Solaris Express Community Edition, build 129: In this Solaris release, you can use the deduplication property to remove redundant data from your ZFS file systems. If a file system has the dedup property enabled, duplicate data blocks are removed synchronously. The result is that only unique data is stored and common components are shared between files.
You can enable this property as follows:
# zfs set dedup=on tank/home
Although deduplication is set as a file system property, the scope is pool-wide. For example, you can identify the deduplication ratio as follows:
# zpool list tank NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT tank 136G 55.2G 80.8G 40% 2.30x ONLINE -
The zpool list output has been updated to support the deduplication property. For more information, see
For more information setting the deduplication property, see The dedup Property.
For detailed information about the ZFS deduplication features, see this blog:
For up-to-date information about the ZFS deduplication features, see this FAQ: