Reader Vs Writer Instance Flashcards
What are the two types of instances within an Amazon Aurora cluster?
Writer and Readers
Instances within Amazon Aurora cluster are Writers and Readers.
What is the role of a Writer Instance?
Handles writes; can also read
The role of a Writer Instance is to handle writes and can also read.
How many Writer Instances are allowed per cluster?
One per cluster
Only one Writer Instance is allowed per cluster.
What type of scalability does a Writer Instance have?
Vertical only (upgrade instance)
A Writer Instance has vertical scalability only, meaning it can be upgraded in size.
What is the availability of a Writer Instance?
Critical; failure triggers failover
The availability of a Writer Instance is critical, and failure triggers failover.
What are the use cases for a Writer Instance?
Transactional changes
A Writer Instance is used for transactional changes.
What is the cost based on for a Writer Instance?
Instance size and IOPS
The cost of a Writer Instance is based on its size and IOPS.
What is the role of a Reader Instance?
Handles reads
The role of a Reader Instance is to handle reads.
How many Reader Instances are allowed per cluster for scalability?
Up to 15 per cluster
Up to 15 Reader Instances are allowed per cluster for scalability.
What type of scalability does a Reader Instance have?
Horizontal (add more instances)
A Reader Instance has horizontal scalability, meaning more instances can be added.
What is the availability of a Reader Instance?
Distributes reads; can be a failover target
A Reader Instance’s availability is to distribute reads and can be a failover target.
What are the use cases for a Reader Instance?
Read-heavy workloads, analytics
A Reader Instance is used for read-heavy workloads and analytics.
What is the cost increase based on for a Reader Instance?
Each instance added
The cost of a Reader Instance increases with each instance added.
