SG0-001 · Question #398
When the latency between the sites is high, which of the following replication types should be used?
The correct answer is D. Asynchronous. When high latency exists between sites, asynchronous replication should be used to avoid impacting the performance of the primary site.
Question
When the latency between the sites is high, which of the following replication types should be used?
Options
- ASymmetric
- BSynchronous
- CAsymmetric
- DAsynchronous
How the community answered
(36 responses)- B6% (2)
- C3% (1)
- D92% (33)
Why each option
When high latency exists between sites, asynchronous replication should be used to avoid impacting the performance of the primary site.
Symmetric and asymmetric are not standard classifications for storage replication types in this context.
Synchronous replication requires data to be be committed to both the primary and secondary sites before acknowledging the write, which introduces significant performance degradation in high-latency environments.
Symmetric and asymmetric are not standard classifications for storage replication types in this context.
Asynchronous replication writes data to the primary site and acknowledges the write without waiting for the data to be committed to the secondary site. This decouples the primary site's write operations from the network latency to the secondary site, making it suitable for high-latency or geographically dispersed environments.
Concept tested: Asynchronous vs. synchronous replication suitability
Source: https://learn.microsoft.com/en-us/azure/site-recovery/azure-to-azure-architecture#replication-process
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