KNOWLEDGE BASE

Backup Files Smaller Than Expected


Published: 06 Jun 2014
Last Modified Date: 04 May 2016

Issue

When reviewing files from regular Tableau Server backups, more recent files might be significantly smaller than expected or smaller than previous backup files.

Environment

Tableau Server

Resolution

  • Ensure that that primary Tableau Server computer has enough disk space to back up the dataengine folder.
  • Verify that large extracts are completing prior to the backup.

Cause

  • Not enough space to prepare backup file on the primary Tableau Server computer. This computer should have at least two times more free disk space (4 times more is recommended) than "C:\ProgramData\Tableau\Tableau Server\data\tabsvc\dataengine" folder on a computer with Active Data Engine.
  • A refresh job is failing. If a refresh extract job is failing, the old .tde file may have been removed from the dataengine folder without the new one taking its place.

Additional Information

  • In general, actual .tsbak file is smaller than the dataengine folder due to compression. To verify that dataengine folder is correctly backed up, open the .tsbak file with any archiving software (7zip, WinZip, etc.) and verify the size of dataengine folder
  • Backup size can also go down, if users removed one or more workbooks with large extracts.
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