CV0-002 · Question #359
Which of the following is an example of horizontal scaling?
The correct answer is D. Adding a host to a cluster. Horizontal scaling involves increasing capacity by adding more individual machines or nodes to a system, distributing the workload across multiple resources.
Question
Which of the following is an example of horizontal scaling?
Options
- AMigrating a VM guest from one host to another in a cluster
- BAdding VM guests to a host
- CAdding CPU to a host
- DAdding a host to a cluster
How the community answered
(39 responses)- A3% (1)
- B3% (1)
- C8% (3)
- D87% (34)
Why each option
Horizontal scaling involves increasing capacity by adding more individual machines or nodes to a system, distributing the workload across multiple resources.
Migrating a VM guest from one host to another in a cluster is typically done for load balancing or maintenance, not to increase the cluster's overall capacity.
Adding VM guests to an existing host increases the workload on that single host and is not an example of scaling the underlying infrastructure horizontally.
Adding CPU to a host is an example of vertical scaling, or scaling up, where the resources of an existing single machine are increased.
Adding a host to a cluster is an example of horizontal scaling, also known as scaling out, where more independent computing units (servers) are added to increase the overall capacity and handle a greater load.
Concept tested: Horizontal vs. vertical scaling
Source: https://learn.microsoft.com/en-us/azure/architecture/guide/design-principles/scale-out
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