Exam 2V0-21.20 topic 1 question 3 discussion

The answer is B. Recommend to read the full KB. The word "commit" is used and it does mention considerable delay times when dealing with high IO VMs. https://kb.vmware.com/s/article/1002836

I believe the answer is B. Forget whether the word used is "merge" or "commit", they ultimately mean the same thing. The key difference is B indicates long stun times, which aligns with merging a 1TB Snapshot, whereas C says there will be a brief stun, which definitely will not be the case with a 1TB snapshot. Therefore the answer should be B

Answer is C, merge

Option B is correct. Bu experience big snapshot cloud be a headache

Answer is B https://kb.vmware.com/s/article/1002836

Deleting a large snapshot takes long time and has impact in the VM.

For busy virtual machines, the volume of activity may consume system resources for longer than a usual amount of time, resulting in a larger Consolidate Helper snapshot delta. https://kb.vmware.com/s/article/1002836

For my experience committing large snapshot delta files is a non zero impact activity, if the VM is also still heavy working, the impact will be quite noticeable

Option B states that the ESXi will commit the snapshot delta disk into the base disk, but this is not the correct term used by VMware. The correct term is "merge," which is described in option C. Additionally, option B states that ongoing database write activity could result in long stun times, which is not entirely accurate since stun times are determined by the size of the snapshot and the level of disk activity on the virtual machine, not just ongoing database write activity

I believe c is the answer

Answer is B

C is the Answer

The keywords here are not "commit" or "merge" but "briefly stunned" and "result in long stun times" and the experience tells me that if you try to delete a big snapshot that also is growing every second then the VM is highly impacted by a long time.

The comments here supporting answer C, try to highlight a difference between "commit" and "merge" but VMware's documentation seems to use the 2 terms interchangeably. Looking at the VMware vSphere Install, Configure, Manage V7 Lecture Manual, page 335, it mentions changes are "merged" with the base VMDK. Then the next page, it mentions snap data is "committed" to the parent (base disk). For every page until 339, it continuously mentioned "committing" delta disks to the base disks. I found other documentation link on VMware's site also mentioning committing to base disk. As those who support answer B point out, the high writes as described in the question will result in a long stun time. Considering that "commit" and "merge" mean the same thing, and unless you have super fast storage, you will end up with a long stun time, answer B seems like the correct answer.

B, According to the VMware vSphere: Install, Configure, Manage [V7] STUDENT Lecture Manual. The key word here is "commit". I can not share a link to the material.

C is correct, Merge https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.hostclient.doc/GUID-06CB6D7D-9ECE-4C53-AA11-C5F2662328CD.html

B: https://kb.vmware.com/s/article/1002836