From: Christoph Hellwig <hch@infradead.org>
To: Gerhard Wiesinger <lists@wiesinger.com>
Cc: Theodore Ts'o <tytso@mit.edu>, linux-ext4@vger.kernel.org
Subject: Re: Transparent compression with ext4 - especially with zstd
Date: Tue, 21 Jan 2025 23:37:38 -0800 [thread overview]
Message-ID: <Z5CgQosGsbxbbEIL@infradead.org> (raw)
In-Reply-To: <b8663f69-cdaf-4c05-b99f-cd4105023264@wiesinger.com>
On Wed, Jan 22, 2025 at 08:29:09AM +0100, Gerhard Wiesinger wrote:
> BTW: Why does it break the ACID properties?
It doesn't if implemented properly, which of course means out of place
writes.
The only sane way to implement compression in XFS would be using out
of place writes, which we support for reflinks and which is heavily
used by the new zoned mode. For the latter retrofitting compression
would be relatively easy, but it first needs to get merged, then
stabilize and mature, and then we'll need to see if we have enough
use cases. So don't plan for it.
next prev parent reply other threads:[~2025-01-22 7:37 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-19 14:37 Transparent compression with ext4 - especially with zstd Gerhard Wiesinger
2025-01-21 4:01 ` Theodore Ts'o
2025-01-21 9:42 ` Artem Blagodarenko
2025-01-21 18:47 ` Gerhard Wiesinger
2025-01-21 19:33 ` Theodore Ts'o
2025-01-22 0:19 ` Kiselev, Oleg
2025-01-22 6:10 ` Gerhard Wiesinger
2025-01-22 7:29 ` Gerhard Wiesinger
2025-01-22 7:37 ` Christoph Hellwig [this message]
2025-01-22 13:19 ` Theodore Ts'o
2025-01-22 14:11 ` Christoph Hellwig
2025-01-21 21:26 ` Dave Chinner
2025-01-22 6:47 ` Gerhard Wiesinger
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