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NS0-157 · Question #134

Clustered Data ONTAP 8.2 or later Quality of Service (QoS) Policies have which three characteristics?

The correct answer is A. A LUN's QoS policies can be changed dynamically B. A QoS policy can be decreased C. A QoS policy can be increased. Tests understanding of QoS policy group behavior, supported storage objects, and dynamic management capabilities in clustered Data ONTAP 8.2.

Performance, Troubleshooting, and Security

Question

Clustered Data ONTAP 8.2 or later Quality of Service (QoS) Policies have which three characteristics?

Options

  • AA LUN's QoS policies can be changed dynamically
  • BA QoS policy can be decreased
  • CA QoS policy can be increased
  • DA Qtree's QoS policies can be changed dynamically
  • EA volume can be a member of two QoS policies

How the community answered

(29 responses)
  • A
    76% (22)
  • D
    10% (3)
  • E
    14% (4)

Why each option

Tests understanding of QoS policy group behavior, supported storage objects, and dynamic management capabilities in clustered Data ONTAP 8.2.

AA LUN's QoS policies can be changed dynamicallyCorrect

LUN QoS policy assignments can be changed dynamically in clustered Data ONTAP 8.2 without disrupting active I/O, allowing administrators to reassign LUNs to different policy groups on the fly.

BA QoS policy can be decreasedCorrect

A QoS policy group's maximum throughput ceiling can be decreased at any time to throttle workload resource consumption, giving administrators flexible downward control over performance limits.

CA QoS policy can be increasedCorrect

A QoS policy group's throughput ceiling can also be increased dynamically to accommodate growing workload demands, making policy management bidirectionally flexible without requiring storage object reconfiguration.

DA Qtree's QoS policies can be changed dynamically

Qtrees are not supported as members of QoS policy groups in clustered Data ONTAP 8.2; only volumes, LUNs, files, and SVMs are valid assignable objects for QoS policies.

EA volume can be a member of two QoS policies

A storage object can belong to only one QoS policy group at a time in ONTAP; assigning an object to a second policy group replaces the existing assignment rather than allowing dual membership.

Concept tested: QoS policy group characteristics and supported object types

Source: https://docs.netapp.com/us-en/ontap/performance-admin/guarantee-throughput-qos-task.html

Topics

#QoS policies#LUN QoS#policy modification#throughput management

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