-- **Zone-redundant**. Zone redundant high availability deploys a standby replica in a different zone with automatic failover capability. Zone redundancy provides the highest level of availability, but requires you to configure application redundancy across zones. For that reason, choose zone redundancy when you want protection from availability zone level failures and when latency across the availability zones is acceptable. While there is some latency impact on writes and commits due to synchronous replication, it doesn't affect read queries. This impact is very specific to your workloads, the SKU type you select, and the region.
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