> For the complete documentation index, see [llms.txt](https://docs.ionos.com/mongodb-sdk-java/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ionos.com/mongodb-sdk-java/models/createclusterproperties.md).

# CreateClusterProperties

The properties with all data needed to create a new MongoDB cluster.

## Properties

| Name                  | Type                                                                   | Description                                                                                                                                                                                                                                                                      | Notes       |
| --------------------- | ---------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------- |
| **templateID**        | **String**                                                             | The unique ID of the template, which specifies the number of cores, storage size, and memory. You cannot downgrade to a smaller template or minor edition (e.g. from business to playground). To get a list of all templates to confirm the changes use the /templates endpoint. |             |
| **mongoDBVersion**    | **String**                                                             | The MongoDB version of your cluster.                                                                                                                                                                                                                                             | \[optional] |
| **instances**         | **Integer**                                                            | The total number of instances in the cluster (one primary and n-1 secondaries).                                                                                                                                                                                                  |             |
| **connections**       | [**List\<Connection>**](/mongodb-sdk-java/models/connection.md)        |                                                                                                                                                                                                                                                                                  |             |
| **location**          | **String**                                                             | The physical location where the cluster will be created. This is the location where all your instances will be located. This property is immutable.                                                                                                                              |             |
| **displayName**       | **String**                                                             | The name of your cluster.                                                                                                                                                                                                                                                        |             |
| **maintenanceWindow** | [**MaintenanceWindow**](/mongodb-sdk-java/models/maintenancewindow.md) |                                                                                                                                                                                                                                                                                  | \[optional] |