Set Redis version for Azure Cache for Redis

In this article, you'll learn how to configure the Redis software version to be used with your cache instance. Azure Cache for Redis offers the latest major version of Redis and at least one previous version. It will update these versions regularly as newer Redis software is released. You can choose between the two available versions. Keep in mind that your cache will be upgraded to the next version automatically if the version it's using currently is no longer supported.

Note

At this time, Redis 6 does not support ACL, and geo-replication between a Redis 4 and 6 cache.

Prerequisites

Create a cache using the Azure portal

To create a cache, follow these steps:

  1. Sign in to the Azure portal and select Create a resource.

  2. On the New page, select Databases and then select Azure Cache for Redis.

    Select Azure Cache for Redis.

  3. On the Basics page, configure the settings for your new cache.

    Setting Suggested value Description
    Subscription Select your subscription. The subscription under which to create this new Azure Cache for Redis instance.
    Resource group Select a resource group, or select Create new and enter a new resource group name. Name for the resource group in which to create your cache and other resources. By putting all your app resources in one resource group, you can easily manage or delete them together.
    DNS name Enter a globally unique name. The cache name must be a string between 1 and 63 characters that contains only numbers, letters, or hyphens. The name must start and end with a number or letter, and can't contain consecutive hyphens. Your cache instance's host name will be <DNS name>.redis.cache.windows.net.
    Location Select a location. Select a region near other services that will use your cache.
    Cache type Select a cache tier and size. The pricing tier determines the size, performance, and features that are available for the cache. For more information, see Azure Cache for Redis Overview.
  4. On the Advanced page, choose a Redis version to use.

    Redis version.

  5. Select Create.

    It takes a while for the cache to create. You can monitor progress on the Azure Cache for Redis Overview page. When Status shows as Running, the cache is ready to use.

Create a cache using Azure PowerShell

    New-AzRedisCache -ResourceGroupName "ResourceGroupName" -Name "CacheName" -Location "West US 2" -Size 250MB -Sku "Standard" -RedisVersion "6"

For more information on how to manage Azure Cache for Redis with Azure PowerShell, see here

Create a cache using Azure CLI

az redis create --resource-group resourceGroupName --name cacheName --location westus2 --sku Standard --vm-size c0 --redisVersion="6"

For more information on how to manage Azure Cache for Redis with Azure CLI, see here

Upgrade an existing Redis 4 cache to Redis 6

Azure Cache for Redis supports upgrading your Redis cache server major version from Redis 4 to Redis 6. Please note that upgrading is permanent and it may cause a brief connection blip. As a precautionary step, we recommend exporting the data from your existing Redis 4 cache and testing your client application with a Redis 6 cache in a lower environment before upgrading. Please see here for details on how to export.

Note

Please note, upgrading is not supported on a cache with a geo-replication link, so you will have to manually unlink your cache instances before upgrading.

To upgrade your cache, follow these steps:

  1. In the Azure portal, search for Azure Cache for Redis. Then, press enter or select it from the search suggestions.

    Search for Azure Cache for Redis.

  2. Select the cache instance you want to upgrade from Redis 4 to Redis 6.

  3. On the left side of the screen, select Advanced setting.

  4. If your cache instance is eligible to be upgraded, you should see the following blue banner. If you wish to proceed, select the text in the banner.

    Blue banner that says you can upgrade your Redis 6 cache with additional features and commands that enhance developer productivity and ease of use. Upgrading your cache instance cannot be reversed.

  5. A dialog box will then popup notifying you that upgrading is permanent and may cause a brief connection blip. Select yes if you would like to upgrade your cache instance.

    Dialog with more information about upgrading your cache.

  6. To check on the status of the upgrade, navigate to Overview.

    Overview shows status of cache being upgraded.

FAQ

What features aren't supported with Redis 6?

At this time, Redis 6 does not support ACL, and geo-replication between a Redis 4 and 6 cache.

Can I change the version of my cache after it's created?

You can upgrade your existing Redis 4 caches to Redis 6, please see here for details. Please note upgrading your cache instance is permanent and you cannot downgrade your Redis 6 caches to Redis 4 caches.

Next Steps