Question

Please answer following 2 questions
1)There is a nonlinear relationship between the number of processing cores used and power consumption.
(a) True
(b) False
2)When load increases, VM management can be done by
(a) Schedule new VMs to new nodes
(b) Shutdown unused nodes
(c) Schedule new VMs to the same node
(d) None of the above

Answer 1

TL; DR:

1.) TRUE

2.) A

Brief explanation:

1.) Please take a look at the two graphs:

These are two graphs of power consumption vs. number of cores used, made for the two sub-category of processors, which were used in Samsung smart phones.

Also, if you watch other processors like dual-core, octacore et cetera there is a non-linear relation between power consumption and the processor usage. Although these tests are synthetic, that is, under a controlled load and other prerequisite data, they result don’t follow a linear path.

For more detailed information:

https://www.anandtech.com/show/8718/the-samsung-galaxy-note-4-exynos-review/6

https://www.anandtech.com/show/8718/the-samsung-galaxy-note-4-exynos-review/4

2.) According to the basic logic of “load versus processor”, if one is to add another process on a processor, the management of a process become more complex. The complexity also depends on the type of algorithm/scheduling used. So, extrapolating this logic to the question, if one engages a VM on a same node, while on increased work load, it won’t make sense. Already increased work load calls for scheduling a VM   to the new node, if only the already existing node has reached maximum resource usage

Answer 2

1 .There is a non linear relationship between the number of processing cores used and the power consumption.

The above statement is ( a ) True.

2 .When load increases, VM management can be done by scheduling new VMs to the same node.

The answer to the second question is ( c ).