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/Review: High Availability and Resilience of Our RDS Database
Review: High Availability and Resilience of Our RDS Database
Learn to analyze a database infrastructure to understand its resilience.
We'll cover the following...
Let’s take a look at the RDS database in its current configuration.
In the diagram above, we can see that we currently have one RDS database instance running in one availability zone. All WordPress instances access the database running on this instance.
High availability of the current RDS deployment
Does this have implications on the high availability of our deployment?
No. Because RDS is managed by AWS, AWS is responsible for it and will make sure that it’s highly available.
Yes, because our RDS database is currently configured as a single-AZ setup running in only one availability zone. If this availability zone goes offline, our deployment will go offline too.
Did you choose “Yes”?
If we analyze RPO and RTO for our RDS database right now, it would not look good. We can check the configuration by following this link: RDS database configuration.
We're creating backups for the last seven days, and we can see that there are indeed snapshots of our database available. The screenshots ...