SOLVED Moving files under ix-applications to subdirectories is slow

[qq8554650]

translate from google

TrueNAS-SCALE-22.02.0.1
/mnt/data/ix-applications/tmp_write
I have files such as MYD MYI uploaded beforehand

Then I installed mysql with docker, ready to move the above files to
/mnt/data/ix-applications/docker/volumes/mysql57/_data
it feels like a copy

A single 10G file generated with rand took 33 seconds.
Why is it like copying from one disk to another
Instead of moving to a different directory under the current disk?

mysql uses mapping, will it be related to this?
-v mysql57:/var/lib/mysql \

 

[anodos]

If they are separate datasets, then it is a copy and not a rename.

 

[qq8554650]

If they are separate datasets, then it is a copy and not a rename.

Just a subfolder of it, with updated Storage pictures

 

[anodos]

Just a subfolder of it, with updated Storage pictures

Look at output of `zfs list` if there are separate lines for
`/mnt/data/ix-applications/docker`
and
`/mnt/data/ix-applications`

they are separate datasets.