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--- title: Using Redis modules with Azure Managed Redis description: You can use Redis modules with your Azure Managed Redis instances to extend your caching use cases. ms.date: 05/18/2025 ms.topic: conceptual ms.custom: - template-concept - ignite-2024 - build-2025 appliesto: - ✅ Azure Managed Redis --- # Use Redis modules with Azure Managed Redis With Azure Managed Redis, you can use Redis modules to add more data structures and functionality to the core Redis software. These extend the use-cases of Redis by adding functionality like search capabilities and data structures like bloom and cuckoo filters. You add the modules at the time you're creating your Azure Managed Redis instance. For more information on creating an AMR cache, see [Quickstart: Create an Azure Managed Redis Instance](quickstart-create-managed-redis.md). ## Scope of Redis modules Some popular modules are available for use in Azure Managed Redis: | Module | Memory Optimized |Balanced | Compute Optimized |Flash Optimized | |---------|---------|---------|---------|---------| |RediSearch | Yes | Yes | Yes| No | |RedisBloom | Yes | Yes | Yes | No | |RedisTimeSeries | Yes | Yes | Yes | No | |RedisJSON | Yes | Yes | Yes | Yes | > [!NOTE] > Currently, you can't manually load any modules into Azure Managed Redis. Manually updating modules version is also not possible. ## Using modules with active geo-replication Only the `RediSearch` and `RedisJSON` modules can be used concurrently with [active geo-replication](how-to-active-geo-replication.md). Using these modules, you can implement searches across groups of caches that are synchronized in an active-active configuration. Also, you can search JSON structures in your active-active configuration. ## Client library support The standard Redis client libraries have a varying amounts of support for each module. Some modules have specific libraries that add client support. Check the Redis [documentation pages](#modules) for each module to see more detail on which client libraries support them. ## Adding modules to your cache You must add modules when you create your Azure Managed Redis instance. To add a module or modules when creating a new instance, use the settings in the Advanced tab. You can add all the available modules or to select only specific modules to install. :::image type="content" source="media/how-to-use-modules/managed-redis-add-modules.png" alt-text="Screenshot of advanced tab showing a list of modules to add to a new cache. "::: > [!IMPORTANT] > Modules must be enabled at the time you create an Azure Managed Redis instance. For more information, see [Quickstart: Create an Azure Managed Redis Instance](quickstart-create-managed-redis.md). ## Modules The following modules are available when creating a new Azure Managed Redis instance. - [RediSearch](#redisearch) - [RedisBloom](#redisbloom) - [RedisTimeSeries](#redistimeseries) - [RedisJSON](#redisjson) ### RediSearch The **RediSearch** module adds a real-time search engine to your cache combining low latency performance with powerful search features. Features include: - Multi-field queries - Aggregation - Prefix, fuzzy, and phonetic-based searches - Auto-complete suggestions - Geo-filtering - Boolean queries Additionally, **RediSearch** can function as a secondary index, expanding your cache beyond a key-value structure and offering more sophisticated queries. **RediSearch** also includes functionality to perform [vector similarity queries](https://redis.io/solutions/vector-search/) such as K-nearest neighbor (KNN) search. This feature allows Azure Managed Redis to be used as a vector database, which is useful in AI use-cases like [semantic answer engines or any other application that requires the comparison of embeddings vectors](https://redis.com/blog/rediscover-redis-for-vector-similarity-search/) generated by machine learning models. You can use **RediSearch** is used in a wide variety of use-cases, including real-time inventory, enterprise search, and in indexing external databases. [For more information, see the RediSearch documentation page](https://redis.io/search/). >[!IMPORTANT] > The RediSearch module requires use of the `Enterprise` clustering policy and the `NoEviction` eviction policy. For more information, see [Clustering](architecture.md#clustering). > ### RedisBloom RedisBloom adds four probabilistic data structures to a Redis server: **bloom filter**, **cuckoo filter**, **count-min sketch**, and **top-k**. Each of these data structures offers a way to sacrifice perfect accuracy in return for higher speed and better memory efficiency. | **Data structure** | **Description** | **Example application**| | ---------------------|------------------------|-------------------------| | **Bloom and Cuckoo filters** | Tells you if an item is either (a) definitely not in a set or (b) potentially in a set. | Checking if an email has already been sent to a user| |**Count-min sketch** | Determines the frequency of events in a stream | Counting how many times an IoT device reported a temperature under 0 degrees Celsius. | |**Top-k** | Finds the `k` most frequently seen items | Determine the most frequent words used in War and Peace. (for example, setting k = 50 returns the 50 most common words in the book) | **Bloom and Cuckoo** filters are similar to each other, but each has a unique set of advantages and disadvantages that are beyond the scope of this documentation. For more information, see [RedisBloom](https://redis.io/probabilistic/). ### RedisTimeSeries The **RedisTimeSeries** module adds high-throughput time series capabilities to your cache. This data structure is optimized for high volumes of incoming data and contains features to work with time series data, including: - Aggregated queries (for example, average, maximum, standard deviation, etc.) - Time-based queries (for example, start-time and end-time) - Down sampling/decimation - Data labeling for secondary indexing - Configurable retention period This module is useful for many applications that involve monitoring streaming data, such as IoT telemetry, application monitoring, and anomaly detection. For more information, see [RedisTimeSeries](https://redis.io/timeseries/). ### RedisJSON The **RedisJSON** module adds the capability to store, query, and search JSON-formatted data. This functionality is useful for storing document-like data within your cache. Features include: - Full support for the JSON standard - Wide range of operations for all JSON data types, including objects, numbers, arrays, and strings - Dedicated syntax and fast access to select and update elements inside documents The **RedisJSON** module is also designed for use with the **RediSearch** module to provide integrated indexing and querying of data within a Redis server. Using both modules together can be a powerful tool to quickly retrieve specific data points within JSON objects. Some common use-cases for **RedisJSON** include applications such as searching product catalogs, managing user profiles, and caching JSON-structured data. For more information, see [RedisJSON](https://redis.io/json/). > [!NOTE] > The `FT.CONFIG` command is not supported for updating module configuration parameters. However, this can be achieved by passing in arguments configuring the modules when using management APIs. For instance, you can see samples of configuring the `ERROR_RATE` and `INITIAL_SIZE` properties of the RedisBloom module using the `args` parameter with the [REST API](/rest/api/redis/redisenterprisecache/databases/create), [Azure CLI](/cli/azure/redisenterprise), or [PowerShell](/powershell/module/az.redisenterprisecache/new-azredisenterprisecache). ## Related content - [Quickstart: Create an Azure Managed Redis Instance](quickstart-create-managed-redis.md) - [Client libraries](best-practices-client-libraries.md)