CV0-002 · Question #288
A cloud administrator is analyzing usage trends for a website housed within an IaaS cloud platform. The administrator notices that traffic and visitors to the site quadrupled from the normal baseline
The correct answer is D. Implement an outward horizontal scaling solution.. To handle a temporary quadrupling of website traffic in an IaaS cloud with a load balancer and standardized VMs, the most efficient solution without downtime is to add more instances.
Question
A cloud administrator is analyzing usage trends for a website housed within an IaaS cloud platform. The administrator notices that traffic and visitors to the site quadrupled from the normal baseline during the holiday season. The environment has a load balancer that uses standardized VMs to host the applications. Given this scenario, which of the following would be the MOST efficient, provide no downtime, and address the temporary spike in traffic?
Options
- AImplement an upward vertical scaling solution.
- BImplement a downward vertical scaling solution.
- CImplement an inward horizontal scaling solution.
- DImplement an outward horizontal scaling solution.
How the community answered
(25 responses)- A8% (2)
- B4% (1)
- C16% (4)
- D72% (18)
Why each option
To handle a temporary quadrupling of website traffic in an IaaS cloud with a load balancer and standardized VMs, the most efficient solution without downtime is to add more instances.
Implementing an upward vertical scaling solution (increasing resources of existing VMs) often requires a VM restart or downtime for resource allocation changes, making it less suitable for a no-downtime scenario and large, sudden spikes.
Implementing a downward vertical scaling solution (decreasing resources of existing VMs) is used for reducing capacity, not increasing it to handle a traffic spike.
Implementing an inward horizontal scaling solution (removing instances) is used for reducing capacity when traffic decreases, not for addressing a temporary spike.
Implementing an outward horizontal scaling solution involves adding more standardized VMs (instances) behind the load balancer, which efficiently distributes the increased traffic across new resources. This method provides no downtime because existing VMs continue to serve requests while new ones are provisioned, effectively addressing temporary traffic spikes by increasing capacity dynamically.
Concept tested: Cloud scalability (horizontal vs. vertical)
Source: https://learn.microsoft.com/en-us/azure/architecture/guide/design-principles/scale-out
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