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When deduplicated files are replicated to another PowerScale cluster through SmartSync, the deduplicated files are rehydrated back to their original size because they no longer share blocks on the target PowerScale cluster. When replication is complete, SmartDedupe can run on the target cluster, providing the same space efficiency benefits as the source cluster.
Shadow stores are not transferred to target clusters. Hence, deduplicated files do not consume less space than nondeduplicated files when they are replicated. To avoid running out of space on target clusters, verify that the total amount of storage space saved, and storage space consumed do not exceed the available space on the target cluster. To reduce the amount of storage space consumed on a target PowerScale cluster, configure deduplication for the target directories of the replication policies. Although this approach deduplicates data on the target directory, it does not allow SmartSync to transfer shadow stores. Deduplication is still performed post-replication through a deduplication job running on the target cluster.