AWS 声称 RDS 同步复制到备用实例可防止数据丢失

AWS claims that RDS sync replication to standby instance protects against data loss

任何人都知道 AWS 使用什么来进行 RDS 数据库实例同步。复制? DRBD 或任何其他低级设备块传输或其他? 原因是 master/primary 数据库实例发生故障时,备用数据库实例会出现故障?

注意:在 RDS 部分 "AWS Cloud Practitioner Essentials (Second Edition): AWS Integrated Services" 数字培训视频

中声明

AWS 根据需要利用数据库物理和逻辑数据库复制。

As per the official documentation

Multi-AZ deployments for the MySQL, MariaDB, Oracle, and PostgreSQL engines utilize synchronous physical replication to keep data on the standby up-to-date with the primary. Multi-AZ deployments for the SQL Server engine use synchronous logical replication to achieve the same result, employing SQL Server-native Mirroring technology. Both approaches safeguard your data in the event of a DB Instance failure or loss of an Availability Zone.

官方幻灯片显示RDS实际上是利用DRBD进行物理复制。

https://www.slideshare.net/AmazonWebServices/amazon-rds-with-amazon-aurora-aws-public-sector-summit-2016