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Multi-AZ is very much applicable with Amazon Aurora. With Aurora compute and storage is decoupled. Storage will always get replicated across 3 AZs, regardless of you compute configuration. When you create read replicas, you can spread them across multiple AZs as well.
Read replicas in Aurora can be used not only for reads, but they also serve HA purpose. Although keep in mind that the readers will lag by several miliseconds (which is acceptable for vast majority of customers). This is a significant improvement over regular RDS multi-AZ HA, which only works as a standby, and doesn't allow reads.
So, to summarize: Multi-AZ HA works on both compute and storage layers with Aurora, and the secondary nodes can serve as HA as well as read replicas.
回答済み 4年前
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