On 24/04/2024 22:33, Gary R. Schmidt wrote:
On 24/04/2024 21:30, Roberto Greiner wrote:

Em 24/04/2024 04:30, Radosław Korzeniewski escreveu:
Hello,

wt., 23 kwi 2024 o 13:33 Roberto Greiner <mrgrei...@gmail.com> napisał(a):


    Em 23/04/2024 04:34, Radosław Korzeniewski escreveu:
    Hello,

    śr., 17 kwi 2024 o 14:01 Roberto Greiner <mrgrei...@gmail.com>
    napisał(a):


        The error is at the end of the page, where it says that you
        can see how
        much space is being used using 'df -h', but the problem is
        that df can't
        actually see the space gain from dedup, it shows how much
        would be used
        without dedup.


    This command (df -h) shows how much allocated and free space is
    available on the filesystem. So when you have a dedup ratio 20:1,
    and you wrote 20TB, then your df command shows 1TB allocated.

    But that is the exact problem I had. df did NOT show 1TB
    allocated. It indicated 20TB allocated (yes, in ZFS).

I have not used ZFS Dedup for a long time (I'm a ZFS user from the first beta in Solaris), so I'm curious - if your zpool is 2TB in size and you have a 20:1 dedup ratio with 20TB saved and 1TB allocated then what df shows for you?
Something like this?
Size: 2TB
Used: 20TB
Avail: 1TB
Use%: 2000%

No, the values are quite different. I wrote 20tb to stay with the example previously given. My actual numbers are:

df: 2,9TB used
zpool list: 862GB used, 3.4x dedup level.
Actual partition size: 7.2TB

You use zpool list to examine filespace.
Or zfs list.


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