> For the complete documentation index, see [llms.txt](https://clients.medianova.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://clients.medianova.com/products/performance-cdn/static-content-delivery/advanced-configuration/caching/shared-cache.md).
# Shared Cache
Define whether a CDN resource uses its own cache or shares a common cache structure across multiple accounts using the Domain Cache Key.
**Shared Cache** allows multiple CDN Resources or accounts to reuse identical cached content through a shared cache configuration. This can reduce duplicate cached objects and redundant requests to the origin.
You can manage Shared Cache in the [Medianova Control Panel](https://cloud.medianova.com) or via the [API](https://clients.medianova.com/api-documentation/performance-cdn/caching#put-api-v1-cdn-organization_uuid-resource-resource_uuid-5).
{% hint style="warning" %}
Resources that share a cache must use compatible cache key structures and serve identical content. Incorrect configuration can result in cache mismatches or unintended responses.
{% endhint %}
## Configure Shared Cache
{% stepper %}
{% step %}
### Open Shared Cache
Open your CDN Resource and select **Caching**.
Locate **Shared Cache**.
{% endstep %}
{% step %}
### Select the Status
Under **Status**, select one of the following options:
* **Default** — Uses an isolated cache for the resource or account.
* **Share** — Allows cached objects to be reused across participating resources.
{% endstep %}
{% step %}
### Select the Shared Cache Domain
When **Share** is selected, the **Shared Cache Domain** field becomes available.
Select the domain whose cache structure the CDN Resource should share.
{% endstep %}
{% step %}
### Save the Configuration
Select **Save** in the pending changes bar.
Review the pending changes and confirm the update to apply the configuration to the CDN Resource.
{% endstep %}
{% endstepper %}
## Shared Cache Behavior
When **Share** is configured, participating CDN Resources can reuse cached objects instead of maintaining separate copies of identical content.
When **Default** is selected, the resource uses its standard isolated cache behavior.
Changing the Shared Cache configuration does not purge previously cached content. Existing cached objects remain available until their cache duration expires.
---
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