On Wed, Dec 16, 2009 at 8:09 PM, Cyril Plisko <cyril.pli...@mountall.com> wrote:
>>> I've set dedup to what I believe are the least resource-intensive
>>> settings - "checksum=fletcher4" on the pool, & "dedup=on" rather than
>>
>> I believe checksum=fletcher4 is acceptable in dedup=verify mode only.
>> What you're doing is seemingly deduplication with weak checksum w/o
>> verification.
>
> I think fletcher4 use for the deduplication purposes was disabled [1]
> at all, right before build 129 cut.
>
>
> [1] 
> http://hg.genunix.org/onnv-gate.hg/diff/93c7076216f6/usr/src/common/zfs/zfs_prop.c

Peculiar fix, quotes the reason being "checksum errors because we are
not computing the byteswapped checksum", but solves it by dropping
checksum support instead of adding byte-swapped checksum computation.
A I missing something?

Regards,
Andrey


>
>
> --
> Regards,
>        Cyril
>
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