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Introduction
Redis is an in-memory data structure store that is open source (BSD licensed) and used as a database, cache, and message broker. In this article, we will go through Commands of Search in Redis.
Overview of Commands
RediSearch API Details about a specific module or command, such as FT, can be filtered. The specifics also include the commands' syntax, where:
Names of commands and their subcommands are capitalized, such as FT.CREATE.
Square brackets are used to denote optional arguments, such as [NOCONTENT].
Three-period characters, for instance, indicate the presence of additional optional arguments.
The query, in this case, hello|world is the first argument for the query commands FT.
SEARCH and FT.AGGREGATE. The second and third arguments are any additional parameters or characteristics.
Redis Search Commands
Command
Function
FT._LIST
Returns a list of all currently used indexes.
FT.ALIASADD alias index
An index should have an alias. This enables an administrator to transparently switch the indexes that application queries are sent to. Indexes may include several aliases, but no alias may refer to another alias.
FT.ALIASDEL alias
Removes alias out of the index.
FT.ALIASUPDATE alias index
Add an index and an alias. When an alias is already connected to another index, FT.ALIASUPDATE will end the connection to the earlier index.
FT.ALTER index SCHEMA ADD field options
A new attribute is added to the index. Any subsequent revisions to the document will use the newly added attribute when Indexing and reindexing existing documents if an attribute is added to the index.
FT.CONFIG GET option
Retrieves configuration options.
FT.CONFIG HELP option
Describes configuration options.
FT.CONFIG SET option value
Sets runtime configuration options.
FT.CREATE index
Creates an index according to the specified specifications.
FT.CURSOR READ index cursor_id
Reads future outcomes from a running cursor
FT.DICTDEL dict term
Takes words out of a dictionary.
FT.DROPINDEX index
Gets rid of the index. The document hashes connected to the index are not removed by default when using FT.DROPINDEX. The hashes are also deleted when the DD option is added.
FT.SEARCH index query
Uses a textual query to search the index and returns either documents or only ids.
FT.SPELLCHECK index query
Returns suggestions for misspelled terms after performing spelling correction on a query.
FT.SYNUPDATE index synonym_group_id
FT.TAGVALS index field_name
The command is used to add new terms to an existing synonym group or to create a new one. A scan of all papers is started, and the Tag field's unique collection of values is returned. If your tag indexes things like cities, genres, etc., this is helpful with the command.
Frequently Asked Questions
How does RediSearch function?
Redis has a primary-replica architecture with asynchronous replication, which allows for the image of data across numerous replica servers. As a result, read speed increases (as requests can be distributed among the servers), and the primary server recovers more quickly during an outage.
How many clients make Redis available?
10,000 relationships. Redis has a maximum Redis client connection limit of 10,000 by default. However, it can handle numerous connections. By changing the max client value within Redis, you can specify the maximum number of Redis client connections you wish the Redis server to accept.
How is data stored in memory by Redis?
Redis is an In-Memory Database (IMDB) since it stores data in the computer's main memory instead of traditional databases, which use disc storage. Because disc access is slower than memory access, Redis performs better than databases optimized for the disc.
How much demand can Redis support?
Number of Redis clients at maximum The maximum number of Redis clients that Redis 2.4 could support concurrently had a hard-coded restriction. This limit is dynamic in Redis 2.6 and defaults to 10000 Redis clients unless the max memory directive in Redis specifies otherwise.
Why is Redis so well-liked?
Built for Languages & Speed. Redis uses an in-memory dataset to operate at its current speed. You can periodically save the data to a disc or add all commands to a log to keep the data. If you're utilizing persistence as a temporary cache, you may turn it off as you don't always want it.
Conclusion
This article covers everything you need to know about Commands of Search in Redis.Still have more questions; Here are some articles for rescue:
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