Azure Redis Cache Reservations

This insight identifies when there is pay-as-you-go spend for Azure Cache for Redis that could be covered by a reservation for compute resources. Learn more about these reservations [here]https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-reserved-pricing.

How reservations work:

The size of the reservation should be based on the total amount of memory used by the existing or soon-to-be-deployed cache within a specific region, and using the same service tier.
Premium and Enterprise Caches have 2 nodes by default, while Enterprise Flash has 3 nodes.
Reservations are sold in increments of nodes. Use the Azure Pricing Calculator to calculate the number of nodes needed based on the number of hours to cover with a reservation.

When purchasing a reservation in Azure, you must specify the following:

Subscription - Subscription used to pay for the Azure Cache for Redis reservation.
Scope - The reservation's scope can cover one subscription, multiple subscriptions (shared scope), a single resource group, or a management group.
Region - The Azure region that's covered by the capacity reservation.
Pricing Tier - The service tier for the instances.
Term - 1 or 3 years.
Quantity - The number of nodes to reserve in the selected Azure region and Pricing Tier.

Learn more about buying a reservation here.

When to buy a reservation:

Analyze your usage information to help determine which reservations you should purchase.
Learn more about how to determine the correct reservation size here.

Items to Note:

Applicable Tiers: Reservations are only available for Premium, Enterprise, and Enterprise Flash Redis Cache tiers.
Reservation Flexibility: You can cancel, exchange, or refund reservations with certain limitations. Learn more here.
Role Requirements: To buy a reservation, you must have the Owner role or Reservation Purchaser role on an Azure subscription.
Savings Calculation: The savings multiplier used to calculate the cost impact for this insight represents the savings achieved in applying a reservation to a non-Enterprise Account resource cost.

The 90 day cost graph shows the daily total spend for all instances with a Premium, Enterprise, or Enterprise Flash Redis Cache tier and highlights the top 5 resources with the highest spend to consider optimizing.

Source

The information for this insight is based on spend data in the CloudZero platform.

Frequency

This insight is checked once per day. If the insight is marked as Ignored it will still get updated, but notifications will no longer be sent for any updates.

Threshold

This insight is created if using a reservation on pay-as-you-go Redis Cache will save at least $500 based on a 25% savings rate. When pay-as-you-go spend results in savings less than $500, the insight will automatically be closed.