Which practice ensures timing accuracy for operations like snapshots and replication across NetApp systems?

• A. Use NTP to synchronize clocks across systems.
• B. Rely on the system's local clock without synchronization.
• C. Disable time synchronization to prevent drift.
• D. Use DNS to time-stamp events.

Answer: (A)

Keeping clocks in sync across NetApp systems is essential for accurate timing of operations like snapshots and replication. When the clocks on different systems drift, the timestamps on data and events diverge, which can lead to ordering issues, inconsistent snapshot trees, and replication mismatches. A single, reliable time reference lets every node stamp events with a common timeline, ensuring that snapshots, replication, and recovery processes remain coordinated and trustworthy.

Using NTP to synchronize clocks across systems provides that shared time base and continuously corrects drift, which is why it is the best practice. In contrast, relying on a system’s local clock without synchronization allows drift to accumulate, separating timestamps across devices. Disabling time synchronization only makes drift worse and breaks coordination. DNS, while important for resolving names, does not provide time information or timestamp events, so it cannot align clocks across systems.