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List:       fedora-devel-list
Subject:    Re: Fedora 33 System-Wide Change proposal: Make btrfs the default file system for desktop variants
From:       Chris Murphy <lists () colorremedies ! com>
Date:       2020-07-11 15:28:11
Message-ID: CAJCQCtRYLox+Ouz_traUoeZgG4Oy29tLe4F07G+Bv-PYQTfTiw () mail ! gmail ! com
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On Sat, Jul 11, 2020 at 6:11 AM Artem Tim <ego.cordatus@gmail.com> wrote:
> 
> BTRFS WA is ~8 times higher than ext4. Average profit from compression about 50% \
> max. Not that hard arithmetic.

The paper is with respect to metadata write amplification. This has no
effect on data writes. Compression applies to data writes, not
metadata. As the data amount is significantly larger than metadata
(the file system itself), any reduction in data writes overwhelms the
metadata writes.


-- 
Chris Murphy
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