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Hello,
The following link include information for your use case
Amazon RDS Multi-AZ with two readable standbys: Automatically failover in typically under 35 seconds with zero data loss and with no manual intervention.
https://aws.amazon.com/rds/features/multi-az/#Amazon_RDS_Multi-AZ_with_two_readable_standbys
已回答 2 年前
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There is no way to change instance class of Aurora instances. It may take up to 15 mins. From this link : "Scaling isn't instantaneous. It can take 15 minutes or more to complete the change to a different DB instance class. We recommend that if use this approach to modify the DB instance class, you apply the change during the next scheduled maintenance window (rather than immediately) to avoid affecting users. "
已回答 2 年前