ZFS Deduplication

(Doc ID 1404665.1)

Last updated on JULY 29, 2016

Applies to:

Solaris Operating System - Version 11 11/11 and later
Information in this document applies to any platform.


ZFS deduplication (dedup) property allows automatic detection and removal of redundant blocks in the file on disk. Dedup of data block in ZFS happens synchronously while writing a transaction group. This results in substantial disk space saving if file data contains high counts of redundant blocks and improved performance by eliminating physical IO required for writing redundant blocks.


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