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Question 65

An organization uses a four (4) node customer-hosted Mule runtime cluster to host one (1) stateless API implementation. The API is accessed over HTTPS through a load balancer that uses round-robin for load distribution. Each node in the cluster has been sized to be able to accept four (4) times the current number of requests.

Two (2) nodes in the cluster experience a power outage and are no longer available. The load balancer detects the outage and blocks the two unavailable nodes from receiving further HTTP requests.

What performance-related consequence is guaranteed to happen, on average, assuming the remaining cluster nodes are fully operational?

    Correct Answer: A

    With the load balancer using round-robin distribution, initially, each of the four nodes receives 25% of the incoming requests. When two nodes experience a power outage, the two remaining nodes must handle the total load divided only between them, resulting in each handling 50% of the requests. This leads to a 100% increase in the number of requests received by each remaining node, as they now process double the amount compared to the initial distribution.

Discussion
Outdoor25Option: A

Should be A.

kainzoOption: A

A is correct for round-robin alogrithms

gilofernandesOption: A

In a round-robin load balancing configuration, incoming requests are distributed evenly among the available nodes in the cluster. Initially, with all four nodes operational, each node receives 25% of the incoming requests (4 nodes × 25% = 100% total distribution). When two nodes experience a power outage and are blocked from receiving further requests, the load balancer redistributes the incoming requests to the remaining two nodes. With only two nodes remaining, each of these nodes now receives 50% of the incoming requests (2 nodes × 50% = 100% total distribution). This redistribution results in a 100% increase in the number of requests received by each remaining node, as they now handle twice the workload compared to the initial configuration.

madgeezerOption: A

A. 100% increase in the number of requests received by each remaining node