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
俺の全文検索エンジン(Go製)を作り始めた
Search
kotaroooo0
November 11, 2020
Programming
0
110
俺の全文検索エンジン(Go製)を作り始めた
kotaroooo0
November 11, 2020
Tweet
Share
More Decks by kotaroooo0
See All by kotaroooo0
データ鮮度を落とさずに安全にReindexしたい
kotaroooo0
0
82
検索エンジン自作入門 Go Conference 2021 Spring
kotaroooo0
17
7.3k
転置インデックスでどう検索しているか
kotaroooo0
0
300
ぼくのかんがえたさいきょうのDocker Build
kotaroooo0
0
87
Other Decks in Programming
See All in Programming
バイブスあるコーディングで ~PHP~ 便利ツールをつくるプラクティス
uzulla
1
320
QA x AIエコシステム段階構築作戦
osu
0
240
SQLアンチパターン第2版 データベースプログラミングで陥りがちな失敗とその対策 / Intro to SQL Antipatterns 2nd
twada
PRO
36
11k
大規模FlutterプロジェクトのCI実行時間を約8割削減した話
teamlab
PRO
0
440
No Install CMS戦略 〜 5年先を見据えたフロントエンド開発を考える / no_install_cms
rdlabo
0
430
kiroでゲームを作ってみた
iriikeita
0
140
リッチエディターを安全に開発・運用するために
unachang113
1
350
LLMは麻雀を知らなすぎるから俺が教育してやる
po3rin
3
1.9k
CEDEC 2025 『ゲームにおけるリアルタイム通信への QUIC導入事例の紹介』
segadevtech
2
740
オホーツクでコミュニティを立ち上げた理由―地方出身プログラマの挑戦 / TechRAMEN 2025 Conference
lemonade_37
1
430
AWS Summit Japan 2024と2025の比較/はじめてのKiro、今あなたは岐路に立つ
satoshi256kbyte
1
260
階層化自動テストで開発に機動力を
ickx
1
470
Featured
See All Featured
Understanding Cognitive Biases in Performance Measurement
bluesmoon
29
1.8k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.5k
Large-scale JavaScript Application Architecture
addyosmani
512
110k
Git: the NoSQL Database
bkeepers
PRO
431
65k
Fashionably flexible responsive web design (full day workshop)
malarkey
407
66k
A designer walks into a library…
pauljervisheath
207
24k
Become a Pro
speakerdeck
PRO
29
5.5k
Optimizing for Happiness
mojombo
379
70k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
30
2.2k
Practical Orchestrator
shlominoach
190
11k
Mobile First: as difficult as doing things right
swwweet
223
9.9k
Build The Right Thing And Hit Your Dates
maggiecrowley
37
2.8k
Transcript
2020/11/11 @kotaroooo0 ԶͷશจݕࡧΤϯδϯ(Go) Λ࡞Γ࢝Ίͨ
͜ͷLTΛฉ͘ͱ… 1. ͳΜͱͳ͘શจݕࡧΤϯδϯͷΈ͕͔ Δ 2. GoͰશจݕࡧΤϯδϯΛ࡞Γ࢝ΊΒΕΔ
