enable deduplication?

[rs232]

I've imported and upgraded a pool.

How do I now enable deduplication on an existing pool?

Thanks!

[rs232]

I had to use the shell...

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nas4free:~# zfs get dedup mypool
NAME   PROPERTY  VALUE          SOURCE
mypool  dedup     off            default

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nas4free:~# zfs set dedup=on mypool

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nas4free:~# zfs get dedup mypool
NAME   PROPERTY  VALUE          SOURCE
mypool  dedup     on             local

[rs232]

Is there anything else I can enable now that I'm on version zfs28?

slim ZIL?

Anything else?

[kernow]

I have no idea what any of these new features do

edit: ah I see now, seems like dedup requires a ton of RAM, it's not like I'm running out of space so I'll just leave it off.

Knowing about the other features would be great though

[rs232]

Now that I've enabled deduplication is it applied to existing or only nee files?

[bryan]

Now that I've enabled deduplication is it applied to existing or only nee files?

Dedupe, like compression, is only applied to newly written data.