An overview of the RediSearch in-memory search engine.

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Redis has no built in
concept of indexing!

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⇒ …

5. Key
"I'm a Plain Text String!"
{ A: “foo”, B: “bar”, C: “baz” }
{ A , B , C , D , E }
[ A → B → C → D → E ]
{ A: 0.1, B: 0.3, C: 100, D: 1337 }
{ A: (51.5, 0.12), B: (32.1, 34.7) }
00110101 11001110 10101010
Looks like a
set will do!

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redis> SADD hello doc1
redis> SADD world doc1
redis> SINTER hello world

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14. Tokenizing /
Indexing
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Text: “lcd tv”
Price: 500
Doc1
Intersect Index Entries

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Key
[doc1, doc2, …]
{title:“Toshiba 32 LCD TV”, …}
{200..400: [prod1, prod2, …]… }
Toshib*
{ A: (51.5, 0.12), B: (32.1, 34.7) }

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20. INTERSECT
UNION Obama
Barack Barak
Date: 2010-2016
Scoring functionResult Processor

22. Hello world
means: hello AND world
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23. "Hello world"
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24. Hello|hola world|mundo
(hello world)|(hola mundo)
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25. @title:Hello world
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26. @title|body:Hello world @pic:jpg
modifiers are implicitly "AND"ed
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27. @title:lcd tv @price:[100 300]
@title:lcd tv @price:[(100 +inf]
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28. @title:tv ~@description:lcd
optional matches just increase score
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29. @title:tv -plasma
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30. Hello wo*
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31. @title:(lcd tv)
@price:[100 500]
-@type:4K|Plasma
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redisearch.io/Clients/

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36. FT.CREATE products
SCHEMA
title TEXT SORTABLE
body TEXT
cats TEXT NOSTEM
brand TEXT NOSTEM
price NUMERIC SORTABLE

37. FT.ADD products
prod1 0.58
FIELDS
title “Samsung 42 Inch LCD TV”
brand “Samsung”
body “Is Nice TV!”
cats “tvs, electronics”
price 350

38. FT.SEARCH products
“@title|body:(lcd 42|44|50)
@cats:(tvs|electronics )
@brand:(samsung|sony)
@price:[200 500]”
LIMIT 0 20
SORTBY price DESC

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44. FT.SEARCH idx “foo”

45. FT.SEARCH idx “foo”

47. FT.SEARCH idx “foo”

48. FT.SEARCH idx “foo”

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58. Dvir Volk
Senior Architect
Redis Labs
@dvirsky

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61. Query 1
Query 2
Query 3
Query 4
Query 1
Query 1
Query 2
Query 3
Query 2
Query 2
ElapsedTime
Serial Query
Execution
Concurrent Query
Execution
Query 4