You can restore a component from the file you created when backing
  up that component. You do this with the restore command.
Note that the restore command:
- Uses the specified backup file or gets the latest backup file, if a filename was not specified.
- Ensures that the component's data directories are empty.
- Stops the component. You must explicitly restart the component after a restore.
This section describes how to use the restore command.
To restore a component from a backup file:
- Ensure that the following directories are empty:
      /opt/apigee/data/component_name /opt/apigee/etc/component_name.d If they are not empty, delete their contents using commands like the following: rm -r /opt/apigee/data/component_name rm -r /opt/apigee/etc/component_name.d
- Restore the previous configuration and data by using the following command:
      /opt/apigee/apigee-service/bin/apigee-service component_name restore backup_file Where: - component_name is the name of the component. Possible values include:
          
- apigee-cassandra(Cassandra)
- apigee-openldap(OpenLDAP)
- apigee-postgresql(PostgreSQL database)
- apigee-qpidd(Qpidd)
- apigee-sso(Edge SSO)
- apigee-zookeeper(ZooKeeper)
- edge-management-server(Management Server)
- edge-management-ui(new Edge UI)
- edge-message-processor(Message Processor)
- edge-postgres-server(Postgres Server)
- edge-qpid-server(Qpid Server)
- edge-router(Edge Router)
- edge-ui(Classic UI)
 
- backup_file is the name of the file you created when you
          backed up that component; this value does not include
          the path, but does include the "backup-" prefix and file extensions. For example,
          backup-2019.03.17,14.40.41.tar.gz.
 
- component_name is the name of the component. Possible values include:
          
- Restart the component, as the following example
      shows:
      /opt/apigee/apigee-service/bin/apigee-service component_name start 
For example:
/opt/apigee/apigee-service/bin/apigee-service apigee-cassandra restore backup-2019.03.17,14.40.41.tar.gz
Specifying backup_file is optional. If omitted, Apigee uses the most recent file
      in /opt/apigee/backup/component_name.
The restore command re-applies the backed up configuration and restores the
      data from when the backup took place.