# How are my VMs and Applications billed?

### What happens when I stop a Virtual Machine or Applications from the Denvr console?

When you stop a VM or App via the Denvr console:

* All compute resources and ephemeral storage are deallocated.
* Persisted storage continues to incur charges until explicitly removed by the user.

***

### Does stopping a Virtual Machine or Application from inside the OS (e.g., using `shutdown`) stop billing?

No - stopping from within the guest OS **does not** deallocate compute resources. The instance remains in an active, billable state. You must stop it using the **Denvr console** or APIs to halt compute billing.

***

### What are the differences in billing between VMs and Apps when stopped?

| Feature                       | Virtual Machines (VMs)                              | Applications (Apps)                  |
| ----------------------------- | --------------------------------------------------- | ------------------------------------ |
| Stoppable from Console        | Yes                                                 | Yes                                  |
| Compute charges while stopped | No                                                  | No                                   |
| Root storage                  | Persistent root disk (billed)                       | Ephemeral root\_FS (not billed)      |
| Filesystem storage            | Billed until data is removed                        | Billed until data is removed         |
| Storage billed while stopped  | Yes (root disk and filesystems)                     | Yes (filesystems only)               |
| Storage deletion behavior     | Root disk deleted on VM delete; filesystems persist | Filesystems persist after App delete |

***

### What storage types are billed when a Virtual Machine is stopped?

| Storage Type      | Billed While Running | Billed While Stopped | Deleted When                             |
| ----------------- | -------------------- | -------------------- | ---------------------------------------- |
| Root Disk         | Yes                  | Yes                  | When the VM is deleted                   |
| Filesystems       | Yes                  | Yes                  | When user deletes data inside filesystem |
| Ephemeral Storage | No                   | No                   | Discarded on stop                        |

***

### What storage types are billed when an Application is stopped?

| Storage Type         | Billed While Running | Billed While Stopped | Deleted When                             |
| -------------------- | -------------------- | -------------------- | ---------------------------------------- |
| Root\_FS (ephemeral) | Included in compute  | Not applicable       | Discarded on stop                        |
| Filesystems          | Yes                  | Yes                  | When user deletes data inside filesystem |
| Ephemeral Storage    | No                   | No                   | Discarded on stop                        |

***

### If I delete a Virtual Machine or Application, will all storage charges stop?

Not necessarily.

* For **VMs**, deleting the instance also deletes the **root disk**, but any attached **filesystems persist** and continue to incur charges unless the user deletes the data within them.
* For **Apps**, the **ephemeral root\_FS** is discarded automatically, but **filesystems persist** and continue to be billed until emptied.

***

### How do I stop being billed for persisted storage?

You must **delete the data** within any mounted filesystems. Simply deleting the VM or App will not remove or unbill filesystem storage.

***

### Can I snapshot or back up my data?

Not at this time.\
\
Denvr does **not** provide a user-accessible way to snapshot or back up data. If data is deleted, it cannot be recovered.

Although the platform performs internal storage replication for fault tolerance within a failure domain, this is not user-controlled and does not affect billing.

***

### Where can I monitor my usage and costs?

Use the **Cost and Usage → Cost Explorer** screen in the Denvr console to track your current charges.

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Note: **Reserved compute charges** are billed manually and are **not yet visible** in Cost Explorer. Full cost integration is planned in a future release.

***

### Summary

* Use the **Denvr console** to stop VMs or Apps in order to deallocate compute and ephemeral storage.
* **Persisted storage** is the only component billed while an instance is stopped.
* **VM root disks** are deleted when the VM is deleted.
* **Filesystems** persist after instance deletion and must be manually cleared to stop billing.
* No backup or snapshot capability is currently available to users.


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