MetroCluster primarily provides what capability?

• A. Caching hot data at a client node.
• B. Synchronous remote disaster-recovery across two sites for near-zero data loss and high availability.
• C. Snapshot-based backups to local media.
• D. Cross-cluster data analytics.

Answer: (B)

MetroCluster is a two-site disaster-recovery solution that provides synchronous remote replication between sites. The key idea is that writes are committed only after they’re durably written at both locations, which delivers near-zero data loss in the event of a site failure. This setup also offers high availability because services can fail over to the surviving site with minimal disruption, keeping data and access available. It’s not about caching data at a client node, snapshot backups to local media, or analytics across clusters; those are separate capabilities, whereas MetroCluster focuses on continuous, synchronized replication for DR and HA across geographically separated sites.