When configuring Tableau Server for use with a load balancer, what is an essential consideration to ensure effective load distribution and user…

When deploying a multi-node Tableau Server cluster behind a load balancer, user session consistency is critical. A user's session is established on a specific node (e.g., one running the VizQL Server process). If subsequent requests from that same user are routed to a different node, the session context is lost, which can force re-authentication or cause errors. Enabling "sticky sessions" (also known as session persistence or affinity) on the load balancer ensures that all requests from a particular client are directed to the same backend server for the duration of the session, preserving a seamless user experience.

A: A standard round-robin method without sticky sessions would break user sessions by distributing requests from the same user across different nodes.

C: Redirecting write operations is not a standard load balancing technique for ensuring session consistency in Tableau Server.

D: Network topology choices like using a separate subnet are for network organization or security, and do not directly enable user session consistency.

1. Tableau Server Documentation. (2023). Add a Load Balancer. Tableau Help. Retrieved from https://help.tableau.com/current/server/en-us/distriblb.htm. (Section: "Configure load balancer for sticky sessions" explicitly states

"Configure your load balancer for sticky sessions. Sticky sessions ensure that a user is connected to the same Tableau Server throughout a session.")

2. Tableau Server Documentation. (2023). Tableau Server Gateway. Tableau Help. Retrieved from https://help.tableau.com/current/server/en-us/gateway.htm. (This document discusses the role of the gateway and its interaction with load balancers

implicitly requiring session persistence for stateful user interactions.)