In implementing a multi-node server upgrade for Tableau Server, what step is vital to secure a smooth upgrade process and maintain data integrity?
A. Disabling user access to Tableau Server until the upgrade is complete on all nodes
B. Conducting a full backup of the server before initiating the upgrade process
C. Immediately applying all available updates to the operating systems of the server nodes be-fore starting the upgrade
D. Removing less critical nodes from the cluster to simplify the upgrade process
B. Conducting a full backup of the server before initiating the upgrade process
Explanation:
Why B is Correct?
A full backup is non-negotiable before any major upgrade to:
Prevent data loss if the upgrade fails.
Enable rollback to the previous version if critical issues arise.
Tableau’s Upgrade Documentation mandates this as the first step.
Why Other Options Are Less Critical?
A. Disabling user access: Necessary during the upgrade but doesn’t protect data integrity.
C. OS updates: Important for security but secondary to backing up Tableau’s repository/data.
D. Removing nodes: Risky—may destabilize the cluster; upgrades should handle nodes sequentially.
Key Steps for a Safe Multi-Node Upgrade:
Upgrade nodes one by one (starting with the primary node).
Validate functionality after each node upgrade.
Reference:
Tableau’s Backup and Recovery Guide.
Final Note:
B is the only step that ensures recoverability. Options A/C/D are procedural but don’t safeguard against catastrophic failure. Always test backups before upgrading!