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VMware Interview Question No 6

 

Administrator has to configure link failure detection mechanism as part of teaming policy to detect uplink (pNIC0 and pNIC1) failures.
Considering this topology, which link detection mechanism would you recommend vSphere admin to configure in below mentioned failure scenarios:

1. Link Failure between Access and Distributed switch
2. Link Failure between Distributed Switch and Core Switch.

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What is SCSI RESERVATION & How it Works

 

When single resource is being shared across multiple objects/Users then we need some control mechanism for helping us to avoid any kind of confliction/unnecessary congestion while claiming that resource. That’s what exactly being solved by Reservation.
Reservation restrict other users to claim resource which is already being allocated or used by another user.

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What Is ALUA (Asymmetric Logic Unit Access) & How ALUA is different from A/A and A/P Array?

 

ALUA is type of storage device that is capable of servicing IO to given LUN on two different Storage Processors but in an uneven manner. ALUA is also known as Asymmetric Active/Active Arrays. Active/Active -> Both the Controller ports receives IO Commands to LUN. Asymmetric -> Only one controller which is owning the LUN can issues IO to that LUN.

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