Practice Quiz

VMware VCP4

Category - ESX(i) Storage

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Guy, a VMware administrator, has attached a LUN to his ESX host and split this LUN into 8 separate VMFS volumes. He has added 20 virtual machines to each VMFS volume, but he is receiving complaints that the virtual machines are not performing as expected. What is the reason for this?
  1. Best practice dictates that a single VMFS volume should reside on a single LUN.
  2. Best practice dictates that no more than 12 virtual machines should reside on a single VMS volume.
  3. Guy has not set the advanced option to allow 20 virtual machines to reside on a single VMFS datastore.
Explanation
Answer: A - The virtual machines are not performing as expected due to the fact that best practice dictates that a single VMFS volume should reside on a single LUN. This is to avoid LUN-level locking, which occurs whenever a write operation occurs to a LUN. Note that in this scenario, the full LUN will be locked for every file system operation and not just the singular VMFS volumes that are calling for the write operation.
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