By default, your MongoDB server is created running the 3.0.11 binary with RocksDB storage engine. You can change the version of your server at anytime
with minimal downtime. A restart of the server is required to complete the upgrade process.
Once you have upgraded the server to a higher version, you cannot downgrade to the previous version.
Step by step guide to upgrade your database server version.
1. Access the upgrade tool from the Task manager by clicking on DB Actions → Ops manager → Upgrade database server.
2. Select the required version from the "Upgrade to" dropdown.
3. Use the upgrade button to initiate the process. A prompt indicating success or a failure should be expected.