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Dell Storage Manager 2020 R1 Administrator's Guide

Deduplication for Synchronous Replication

Deduplication reduces the amount of data required to transfer snapshots to the destination Storage Center by copying only the changed portions of the snapshot history. This is accomplished by comparing the changed data in the snapshot being replicated with the previous data block by block, and transmitting only blocks that differ. While deduplication can be resource-intensive, it is useful when replicating volumes over lower bandwidth WAN links.

NOTE:When you enable replication deduplication, the Storage Center creates a secondary 'Delta' volume. This secondary volume adds to the overall volume memory usage and therefore will reduce the amount of configurable volume space that can be deployed. The additional volume memory usage affects the overall System Scalability Guidelines that are documented in the Storage Center Release Notes.

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