> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Nico Williams
> IMO dedup should always verify.

IMO, it should be a decision left to the user or admin, with the default being 
verify.  (Exactly as it is now.)  Because there is a performance-to-reliability 
tradeoff, and there is a very solid argument that the probability of collision 
causing data loss is so small that you should instead be more concerned with 
metoer strike and other improbable failures causing data loss.  For some people 
and some situations, that argument will be good enough - they would opt for the 
performance increase.  And for others, that argument is not good enough - they 
would opt for verification.

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