-શจݕࡧΤϯδϯͷΈΛΔ -ElasticsearchͰΘΕ͍ͯΔApache LuceneΆ͍༷ͷͷΛ࡞Δ -GoΛֶΜͰ͍ΔͷͰԿ͔࡞Γ͍ͨ -Twitter BotΛ࡞͍ͬͯΔ͕ɺͪΐ͏Ͳ͍͍શจݕࡧΤϯδϯ͕ͳ͍ -ܰྔɺ͔ͭॏΈ͖ϨʔϕϯγϡλΠϯڑΛܭࢉͰ͖Δͭ શจݕࡧΤϯδϯΛ࡞Δཧ༝
3Ͱ͔ΔશจݕࡧΤϯδϯ
શจݕࡧͷΈ INDEXING ୯ޠ จॻ have 1,2 pen 1 we 2
Desk 2 จॻ1 “I have a pen.” จॻ2 “We have desk.” CHAR FILTER TOKENIZER TOKEN FILTER Analyzer
શจݕࡧͷΈ SEARCH ୯ޠ จॻ have 1,2 pen 1 we 2
Desk 2 ݕࡧϫʔυ: “pen” จॻ1͕ώοτ CHAR FILTER TOKENIZER TOKEN FILTER Analyzer
ANALYZERͳͥඞཁ? - τʔΫϯׂͯ͘͠ΕΔͨΊ - “I have a pen.” ͜ͷ··ͰసஔΠϯσοΫε Λ࡞Ͱ͖ͳ͍ͷͰɺI,
have, a, penͱτʔΫ ϯׂ͍ͨ͠ - ΫΤϦͷදه༳ΕΛٵऩͨ͠Γ͢ΔͨΊ - “GOD”ͱ͍͏୯ޠΛؚΉυΩϡϝϯτ ɺ”god”Ͱώοτ͢ΔΑ͏ʹখจࣈʹ౷Ұ ͍ͤͨ͞ - ແବͳτʔΫϯͷϑΟϧλϦϯά - theͳͲΠϯσΩγϯάͯ͠ແବ Analyzeલ Analyzeޙ “I have a BIG pen!” have, big, pen
۩ମతͳANALYZERྫ - Char Filter(Tokenizerͷલʹॲཧ͢Δ) 0ݸҎ্ - Mapping: إจࣈΛ୯ޠʹมͳͲ - HTMLstrip:
HTMLΛύʔε - Tokenizer(τʔΫϯׂ͢Δ) 1ݸ - Standard: εϖʔεͳͲϧʔϧʹैׂͬͯ - Kuromoji: ܗଶૉղੳͰׂ - Ngram: Nจࣈ͝ͱʹׂ - Token Filter(Tokenizerͷޙʹॲཧ͢Δ) 0ݸҎ্ - Lowercase: খจࣈ - Stopword: ετοϓϫʔυআڈ - Stemming: දه༳Ε CHAR FILTER TOKENIZER TOKEN FILTER Analyzer
࣮
ANALYZERͷ࣮ߦΠϝʔδ Analyzeલ MappingCharFilter StandardTokenizer LowercaseFilter StopWordFilter StemmerFilter I have a
lot of TASKs. I am very sad :( I have a lot of TASKs. I am very sad _sad_ I, have, a, lot, of, TASKs, I, am, very, sad, sad I, have, a, lot, of, tasks, I, am, very, sad, sad lot, tasks, am, very, sad, sad lot, task, am, very, sad, sad ॲཧͷྲྀΕ
ANALYZERͷ࣮
CHAR FILTERͷ࣮
TOKENIZERͷ࣮
TOKEN FILTERͷ࣮
INDEX - సஔΠϯσοΫε map[string][]int - సஔΠϯσοΫεΛϑΟʔϧυ ໊͝ͱʹ࣋ͭ - υΩϡϝϯτɺIDͱϑΟʔϧ υΛ࣋ͭ
- Indexing͢Δͱ͖AnalyzerΛ ௨͢
SEARCH -ANDݕࡧͱORݕࡧ -ΫΤϦ: “pink orange blue” -ANDݕࡧ: 3 -OR: ݕࡧ1,2,3,4,5,6
pink Orange blue 6 3 4 5 2 1
ಈ͔ͯ͠ΈΔ
ݕࡧྫ - ※Analyzer͖ͬ͞ͱಉ༷ - IndexSearchAnalyzerΛ௨͢ - ”foxes”Ͱ”fox”ΛؚΉυΩϡϝϯτ͕Ϛον - ”happy”Ͱ”:)”ΛؚΉυΩϡϝϯτ͕Ϛον -
ANDݕࡧ - fine,FaX,foxes,happy͕શؚͯ·Ε͍ͯΔυΩϡϝ ϯτ1,2͕ώοτ͍ͯ͠Δ
ࠓޙ -͍͋·͍ݕࡧΛ࣮͢Δ -Fuzzy QueryɺSuggesters -είΞܭࢉΛ࣮͢Δ -IFIDF, BM25
ࢀߟ -https://github.com/kotaroooo0/stalefish -https://artem.krylysov.com/blog/2020/07/28/lets-build-a-full-text-search-engine/