2V0-622 · Question #252
Examine the LUN properties that are shown in the exhibit. Which action should be taken to utilize all active paths?
The correct answer is D. Change PSP to Round Robin. To distribute I/O across all active paths to a LUN, the Path Selection Policy must be changed to Round Robin.
Question
Examine the LUN properties that are shown in the exhibit. Which action should be taken to utilize all active paths?
Exhibit
Options
- AChange PSP to Most Recently Used
- BNo actionrequired. All paths are already utilized.
- CChange PSP to Fixed.
- DChange PSP to Round Robin.
How the community answered
(67 responses)- A1% (1)
- B7% (5)
- C3% (2)
- D88% (59)
Why each option
To distribute I/O across all active paths to a LUN, the Path Selection Policy must be changed to Round Robin.
Most Recently Used (MRU) PSP sends all I/O through the single most recently active path and only switches to another path if that path fails, leaving all other active paths idle.
The exhibit indicates that not all paths are currently being utilized under the existing PSP configuration, so changing to Round Robin is required to achieve full path utilization.
Fixed PSP routes all I/O through one designated preferred path and uses alternate paths only as failovers, meaning it does not utilize all active paths concurrently.
Round Robin PSP actively cycles I/O requests across all available active paths in sequence, ensuring that every path is used and providing both load balancing and improved aggregate throughput. This is the only native VMware PSP that distributes I/O across multiple active paths simultaneously, making it the correct choice when the goal is to utilize all available paths.
Concept tested: Round Robin PSP for active-active multipath load balancing
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-DB5A6823-B1D2-48FB-A73F-56440A42FAA3.html
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