advice on moving data from 1 dataset to another

[nikkon]

Hello,
I need an advice on something:
a long time ago, when I created the Raidz, I had only one dataset create and everything in that. Now I intend to separate data, and move everything (media, photos, stuff) to its own dataset.
can I move data with the mv command with by default is recursive? or should I do it in a different fashion? I tried with mv, but is damn slow. 8GB took me 10 minutes.

 

[Nick2253]

What you're running into the is main limitation of the fabulous copy-on-write feature of ZFS. In order to move data between datasets, data must be copied from one dataset to the other, which means a simultaneous read and write in your pool. Unlike data moves intra-dataset, which are just simple pointer changes.

It may be faster to copy the data off of the pool, and then copy it back onto the pool (for example, with a second pool, or through an external drive).

 

[nikkon]

thanks for the reply. i will probably copy-paste it one by one and see how iostat looks like. hope to be faster

 

[nikkon]

i decided to do it with rsync. seems a bit faster than cp.