Quick start with Search Redis

Quick Start Guide for RediSearch

Let's get started with RediSearch.

Redis cloud

All Redis Cloud managed services support RediSearch. Redis Cloud Essentials provides a 30MB managed database for free.

Running with Dockers

docker run -p 6379:6379 redislabs/redisearch:latest

Building and running from source

• First, clone the git repo and then make sure not to omit the --recursive option, to properly clone the submodule

git clone --recursive https://github.com/RediSearch/RediSearch.git
cd RediSearch

• Then install some dependencies:

For macOS:

make setup

For Linux:

sudo make setup

• After this step try to build:

make build

• Finally, run Redis with RediSearch:

make run

Creating an index with some fields and weights (default weight is 1.0)

127.0.0.1:6379> FT.CREATE myIdx ON HASH PREFIX 1 doc: SCHEMA title TEXT WEIGHT 5.0 body TEXT url TEXT
OK

Adding documents to the index 

127.0.0.1:6379> hset doc:1 title "hello world" body "lorem ipsum" url "http://redis.io" 
(integer) 3

Searching the index

127.0.0.1:6379> FT.SEARCH myIdx "hello world" LIMIT 0 10
1) (integer) 1
2) "doc:1"
3) 1) "title"
   2) "hello world"
   3) "body"
   4) "lorem ipsum"
   5) "url"
   6) "http://redis.io"

Note: Input is expected to be valid utf-8 or ASCII. The engine cannot handle wide-character Unicode at the moment

Dropping the index 

To drop a particular index in Redis search we can use this command:

127.0.0.1:6379> FT.DROPINDEX myIdx 
OK

Adding and getting Auto-complete suggestions

127.0.0.1:6379> FT.SUGADD autocomplete "hello world" 100
OK
127.0.0.1:6379> FT.SUGGET autocomplete "he"
1) "hello world"

Frequently Asked Questions

What is the Redis module?

Redis modules are the dynamic libraries that can be loaded into Redis using the MODULE LOAD command or during startup. Redis provides a C API in the form of a single Redis module C header file.

Is Redis open source?

Yes, Redis Search is open source.

Can Redis replace MySQL?

Redis isn't a replacement for a relational (e.g. MySQL) or document-based (e.g. MongoDB) database because it has limited ability to construct associations between data objects.

Is Redis search fast?

Despite the much higher size and the number of documents, looking for web pages or other content on the web is much faster than searching on our local computer.

How many keys can Redis store?

Redis can handle up to 2^32 keys and was tested in practice to handle at least 250 million keys per instance.

Conclusion

In this article, we studied RediSearch in detail. We saw its uses and key concepts. We hope that this blog has helped you enhance your knowledge of RediSearch.

After reading about the Redis Search, are you not feeling excited to read/explore more articles on the topic of Redis? Don't worry; Coding Ninjas has you covered. To learn, see Redis Configuration, Introduction to Data Types in Redis from Code studio. 

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