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NS0-157 · Question #397

Which statement describes a MetroCluster environment in clustered Data ONTAP?

The correct answer is D. A single HA pair stretched across sites using extended cables.. A stretch MetroCluster in clustered ONTAP is a single HA pair whose two nodes are located at separate sites and connected directly using extended long-distance cables.

Data Protection and High Availability

Question

Which statement describes a MetroCluster environment in clustered Data ONTAP?

Options

  • AA single cluster at each site interconnected using FC switches and Ethernet switches.
  • BA single cluster at each site interconnected using FC switches only.
  • CA single HA pair cabled across sites using FC switches.
  • DA single HA pair stretched across sites using extended cables.

How the community answered

(27 responses)
  • B
    4% (1)
  • C
    4% (1)
  • D
    93% (25)

Why each option

A stretch MetroCluster in clustered ONTAP is a single HA pair whose two nodes are located at separate sites and connected directly using extended long-distance cables.

AA single cluster at each site interconnected using FC switches and Ethernet switches.

Separate clusters at each site interconnected by FC and Ethernet switches describes a fabric MetroCluster variant, not the stretch single-HA-pair topology.

BA single cluster at each site interconnected using FC switches only.

FC switches only between sites describes fabric MetroCluster, and the mention of a separate cluster at each site is incorrect for either MetroCluster variant.

CA single HA pair cabled across sites using FC switches.

While a single HA pair cabled across sites is partially accurate, stretch MetroCluster uses direct extended cables, not FC switches, making this description incorrect.

DA single HA pair stretched across sites using extended cables.Correct

Stretch MetroCluster uses one HA pair with each controller node physically placed at a different site, linked by direct extended SAS or FC cables rather than FC switches. This cable-based topology is what distinguishes stretch MetroCluster from fabric MetroCluster, which requires FC switches between sites for inter-node communication.

Concept tested: MetroCluster stretch topology vs fabric topology

Source: https://docs.netapp.com/us-en/ontap-metrocluster/install-stretch/concept_stretch_mcc_configuration.html

Topics

#MetroCluster#HA pair#FC switches#site interconnect

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