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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 14:36:50
Message-ID: 20210201143650.GB27776 () mattdm ! org
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On Mon, Feb 01, 2021 at 01:24:53PM +0000, David Howells wrote:
> Matthew Miller <mattdm@fedoraproject.org> 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?
> Does this affect what's on disk?

Yes; it changes the checksums stored with each block to be in the selected
format. This can only be changed at filesystem creation time.

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