If a SnapMirror relation is in an hourly configuration, which command would re-align the destination after using a two-day-old snapshot?

If a SnapMirror relation is in an hourly configuration, which command would re-align the destination after using a two-day-old snapshot?

• A. SnapMirror update
• B. SnapMirror initialize
• C. SnapMirror quiesce
• D. SnapMirror resync

Answer: (D)

When a SnapMirror relationship drifts because the destination has been backed by an older snapshot, you re-align by performing a resync. In an hourly configuration, SnapMirror maintains a chain of snapshots; if the destination ends up on a two-day-old snapshot, a resync brings the destination up to date by replaying the missing changes from the source across that snapshot chain, using the current source state as the target. This re-aligns the destination efficiently without starting over from scratch. Updating would only apply incremental changes since the last successful transfer and may not correct a substantial divergence from a much older snapshot. Initializing would rebuild the destination from the current source, which is more disruptive than needed when you simply need to catch up. Quiescing just pauses replication, not re-aligning data.

When a SnapMirror relationship drifts because the destination has been backed by an older snapshot, you re-align by performing a resync. In an hourly configuration, SnapMirror maintains a chain of snapshots; if the destination ends up on a two-day-old snapshot, a resync brings the destination up to date by replaying the missing changes from the source across that snapshot chain, using the current source state as the target. This re-aligns the destination efficiently without starting over from scratch.

Updating would only apply incremental changes since the last successful transfer and may not correct a substantial divergence from a much older snapshot. Initializing would rebuild the destination from the current source, which is more disruptive than needed when you simply need to catch up. Quiescing just pauses replication, not re-aligning data.