SG0-001 · Question #2
When setting up replication for application spanning multiple LUNs, which of the following replication features should be utilized?
The correct answer is D. Consistency Group. When replicating an application that spans multiple LUNs, a consistency group should be utilized to ensure all associated LUNs are replicated simultaneously and maintain data integrity.
Question
When setting up replication for application spanning multiple LUNs, which of the following replication features should be utilized?
Options
- AClone
- BSnapshot
- CSemi-synchronous Replication
- DConsistency Group
How the community answered
(66 responses)- A5% (3)
- B9% (6)
- C2% (1)
- D85% (56)
Why each option
When replicating an application that spans multiple LUNs, a consistency group should be utilized to ensure all associated LUNs are replicated simultaneously and maintain data integrity.
A clone creates a full, independent copy of a LUN at a specific point in time but does not inherently coordinate multiple LUNs for ongoing replication consistency.
A snapshot creates a point-in-time copy of a single LUN, but it does not guarantee consistency across multiple dependent LUNs for an application.
Semi-synchronous replication describes a data transfer and acknowledgment mode for replication but does not address the coordination of multiple LUNs for application consistency.
A consistency group ensures that all I/O operations across multiple LUNs belonging to a single application are captured and replicated at the exact same point in time. This is crucial for applications (like databases) spanning multiple LUNs to maintain transactional integrity and prevent data corruption during recovery by ensuring all related data is consistent.
Concept tested: Storage replication - consistency groups for multiple LUNs
Source: https://docs.microsoft.com/en-us/azure/site-recovery/vmware-azure-consistency-groups
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