The ______ is more logical for virtual machine sizing.

You are a VMware architect employed to design and build application environments and the
underlying platform for a software development company. The company is using a “devops”
approach and has engaged with you at the beginning of the first planning meeting/pre-sprint.
The software has yet to be written. However, you have some high-level specifications that are
subject to change at each of the early meetings.
The ______ is more logical for virtual machine sizing.

A.
predictive sizing approach based on current software

B.
adaptive sizing approach

Explanation:

There are two types of scaling approaches in virtual platforms: adaptive and predictive.
Bothapproaches are usable; however, a designer must work out which is the best approach for
each project.
The adaptive approach to guest virtual machine design is a major advantage that virtualization

technologybrings to a datacenter. It allows a guest virtual machine to be created initially on a few
metrics or high-levelrequirements (such as a limited budget) and scaled (that is, grown, not
shrunk) through the virtual machine lifecycle. In many cases, this scaling can be performed hot/live
without outage/downtime to the runningapplications.
The predictive approach, on the other hand, requires more planning and research, and you must
know themetrics before deployment. The advantage here is that once the virtual machine has
been deployed, onlyapplication maintenance is required. The application requirements are known.
Chapter 5, Design Approaches