Migrate an Azure Cache for Redis instance to availability zone support
This guide describes how to migrate your Azure Cache for Redis instance from non-availability zone support to availability zone support.
Azure Cache for Redis supports zone redundancy in its Standard, Premium tiers. A zone-redundant cache runs on VMs spread across multiple availability zone to provide high resilience and availability.
Note
Converting an existing resource from non-availability zone support to availability zone support is in preview for standard & premium tier caches.
Note
Zone redundancy isn't supported with geo-replication.
Enabling Zone Redundancy for Standard and Premium tiers
Updating an existing Standard or Premium cache to use zone redundancy is supported in-place (Preview). Users can enable it by navigating to the Advanced settings on the Resource menu and selecting Allocate Zones automatically check-box followed by the save button.
Users can't disable zone redundancy once it's enabled.
This update can also be done by passing ZonalAllocationPolicy as Automatic in the request body while updating the cache using REST API. For more information regarding the update process using REST API, see Update - ZonalAllocationPolicy.
Updating ZonalAllocationPolicy to any other value than Automatic` isn't supported.
Important
Automatic Zonal Allocation cannot be modified once enabled for a cache.
Important
Enabling Automatic Zonal Allocation for an existing cache (which is created with a different zonal allocation) is currently NOT supported for Geo Replicated caches or caches with VNet injection.
Next Steps
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