DPOD software updates are available from time to time and include enhancements, security updates, component upgrade, bug fixes, etc.

...

Upgrading a Cell Environment

To upgrade a cellenvironment:

1. Make sure the entire cell is up and running. Upgrading is possible only if the cell is healthy.

2. Upgrade the cell manager.
   When the cell manager upgrade is complete, only the following services should be up and running - MonTier-Derby, MonTier-es-raw-trans-Node-1/2/3/4 (the Web Console will be unavailable).
   Do not start the other services manually on the cell manager unless requested explicitly.

3. Upgrade all cell members (can be done in parallel).

4. When the cell members upgrade is complete, start the cell manager services using the app-util.sh ("Start All").

Copy the Software Update Files to DPOD Server

...

Some versions make changes to the installer file itself (MonTierUpdateInstaller.sh). In that case, the following message will be displayed, and the installer should be rerun manually:

Found new version of the software update installer... updating
Software update installer was updated successfully.

Important !!! Please run the software update installer again.

...

If the upgrade process detects data that should be migrated before applying the upgrade, the following message will be displayed, and the data migration tool should be run manually:

Some of the existing data needs to be migrated to a newer format or structure.
The data migration tool has been deployed in /installs/data-migration-tool.
Further information can be found in the documentation at: Admin Guide -> Upgrade

...