Discover the implications of snapshot configuration choices on the behavior of the “Revert to Latest Snapshot” option in VMware vSphere 8.x. This comprehensive guide, tailored for the 2V0-21.23 certification exam, explores the nuances of memory snapshot and guest file system quiesce settings, providing insights for virtual machine restoration scenarios.
Table of Contents
Question
An administrator has a requirement to revert a running virtual machine to a previous snapshot af-ter a failed attempt to upgrade an application. When the administrator originally took the snap-shot, the following choices in the Take Snapshot dialog were made:
- Snapshot the virtual machine’s memory = false
- Quiesce guest file system = false
What will be the result of the administrator selecting the “Revert to Latest Snapshot” option to return the virtual machine to a previous snapshot? (Choose two.)
A. The virtual machine will be restored to the parent snapshot
B. The virtual machine will be restored in a powered off state.
C. The virtual machine will be restored to the child snapshot
D. The virtual machine will be restored in a powered on state.
E. The virtual machine will be restored in a suspended state.
Answer
A. The virtual machine will be restored to the parent snapshot
D. The virtual machine will be restored in a powered on state.
Explanation
According to the scenario, the administrator selected the following options when taking the snapshot:
- Snapshot the virtual machine’s memory = false
- Quiesce guest file system = false
With these settings, if the administrator selects the “Revert to Latest Snapshot” option, the result will be:
A. The virtual machine will be restored to the parent snapshot.
D. The virtual machine will be restored in a powered on state.
- When the “Snapshot the virtual machine’s memory” option is set to false, VMware does not capture the memory state of the running virtual machine. Instead, it only captures the state of the virtual disk and other configuration files.
- With the “Quiesce guest file system” option set to false, VMware does not attempt to quiesce (pause) the file system activity within the guest operating system before taking the snapshot. This can potentially lead to inconsistent file system state if the virtual machine was actively writing data during the snapshot process.
- When reverting to a snapshot taken with these settings, VMware restores the virtual disk and configuration files to the state they were in when the snapshot was created. However, since the memory state was not captured, the virtual machine will be powered on after the revert operation, using the current memory contents.
- The restored virtual machine will be in the same power state as it was when the snapshot was taken. Since the snapshot did not capture the memory state, the virtual machine will be powered on after the revert, regardless of its previous power state.
It’s important to note that reverting to a snapshot without capturing the memory state can potentially lead to inconsistencies or data corruption if the guest operating system or applications were in an inconsistent state when the snapshot was taken. Therefore, it’s generally recommended to quiesce the guest file system and capture the memory state when taking snapshots, especially for critical or production virtual machines.
VMware vSphere 8.x Professional 2V0-21.23 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the VMware vSphere 8.x Professional 2V0-21.23 exam and earn VMware vSphere 8.x Professional 2V0-21.23 certification.