mysql - 跨区域的 AWS RDS 多可用区？

Question

RDS MySQL Multi-AZ 数据库实例是否可以跨两个区域？

Answer 1

可以，但是其他区域的节点是read replicas .

You can create one or more replicas of a given source [MySQL] DB Instance within an AWS Region or across AWS Regions and serve high-volume application read traffic from multiple copies of your data [...]

Multi-AZ Deployments and Read Replicas use different underlying replication technologies suited to their respective purposes. However, you can use them together for reliable, scalable production deployments.

如您所想，只读副本具有局限性。您无法写入副本(很明显)，并且存在复制滞后，如果源数据库出现故障(这是多可用区可以帮助您的地方)，这可能会导致数据丢失。 RDS FAQ有一些讨论。