Which two statements are true for Predictive DRS? (Choose two.)
A.
It balances resource utilization for virtual machines with unpredictable utilization patterns.
B.
It integrates DRS with vRealize Operations Manager to balance workloads for virtual machines before
resource utilization spikes occur.
C.
It balances resource utilization based on a threshold’s algorithm that runs each night.
D.
It determines the best placement and balance of virtual machines based on a threshold’s algorithm that
runs each night in vCenter Server 6.5 Database.
Explanation:
http://vmpro.at/learning-more-about-predictive-drs/
B,D – OK
https://blogs.vmware.com/management/2016/11/predictive-drs.html
B,C – OK
Predictive DRS using a combination of DRS and vRealize Operations Manager to predict future demand and determine when and where hot spots will occur. When future hot spots are found, Predictive DRS moves the workloads long before any contention can occur.
Each night it runs its Dynamic Threshold calculations which uses sophisticated analytics to create a band of what is “normal” for each metric/object combination
What is the difference between C and D? an algorithm be running in database? I still feel more B,C… ???
I agree with B and C because the algorithm is not based in the vcenter database, but vROps data….
B
and C (I think) … D sounds possible, but I cannot find any documentation that says it runs the algorithm “in the database”. Also, I cannot see anywhere where it says that predictive DRS does anything with initial placement.
So my answer is BC
Maybe they meant the vRops database. But still D would be wrong. Going for BC instead.
B,C
https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2135747
I would go with B and C as well. There is nothing in Predictive DRS that runs nightly on the vCenter database.
B,C
From
https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/whitepaper/vsphere/vmw-white-paper-vsphr-whats-new-6-5.pdf
page 30/36 :
Resource Management Enhancements
Predictive DRS
Predictive DRS is a new feature that leverages the predictive analytics of vRealize Operations Manager with
the powerful resource scheduler algorithm of vSphere DRS. Together, these two products enable workload
balancing for certain VMs before resource utilization spikes occur, potentially eliminating a great amount of
resource contention that might have occurred in the past.
vRealize Operations Manager runs its dynamic thresholds algorithm nightly against the VMs on which it
collects data. These dynamic thresholds create forecasted metrics for the future utilization of the VMs.
The metrics are then passed to vSphere DRS to determine the best placement and balance of VMs before
resource utilization spikes occur. Predictive DRS helps prevent resource contention on hosts that run VMs
with predictable utilization patterns.
It’s B and D. Wording for D is the same as below from vmware document.
vRealize Operations Manager runs its dynamic thresholds algorithm nightly against the VMs on which it
collects data. These dynamic thresholds create forecasted metrics for the future utilization of the VMs.
The metrics are then passed to vSphere DRS to determine the best PLACEMENT and BALANCE of VMs before
resource utilization spikes occur.
We do not like choice D due to using the “Database” keyword
Nothing runs on the DB and has nothing to do with it