹҁҊѯҐӘӹـӐѮƀҌѥ
ӋԍӏӑӞԍӠӧӜӏӾʂҐ࣮Ά F[@R@ҐńĘׯ
# ϋογϡؔ32bit unsigned intͷϋογϡΛฦ͢ # CRC32, MD5ͷ্Ґ32bitͳͲͰ࣮ func hash(key string)
uint32 { ... } # ϊʔυͷϋογϡΛܭࢉ for _, node := range nodes { # ͻͱͭͷϊʔυຖʹ160ݸͷϋογϡΛܭࢉ for i := 0; i < 160; i++ { k := fmt.Sprintf(“%s-%d”, node, i) # ϊʔυ໊ͱϋογϡͷϖΞΛՃ continuum.add(node, hash(k)) } } # ϋογϡͰιʔτ͓ͯ͘͠ sort.Sort(continuum) ֿאӦـӡӶӜӯҐܭࢉ
ֿאӦـӡӶӜӯҐܭࢉ ӧӜӏӾ̌Б ֿ @ZK ׯ ֿ҅ҐӦـӡҍରѹ ΌҐӧӜӏӾҴܭࢉ ذӧӜӏӾܭࢉҍҩҭÅҬҴЕɦ ؕ׀־־¿ѱҫѥ҉ůŲׯ
# ϋογϡͰιʔτ͓͚ͯ͠ೋ୳ࡧͰ୳ࡧͰ͖Δ func search(key string) string { v := hash(key)
i, j := 0, n for i < j { h := i + (j-i)/2 if (continuum.values[i] > v) { i = h + 1 } else { j = h } } return continuum.nodes[i] } ׀אӧӜӏӾҐ୳ࡧ
׀אӧӜӏӾҐ୳ࡧ ӧӜӏӾ̌Б _ @ZK ׯ ֿ ׀ ׁ @ZK @ZK
@ZK ׯ ׯ ׯ ׂ @ZK ׯ å୳ࡧ҉˕ۙѥӧӜӏӾҴʹŲ
ҠҊң ӋԍӏӑӞԍӠӧӜӏӾʂׯ ؆ÅҫҌѥ ؕӧӜӏӾВҊѹ҈ґ׃ ¯ׁ׀CL[ׁ׀ !؆ֿ̙ ؆ϟՃѹҁҊѯҐӘӹـӐѮƀҌѥ ؆࣮ΆҤӏԍӯԃ