D-PST-DS-00: Dell PowerStore DesignDemo

By Dell · Question Mode

QuestionQ15

Solution Design

A customer needs to replicate several volumes to safeguard an application. Any latency exceeding 15 ms will make the application crash. The circuit-mile distance between the two sites is 1,000 miles.

Which replication method should the Storage Architect recommend?

  • A Metro
  • B Asynchronous
  • C Synchronous
Explanation

Asynchronous replication acknowledges writes locally and transfers changes to the remote site without placing the intersite round-trip latency in the application write path. At 1,000 circuit miles, synchronous and Metro replication would add remote-write latency beyond the application’s 15 ms tolerance; Metro is a synchronous, low-latency configuration.

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