AZ-140 Question #323: Real Exam Question with Answer & Explanation

Question

An organization uses breadth-first load balancing. During a non-typical weather-related event, an unexpectedly high number of users logged onto WVD to work remotely. During this time, users complained of slowness and applications crashing. What would you do to prevent performance issues for a higher than expected number of users?

Options

• ASet the Host Pool max session limit and change the load balancing algorithm to depth-first.
• BSet the Host Pool Max Session limit.
• CImplement an auto-scale solution to scale up the session hosts at the time of high activity.
• DDouble the number of session hosts to accommodate a greater number of users.

Explanation

To prevent performance issues during unexpectedly high user activity with breadth-first load balancing, implementing an auto-scale solution is the most effective approach as it dynamically adds session hosts to meet increased demand.

Common mistakes.

• A. Setting a max session limit prevents individual hosts from being overloaded but does not increase overall capacity, and changing to depth-first load balancing would concentrate users on fewer hosts, potentially worsening the experience for some and not solving the overall capacity issue.
• B. Setting a Host Pool Max Session limit only prevents individual hosts from being oversaturated; it does not scale out the environment to accommodate a higher-than-expected number of users, which could lead to users being denied access.
• D. Doubling the number of session hosts provides a static increase in capacity but is inefficient for non-typical, temporary peaks as it results in increased costs for unused resources during normal operating hours.

Concept tested. Azure Virtual Desktop host pool scaling and load balancing

Reference. https://learn.microsoft.com/en-us/azure/virtual-desktop/autoscale-scaling-plan

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