Edge Security Acceleration:Cache reserve

How it works

Cache reserve is designed for content with low cache hit ratios ("cold" traffic). For high hit ratio ("hot") traffic, configure cache rules to bypass cache reserve and optimize storage costs. For more information, see Configure cache reserve by using rules.

Before you begin

Before using cache reserve, purchase an instance. Contact your account manager or submit a ticket to request an instance with your required storage capacity in the region closest to your origin server.

Instance lifecycle

1. Purchase an instance

   Cache reserve is a monthly subscription service. Contact Alibaba Cloud sales or contact us to apply, then order an instance based on region and storage capacity. After ordering, the ESA system creates a cache reserve instance for you.

2. Change the storage capacity of an instance

   To change the storage capacity, contact your account manager or submit a ticket.

3. Release an instance

   When a subscription instance expires without renewal, it is automatically released and all cached resources are invalidated.

Configure cache reserve

1. In the ESA console, navigate to Websites. In the Website column, click the desired website.

2. In the left-side navigation pane, choose Caching > Cache Reserve.

3. In the Cache Reserve section, click Configure.

4. Turn on the Status switch.

5. From the Instance list, select a cache reserve instance.

   Select the instance in the region closest to your origin server. For example, if your origin server is in China (Hong Kong), select a China (Hong Kong) instance. If your required region is unavailable, contact your account manager or submit a ticket.

   Note

   • If you no longer need cache reserve, disable it promptly. Origin fetch requests will no longer route through the cache reserve POP. Changes take 3-5 minutes to take effect.

   • Each cache reserve instance supports up to 20 websites. Disabling cache reserve removes the website-instance association.

6. Click OK. The feature is enabled within 3-5 minutes.

Global features and rules

Global settings apply to all requests for a website. To enable a feature for specific requests only, use a rule with conditions for granular control. The rule-based equivalent is also named cache reserve.

Plan availability