MongoDB is a source-available cross-platform document-oriented database program for high-volume storage. Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas.
To upgrade your MongoDB cluster to the latest version, go to the cluster’s Overview page. Scroll down to the Current Version section and click the Show Available Upgrade button. If you do not see this button, the cluster is already on the latest version.
This opens the Version Upgrade menu. Select the version you want to upgrade the cluster to, then click Upgrade Now. Once you start an upgrade, you cannot cancel it or downgrade your cluster after upgrading it.
This returns you to the Overview page, where under the Current Version section, a loading symbol appears with the text “Database cluster is upgrading.” When the upgrade process finishes, the loading symbol disappears and the section reads “Version upgrades are in place and won’t disrupt your service.”