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Subject: Re: svn commit: r301010 - in head/sys:
 cddl/contrib/opensolaris/common/zfs cddl/contrib/opensolaris/uts/common
 cddl/contrib/opensolaris/uts/common/fs/zfs
 cddl/contrib/opensolaris/uts/common/fs/zfs/sys ...
To: Ivan Klymenko <fidaj@ukr.net>
References: <201605310412.u4V4CEh4021513@repo.freebsd.org>
 <20160531144155.7e96c5a5@nonamehost.local>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
From: Allan Jude <allanjude@freebsd.org>
Message-ID: <10b10f89-0212-2a9d-06ed-6477ef658962@freebsd.org>
Date: Tue, 31 May 2016 10:44:54 -0400
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On 2016-05-31 07:41, Ivan Klymenko wrote:
> On Tue, 31 May 2016 04:12:14 +0000 (UTC)
> Allan Jude <allanjude@FreeBSD.org> wrote:
> 
>> Author: allanjude
>> Date: Tue May 31 04:12:14 2016
>> New Revision: 301010
>> URL: https://svnweb.freebsd.org/changeset/base/301010
>>
>> Log:
>>   Connect the SHA-512t256 and Skein hashing algorithms to ZFS
>>   
>>   Support for the new hashing algorithms in ZFS was introduced in
>> r289422 However it was disconnected because FreeBSD lacked
>> implementations of SHA-512 (truncated to 256 bits), and Skein.
>>   
>>   These implementations were introduced in r300921 and r300966
>> respectively 
>>   This commit connects them to ZFS and enabled these new checksum
>> algorithms 
>>   This new algorithms are not supported by the boot blocks, so do not
>> use them on your root dataset if you boot from ZFS.
>>   
> 
> Hello.
> 
> Tell me please, who is now the fastest of these algorithms?
> 
> What remains of the available algorithms checksum algorithm by default?
> 
> Thanks.
> 

None of the old checksums were removed
This means the available checksums are (from fastest to slowest):

off (bad idea)
fletcher2 (not recommended, weak)
fletcher4 (default)
edon-r (not implemented, possibly insecure)
skein
sha512
sha256

-- 
Allan Jude