[Bug 159251] [zfs] [request]: add FLETCHER4 as DEDUP hash option

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=159251

Xin LI <delphij at FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|In Discussion               |Issue Resolved
                 CC|                            |delphij at FreeBSD.org
         Resolution|---                         |Feature Proposal Rejected

--- Comment #4 from Xin LI <delphij at FreeBSD.org> ---
This feature is intentionally removed in OpenSolaris build 128 because
fletcher4 is not endianness safe and caused problems for cross-endianness.  On
the other hand the collision rate is fairly high, making it not suitable as a
dedup checksum.

We may add some other faster checksum algorithms in the future but it's
unlikely that fletcher4 will ever be added back as a dedup checksum.

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