In VPLEX, what is the purpose of a Consistency Group?

A Consistency Group in VPLEX is designed specifically to maintain data consistency across multiple virtual volumes during operations like snapshots, clones, or data replication. This ensures that related data remains coherent and synchronized, which is critical in scenarios where applications depend on the integrity of the data being accessed from multiple sources. When a Consistency Group is used, it allows for coordinated operations that can lock all involved volumes at a specific point in time, thereby preventing issues that could arise from accessing inconsistent or partially written data.

In contrast to the other answer choices, while improving storage performance, reducing costs, or increasing transfer rates might be relevant to storage technologies, they do not directly describe the primary function of a Consistency Group. The main focus and value of a Consistency Group is indeed the preservation of data integrity and synchronization across volumes, which is essential for maintaining application performance and reliability in environments that rely on accurate data representations during complex operations.