[Bug 159251] [zfs] [request]: add FLETCHER4 as DEDUP hash option
bugzilla-noreply at freebsd.org
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Fri Oct 10 08:27:16 UTC 2014
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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