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Downgrade 6.0 Standalone to 5.0

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  • Downgrade Path
  • Access Control
  • Prerequisites
  • Downgrade Procedure

Before you attempt a downgrade, familiarize yourself with the content in this page.

If you need to downgrade from 6.0, downgrade to the latest patch release of 5.0.

MongoDB only supports single-version downgrades. You cannot downgrade to a release that is multiple versions behind your current release. You may downgrade a 6.0-series to a 5.0-series deployment, however, further downgrading that 5.0-series deployment to a 4.4-series deployment is not supported.

If your deployment has access control enabled, your downgrade user privileges must include privileges to list and manage indexes across databases. A user with root role has the required privileges.

Before you begin the downgrade procedure, you must complete the following prerequisite steps.

Optional but Recommended. Create a backup of your database.

To learn how to create a backup, see MongoDB Backup Methods.

To downgrade from 6.0 to 5.0, you must remove 6.0 features that are incompatible with 5.0. For a list of incompatible features and how to remove them, see Downgrade Considerations.

To downgrade the featureCompatibilityVersion of your standalone instance:

  1. Use mongosh to connect to the mongod instance.

  2. Downgrade the featureCompatibilityVersion to "5.0".

    db.adminCommand( { setFeatureCompatibilityVersion: "5.0" } )

    The setFeatureCompatibilityVersion command performs writes to an internal system collection and is idempotent. If the command does not complete successfully, retry the command on the mongod instance.

Warning

Before proceeding with the downgrade procedure, ensure that the prerequisites have been completed.

1

Using either a package manager or a manual download, get the latest patch release in the 5.0 series. If using a package manager, add a new repository for the 5.0 binaries, then perform the actual downgrade process.

2

Ensure that the 5.0 binaries are in your System PATH. To confirm your binary version, run the following command:

mongod --version

The command output should indicate a 5.0-series release.

3

To shut down the mongod process, use mongosh to connect to the deployment and run the following command:

db.adminCommand( { shutdown: 1 } )
4

Disable any configurable 6.0 features by updating the mongod instance's configuration file before restarting.

To see the list of configurable 6.0 features, review the 6.0 Release Notes.

5

To start a mongod process, run the following command:

mongod --dbpath </path-to-data-folder>

To learn more about starting a mongod process, see Start mongod Processes.

←  Downgrade 6.0 to 5.0Downgrade 6.0 Replica Set to 5.0 →
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