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2V0-622 · Question #63

Which statement is true for the Path Selection Plug-In VMW_PSP_MRU?

The correct answer is D. VMW_PSP_MRU will have no preferred path setting for the Plug-In. VMW_PSP_MRU (Most Recently Used) has no preferred path setting - it simply uses the last active path and switches only on failure, unlike VMW_PSP_FIXED which supports a designated preferred path.

Section 3 – Configure and Administer vSphere 6.5 Storage

Question

Which statement is true for the Path Selection Plug-In VMW_PSP_MRU?

Options

  • AVMW_PSP_MRU is default for a majority of active-active and active-passive arrays.
  • BVMW_PSP_MRU will remain on the selected path even if the state were to change.
  • CVMW_PSP_MRU is recommended for Virtual SAN.
  • DVMW_PSP_MRU will have no preferred path setting for the Plug-In.

How the community answered

(43 responses)
  • A
    2% (1)
  • B
    5% (2)
  • C
    5% (2)
  • D
    88% (38)

Why each option

VMW_PSP_MRU (Most Recently Used) has no preferred path setting - it simply uses the last active path and switches only on failure, unlike VMW_PSP_FIXED which supports a designated preferred path.

AVMW_PSP_MRU is default for a majority of active-active and active-passive arrays.

VMW_PSP_MRU is the default for active-passive arrays only; active-active arrays typically use VMW_PSP_RR (Round Robin) for load distribution.

BVMW_PSP_MRU will remain on the selected path even if the state were to change.

VMW_PSP_MRU does switch paths when the current path state changes to dead or unavailable - it does not remain on a failed path.

CVMW_PSP_MRU is recommended for Virtual SAN.

VMW_PSP_MRU is not recommended for Virtual SAN, which uses a software-defined storage stack that does not rely on traditional hardware multipathing PSPs.

DVMW_PSP_MRU will have no preferred path setting for the Plug-In.Correct

VMW_PSP_MRU selects whichever path was most recently used and holds it until that path becomes unavailable, at which point it selects another path and stays on it. There is no concept of a 'preferred path' in MRU - that feature belongs exclusively to VMW_PSP_FIXED. Administrators cannot designate a specific path as preferred when using the MRU plug-in.

Concept tested: VMW_PSP_MRU path selection plug-in characteristics

Source: https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-storage/GUID-CF5E5E90-5A72-47A4-84C0-47B935F8E2DE.html

Topics

#PSP#VMW_PSP_MRU#multipathing#path selection

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