Which of the following descriptions about the time synchronization mechanism in the cluster is wrong?

Question

Options

• AKeeping the virtual machine time synchronized can avoid abnormal operation
• BDuring the backup process, the time between the hosts can not be synchronized
• CYou can set the clock source outside the host to control the time of the virtual machine
• DWhen setting the virtual machine time synchronization host, the time will be affected by the host

• A
  4% (2)
• B
  77% (43)
• C
  5% (3)
• D
  14% (8)

Explanation

Option B is the wrong statement because time synchronization between hosts is not prohibited or impossible during backup processes - hosts can and do synchronize their clocks during backups, and there is no technical restriction that prevents this. The claim that time "cannot be synchronized" during backup is factually incorrect and overly absolute.

Why the other options are correct (and therefore not the answer):

• A is true - keeping VM clocks in sync prevents issues like failed transactions, log inconsistencies, and authentication errors that rely on timestamps.
• C is true - an external NTP (Network Time Protocol) server can serve as the clock source for the host, which in turn controls VM time.
• D is true - when a VM is configured to synchronize with its host, the host's clock directly influences the VM's time, a standard hypervisor behavior (e.g., VMware Tools time sync).

Memory tip: Look for the word "cannot" or "cannot be" in cluster time-sync questions - absolute negative statements like "X cannot happen" are often the trap. In reality, time sync is designed to be resilient and continuous, not blocked by operational states like backup.

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