CompTIA Cloud+ (CV0-004)Cloud ArchitectureHard
A cloud administrator is designing a highly available architecture for a database. The requirement is to minimize data loss in the event of a regional outage. Which storage replication strategy would best meet this objective?
- ASynchronous replication to another region
- BAsynchronous replication to another region
- CSynchronous replication to a single Availability Zone
- DAsynchronous replication to a single Availability Zone
Show answer & explanationAnswer & explanation
Correct answer: B. Asynchronous replication to another region
To minimize data loss during a regional outage, replication to another region is necessary. Asynchronous replication is typically used for cross-region replication due to latency, providing a Recovery Point Objective (RPO) greater than zero but protecting against regional failures.
Why the other options are wrong
- A. Synchronous replication across regions is generally impractical due to high latency, making it unsuitable for most applications and often causing performance issues.
- C. Synchronous replication to a single AZ does not protect against a regional outage and is not suitable for cross-region due to latency.
- D. Replicating to a single AZ does not protect against a regional outage.
Asynchronous Cross-Region Replication
A data replication method where data is copied to a remote region after being committed locally, offering disaster recovery with a Recovery Point Objective (RPO) greater than zero.
- Protects against regional outages and disasters.
- Tolerates higher latency between regions.
- Involves potential for some data loss (RPO > 0).
Memory trick: To survive a 'Regional' disaster, you need 'Asynchronous' 'Replication' far away.