On 07/31/2012 09:46 AM, opensolarisisdeadlongliveopensolaris wrote:
> Dedup: First of all, I don't recommend using dedup under any
> circumstance. Not that it's unstable or anything, just that the
> performance is so horrible, it's never worth while. But particularly
> with encrypted data, you're guaranteed to have no duplicate data
> anyway, so it would be a pure waste. Don't do it.
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One thing you can do is enable dedup when you copy all your data from
one zpool to another, then, when you're done, disable dedup. It will no
longer waste a ton of memory, and your new volume will have a high dedup
ratio. (Obviously anything you add after you turn dedup off won't be
deduped.) You can keep the old pool as a backup, or wipe it or whatever
and later on do the same operation in the other direction.
Anyone know if zfs send | zfs get will maintain the deduped files after
this? Maybe once deduped you can wipe the old pool, then use get|send
to get a deduped backup?
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