# Modify Cluster Attributes

Once the MongoDB cluster is up and running, you can customize several attributes.

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**Note:** The user management for IONOS Cloud MongoDB clusters happens completely via the [API](https://api.ionos.com/docs/mongodb/v1/#tag/Users). Creation or modification of users from within MongoDB itself is not allowed. For more information, see [<mark style="color:blue;">User Management</mark>](https://docs.ionos.com/sections-test/guides/databases/mongodb/api/v1-api/users-management).
{% endhint %}

## Quick Links

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><mark style="color:blue;"><strong>Rename a MongoDB Cluster</strong></mark></td><td>Learn how to rename your MongoDB cluster.</td><td><a href="modify-cluster-attributes/rename-a-mongodb-cluster">rename-a-mongodb-cluster</a></td></tr><tr><td><mark style="color:blue;"><strong>Upgrade the MongoDB Version</strong></mark></td><td>Learn how to upgrade the MongoDB version.</td><td><a href="modify-cluster-attributes/upgrade-the-mongodb-version">upgrade-the-mongodb-version</a></td></tr><tr><td><mark style="color:blue;"><strong>Set MongoDB Maintenance Windows</strong></mark></td><td>Learn how to set maintenance windows for your MongoDB cluster.</td><td><a href="modify-cluster-attributes/set-mongodb-maintenance-windows">set-mongodb-maintenance-windows</a></td></tr><tr><td><mark style="color:blue;"><strong>Scale a MongoDB Cluster Vertically</strong></mark></td><td>Learn how to scale your MongoDB cluster vertically by adjusting RAM and CPU.</td><td><a href="modify-cluster-attributes/scale-a-mongodb-cluster-vertically">scale-a-mongodb-cluster-vertically</a></td></tr><tr><td><mark style="color:blue;"><strong>Scale a MongoDB Cluster Horizontally</strong></mark></td><td>Learn how to scale your MongoDB cluster horizontally by adding replicas.</td><td><a href="modify-cluster-attributes/scale-a-mongodb-cluster-horizontally">scale-a-mongodb-cluster-horizontally</a></td></tr><tr><td><mark style="color:blue;"><strong>Increase MongoDB Cluster Shards</strong></mark></td><td>Learn how to increase the number of shards in your MongoDB cluster.</td><td><a href="modify-cluster-attributes/increase-mongodb-cluster-shards">increase-mongodb-cluster-shards</a></td></tr></tbody></table>