Table of Contents
Question
A company has a Dell Unity XT 880 at its Boston site providing file storage for a business production application. The company has a second remote site 8 km (5 mi) away in Cambridge. A third site is in New York (342 km (213 mi) from the Boston site). How can the same production data be protected against system outage with a zero RPO and a maximum of 15 minutes RPO data recovery?
A. Synchronous replicate from Boston to Cambridge. Asynchronous replicate from Boston to New York
B. Synchronous replicate from Boston to Cambridge. Synchronous replicate from Boston to New York
C. Asynchronous replicate from Boston to Cambridge. Asynchronous replicate from Cambridge to New York
D. Synchronous replicate from Boston to Cambridge. Synchronous replicate from Cambridge to New York
Answer
D. Synchronous replicate from Boston to Cambridge. Synchronous replicate from Cambridge to New York
Explanation
The best solution is:
D. Synchronous replicate from Boston to Cambridge. Synchronous replicate from Cambridge to New York.
Here’s why:
Synchronous replication means that the data is replicated in real-time, with the same data changes happening simultaneously on both sites. This ensures that the data is up-to-date and consistent across all sites, with zero RPO.
To achieve a maximum RPO of 15 minutes, a synchronous replication setup between Boston and Cambridge is necessary, as it ensures that any changes made to the data in Boston are immediately replicated to Cambridge.
Additionally, a synchronous replication setup between Cambridge and New York is also necessary to ensure that any changes made to the data in Cambridge are immediately replicated to New York, which is 342 km (213 mi) away.
Asynchronous replication, where the data is replicated periodically, and not in real-time, is not suitable for this scenario as it would result in a higher RPO.
Therefore, the best solution is to set up synchronous replication between Boston and Cambridge, and between Cambridge and New York, to ensure that the production data is protected against system outages with a zero RPO and a maximum of 15 minutes RPO data recovery.
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