Using QoS statistics for a group of volumes on one node, you notice that most of the latency comes from the data layer.
In this scenario, which statement is correct?
A. There is too much indirect traffic from other nodes.
B. QoS processing is increasing CPU usage.
C. The CPU on the node is overused.
D. High disk use is increasing CPU usage.
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Correct Answer: C
Data Layer: – Average latency contribution of the clustered Data ONTAP proprietary file system, known as WAFL. After the operation has been transported by the underlying protocols, it will be processed by WAFL and the response is returned to the protocols for delivery as rapidly as possible.
https://kb.netapp.com/app/answers/answer_view/a_id/1031202/~/how-to-troubleshoot-performance-issues-in-both-clustered-data-ontap-and-data