title: AWS RDS Read Replica act as Failover Standby
body: <p>I am currently assessing whether to use RDS MySQL Multi-AZ or Single AZ with Read Replica.</p>
  <p>Considerations are budget and performance, as Multi-AZ cost twice as much as Single AZ and have no ability to offload read operations, Single AZ with Read Replica seems to be a logical choice.</p>
  <p>However, I saw a way to manually 'promote' the Read Replica to master in the event of master's failure, but is there a way to <strong>automate</strong> this?</p>
  <p><em>Note: There was a similar question but it did not address my question:
  <a href="https://stackoverflow.com/questions/24156705/read-replicas-in-rds-aws">Read replicas in RDS AWS</a></em></p>