NS0-157 · Question #54
A customer wants different performance characteristics for applications that are using LUNs. They want to control the performance for FCP LUNs. Which two clustered Data ONTAP features foQoS would…
The correct answer is A. setting the policy group for the SVM that is hosting the LUNs for the customer's application B. setting the policy group for the volumes that are hosting the LUNs for the customer's applications. In clustered ONTAP, QoS policy groups can be applied at the SVM level and the volume level to throttle I/O for FCP LUNs hosted within those objects.
Question
A customer wants different performance characteristics for applications that are using LUNs. They want to control the performance for FCP LUNs. Which two clustered Data ONTAP features foQoS would you use to accomplish this task? (Choose two.)
Options
- Asetting the policy group for the SVM that is hosting the LUNs for the customer's application
- Bsetting the policy group for the volumes that are hosting the LUNs for the customer's applications
- Csetting the policy group for the FCP target ports that are being used for the LUNs
- Dsetting the policy group for the igroups mapped to the LUNs that are hosting the customer's
How the community answered
(35 responses)- A86% (30)
- C9% (3)
- D6% (2)
Why each option
In clustered ONTAP, QoS policy groups can be applied at the SVM level and the volume level to throttle I/O for FCP LUNs hosted within those objects.
Assigning a QoS policy group to the SVM applies throughput limits to all workloads within that SVM, including every FCP LUN it hosts, making it a valid and broad control point for per-application performance management.
Assigning a QoS policy group directly to the volume that contains the LUN limits I/O at the volume level, providing granular per-workload performance control without affecting other volumes in the SVM.
FCP target ports are logical network endpoints used for connectivity and do not support QoS policy group assignments in ONTAP - QoS operates on storage objects such as volumes, SVMs, and LUNs, not on protocol ports.
igroups (initiator groups) are used strictly for LUN masking and host access control, not for performance management - ONTAP QoS policy groups cannot be assigned to igroup objects.
Concept tested: ONTAP QoS policy group assignment for FCP LUNs
Source: https://docs.netapp.com/us-en/ontap/performance-admin/assign-policy-group-task.html
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