Compare Multi-AZ vs Read Replicas in RDS.

Q: Compare Multi-AZ vs Read Replicas in RDS.

> * **Multi-AZ**: * *Purpose*: High Availability (HA) and disaster recovery. * *Mechanism*: Synchronous replication to a standby instance in a different AZ. * *Traffic*: Active-Passive. You cannot read from or write to the standby instance. * **Read Replicas**: * *Purpose*: Read scaling. * *Mechanism*: Asynchronous replication. * *Traffic*: Active-Active (Read only). Applications route read queries to replicas to offload the primary database.

💬Answer

Multi-AZ:
- Purpose: High Availability (HA) and disaster recovery.
- Mechanism: Synchronous replication to a standby instance in a different AZ.
- Traffic: Active-Passive. You cannot read from or write to the standby instance.
Read Replicas:
- Purpose: Read scaling.
- Mechanism: Asynchronous replication.
- Traffic: Active-Active (Read only). Applications route read queries to replicas to offload the primary database.

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Compare Multi-AZ vs Read Replicas in RDS.

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