What is the difference between SnapMirror and SyncMirror?

• A. SnapMirror replicates asynchronously; SyncMirror provides synchronous replication for zero RPO in the same or connected network.
• B. SnapMirror is synchronous; SyncMirror asynchronous.
• C. They are identical and have no differences.
• D. SyncMirror stores backups on a remote target for long-term retention.

Answer: (A)

The main distinction is the replication timing and the required network conditions. SnapMirror uses asynchronous replication, sending changes to the destination after they’re produced, which means there is some RPO (data loss possible) if the source fails before the latest updates are committed at the destination. SyncMirror, on the other hand, provides synchronous replication, where a write is considered complete only after the destination has acknowledged it, yielding zero RPO as long as the network latency is within acceptable limits. This synchronous mode is intended for close, high-speed connections within the same site or a tightly connected network, not for typical long-distance backups. So the statement that SnapMirror is asynchronous and SyncMirror is synchronous correctly captures how these two replication options differ.