My Oracle Support Banner

ZFS Deduplication (Doc ID 1404665.1)

Last updated on JULY 07, 2023

Applies to:

Solaris Operating System - Version 11.0 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.


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document
 What is deduplication:
 Difference between Compression, Single-Instance Store and Deduplications
 Variable and Fixed Block sizes Deduplication
 Inline or Post-Process Deduplication:
 Deduplication Advantages
 Dedup Ratio
 ZFS Dedup Features
 ZFS Dedup Usage Examples
 ZFS dedup Sizing
 ZFS Dedup Performance

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.