SG0-001 · Question #11
Which of the following is recommended for mirroring data over long distances when the transaction rate is high and impact to the performance on the main site must be minimized?
The correct answer is D. Asynchronous. The question seeks the recommended data mirroring type for high transaction rates over long distances, prioritizing minimal performance impact on the primary site.
Question
Which of the following is recommended for mirroring data over long distances when the transaction rate is high and impact to the performance on the main site must be minimized?
Options
- AReplication Consistent
- BSynchronous
- CSymmetric
- DAsynchronous
How the community answered
(30 responses)- A7% (2)
- B13% (4)
- C10% (3)
- D70% (21)
Why each option
The question seeks the recommended data mirroring type for high transaction rates over long distances, prioritizing minimal performance impact on the primary site.
'Replication Consistent' refers to maintaining data integrity across multiple volumes at the replica site, but it is not a replication type addressing distance and performance in this manner.
Synchronous replication requires an acknowledgment from the secondary site before the primary application can proceed, making it highly susceptible to latency over long distances and thus significantly impacting primary site performance.
'Symmetric' is not a standard term for a data replication type in this context; it might refer to controller architectures but not a method of data mirroring.
Asynchronous replication is recommended for mirroring data over long distances with high transaction rates when minimizing primary site performance impact is critical. Data is written to the primary storage, an acknowledgment is immediately sent to the application, and then the data is replicated to the secondary site without waiting for confirmation from the secondary. This decouples primary site I/O operations from network latency to the secondary site.
Concept tested: Asynchronous vs. Synchronous replication for DR
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-replica/storage-replica-overview#asynchronous-and-synchronous-replication
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