Question-52: Horizontal scaling, also known as scaling out, is the process of augmenting your existing infrastructure with extra nodes or servers in order to meet growing demand. If you discover that the server you are using to host an application no longer has the capacity or capability to manage the traffic, the answer may be to add another server to the mix. It is necessary for you to upload an application to Google Cloud. The programme is capable of reading and writing data to the filesystem, in addition to receiving communication through TCP. Scaling in a horizontal direction is not supported by the programme. Due to the fact that concurrent access results in data corruption, the application process has to have complete control over the data stored on the file system. The company is prepared to tolerate some downtime in the event that an incident takes place; but, in order to support their commercial activities, the application must remain accessible around the clock. On Google Cloud, you will need to create the architecture of this application. What action should you take?
A. Make use of Cloud Filestore, a managed instance group with instances located in several zones, and an HTTP load balancer placed in front of the instances.
B. Make use of a managed instance group that contains instances that are located in several zones, make use of Cloud Filestore, and make use of a network load balancer in front of the instances.
C. Make use of a regional persistent disc, an HTTP load balancer in front of the instances, and an unmanaged instance group with an active and standby instance located in separate zones.
D. Make advantage of a regional persistent disc, a network load balancer in front of the instances, and an unmanaged instance group with an active and standby instance located in separate zones.
Correct Answer
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: 4 Explanation: Option 4 Because the traffic is TCP, Options 1 and 3 cannot be used because HTTPS load balancing is not enabled. This leaves just Option 4. Option 2: The file storage solution is a cloud-based firestore, which does not provide complete control and is thus ruled out. Option 4 (an unmanaged instance group) provides the appropriate level of complete control for the migration process. This option also includes a network load balancing and regional permanent disc storage. Almost everything useful, with the exception of file storage, is not Cloud Firestore; instead, it is a new service for sharing filesystems across virtual machines (like a NAS in a traditional infrastructure). This is why, as well as the supporting documents. Cloud Filestore enables concurrent access, yet the condition in the question states that complete control must be exercised over the data stored on the file system. This is due to the fact that concurrent access leads to data corruption. This rules out the second option.