nerdexam
Network_Appliance

NS0-157 · Question #140

What is considered when selection LS mirror copy? (choose three)

The correct answer is A. If an LS mirror copy is on the same node as the network module that fields the request, the C. if no LS mirror copy is on the same node as the network module that fields the request, the D. If a write request goes to LS mirror, it returns error. Load Sharing (LS) mirror selection prioritizes node locality for read efficiency and strictly rejects write requests with an error because LS mirrors are read-only replicas.

Data Protection and High Availability

Question

What is considered when selection LS mirror copy? (choose three)

Options

  • AIf an LS mirror copy is on the same node as the network module that fields the request, the
  • BIf a write request goes to LS mirror, It forward it to flexvol
  • Cif no LS mirror copy is on the same node as the network module that fields the request, the
  • DIf a write request goes to LS mirror, it returns error.

How the community answered

(32 responses)
  • A
    78% (25)
  • B
    22% (7)

Why each option

Load Sharing (LS) mirror selection prioritizes node locality for read efficiency and strictly rejects write requests with an error because LS mirrors are read-only replicas.

AIf an LS mirror copy is on the same node as the network module that fields the request, theCorrect

Node locality is the primary selection factor - if an LS mirror copy resides on the same node as the network interface (LIF) that received the client request, that local copy is selected to avoid inter-node traffic and reduce latency.

BIf a write request goes to LS mirror, It forward it to flexvol

LS mirrors do not forward write requests to the source FlexVol - they are read-only replicas with no write-proxy capability, and directing a write to them results in an error, not a transparent forward.

Cif no LS mirror copy is on the same node as the network module that fields the request, theCorrect

When no LS mirror copy is local to the node receiving the request, the system evaluates mirrors on other nodes and selects one based on load distribution rules to serve the read request.

DIf a write request goes to LS mirror, it returns error.Correct

LS mirror volumes are strictly read-only; they do not proxy or forward write requests to the source FlexVol, so any write directed to an LS mirror is rejected and an error is returned to the client.

Concept tested: Load Sharing mirror copy selection criteria in ONTAP

Source: https://docs.netapp.com/us-en/ontap/smb-admin/configure-namespace-junction-points-task.html

Topics

#LS mirror#load-sharing mirror#read requests#write behavior

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion
Full NS0-157 Practice