Darren J Moffat wrote:
Orvar Korvar wrote:
  
I was under the impression that you can create a new zfs dataset and turn on the dedup functionality, and copy your data to it. Or am I wrong?
    

you don't even have to create a new dataset just do:

# zfs set dedup=on <dataset>
  
But like all ZFS functions will that not only get applied, when you (re)write (old)new data, like compression=on ?

Which leads to the question would a scrub activate dedupe?




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