Product:
Planning Analytics 2.0.9.19
Microsoft Windows 2019 server

Issue:

What does the .cub$ files in the data folder mean? They increase the zip file for the backup rather much.

Solution:
They are left over from a crashed SaveDataAll function. Did you have a hung TM1 instance recently?

They’re generated when you do a data save. The cube in memory is initially saved to the .cub$ file. If the save is successful then the .cub file is replaced by the .cub$ file and the latter is deleted.

If the file is still there then either:
– You’re currently doing a data save in which case deleting the file would be highly inadvisable; or
– It’s left over from a past failed data save, in which case it can be deleted. (you might want to take a backup of the files before you delete it)

More Information:

https://www.ibm.com/support/pages/savedataall-best-practices 

https://exploringtm1.com/tm1-file-extensions-understand-the-files-in-your-tm1-model/

https://www.ibm.com/docs/en/planning-analytics/2.1.0?topic=smtf-savedataall