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swaldmann merged 1 commit into from
Mar 10, 2026
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Document cds up --overlay #2444

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21 changes: 21 additions & 0 deletions guides/deploy/to-cf.md
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Expand Up @@ -331,6 +331,27 @@ It is **essential to regularly update dependencies** to consume latest bug fixes
We recommend setting up [Dependabot](https://docs.github.com/en/code-security/dependabot), [Renovate](https://docs.renovatebot.com/) or similar automated solutions to update dependencies **one-by-one** to easily identify breaking changes, minimize risks, and ensure continuous compatibility and **stability of your application**.


### Use MTA Extensions with `cds up`

For Cloud Foundry deployments, you can pass an [MTA extension descriptor](https://help.sap.com/docs/btp/sap-business-technology-platform/defining-mta-extension-descriptors) to `cds up` using `--overlay`:

```sh
cds up --overlay .deploy/eu10-prod.mtaext
```

This allows you to keep landscape-specific deployment settings outside your base _mta.yaml_, for example, scaling parameters:

```yaml [eu10-prod.mtaext]
_schema-version: 3.3.0
ID: bookshop-eu10-prod
extends: bookshop

modules:
- name: bookshop-srv
parameters:
instances: 2
```

## Upgrade Tenants {.java}

The CAP Java SDK offers `main` methods for Subscribe/Unsubscribe in the classes `com.sap.cds.framework.spring.utils.Subscribe/Unsubscribe` that can be called from the command line. This way, you can run the tenant subscribe/unsubscribe for the specified tenant. This triggers your custom handlers, which is useful for local testing scenarios.
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