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List:       fedora-devel-list
Subject:    Re: btrfs hash algorithm (should xxhash be the default?)
From:       Matthew Miller <mattdm () fedoraproject ! org>
Date:       2021-02-01 14:42:59
Message-ID: 20210201144259.GA32170 () mattdm ! org
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On Sun, Jan 31, 2021 at 08:25:22PM +0100, Florian Weimer wrote:
> > Plus, it's 64 bit instead of 32 bit. The 256-bit algorithms are obviously
> > much, much slower and probably not right for a default, but should we
> > consider making xxhash the default for Fedora Linux systems with
> > btrfs?
> 
> Is this for an integrity check?  Wouldn't it be wise to use a CRC due to
> its well-understood statistical properties?

I will defer to the crypto experts; from what I can see this is a relatively
new algorithm but there are quite a few papers (and a lot more blogs) which
reference it and it seems generally regarded to have good non-cryptographic
hash properties.

-- 
Matthew Miller
<mattdm@fedoraproject.org>
Fedora Project Leader
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