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2009 Dec 15
7
ZFS Dedupe reporting incorrect savings
...enabled dedupe on it.
zpool create -O recordsize=64k TestPool device1
zfs set dedup=on TestPool
I copied files onto this pool over nfs from a windows client.
Here is the output of zpool list
Prompt:~# zpool list
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
TestPool 696G 19.1G 677G 2% 1.13x ONLINE -
When I ran a "dir /s" command on the share from a windows client cmd, I see the file size as 51,193,782,290 bytes. The alloc size reported by zpool along with the DEDUP of 1.13x does not addup to 51,193,782,290 bytes.
According to the DEDUP (Dedupe...