[AWS - DA] RDS

• Running DB instnace as a mulit-az deployment can further reduce the implace of a mainatenance event becasue Amazon RDS applies operating system updates by following these steps
  • Perform maintenance on the standby.
  • Promote the standy to primary
  • Perform maitenance on the old primary, which becomes the new standby.

[AWS - DA] RDS

原文：https://www.cnblogs.com/Answer1215/p/14885405.html