Table of Contents
Question
Which describes cascade replication on a Dell Unity XT?
A. Synchronous replication of a file resource from Sites A to B, then B to C, then C to D
B. Asynchronous replication of a block resource from Sites A to B, then B to C, then C to D
C. Synchronous replication of a block resource from Sites A to B, then B to C, then C to D
D. Asynchronous replication of a file resource from Sites A to B, then B to C, then C to D
Answer
C. Synchronous replication of a block resource from Sites A to B, then B to C, then C to D
Explanation
C. Synchronous replication of a block resource from Sites A to B, then B to C, then C to D
Cascade replication on a Dell Unity XT involves synchronously replicating block storage resources from one site to the next in a cascading fashion. This ensures data consistency across all sites. Option C describes this process accurately.
Cascade replication is a feature of Dell Unity XT storage arrays that allows for synchronous replication of block resources. Synchronous replication means that data is replicated in real-time, ensuring that the data on the target site is always up to date with the source site.
In the case of cascade replication, the replication occurs from one site to the next in a cascading manner. This means that the data is first replicated from Site A to Site B, then from Site B to Site C, and finally from Site C to Site D. This sequential replication ensures that the data is consistently replicated across all sites in the cascade.
The use of block resources in cascade replication means that the replication is at the block level, rather than the file level. Block-level replication is more efficient and allows for better utilization of storage resources.
Options A, B, and D are incorrect because they either describe file replication instead of block replication or asynchronous replication instead of synchronous replication.
In summary, cascade replication on a Dell Unity XT involves synchronous replication of block resources from one site to the next in a cascading fashion, ensuring data consistency across all sites.
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