From: Roman Mamedov <rm@romanrm.net>
To: Christoph Anton Mitterer <calestyo@scientia.org>
Cc: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: exactly shrinking btrfs on a device?
Date: Sat, 6 Apr 2024 03:37:00 +0500 [thread overview]
Message-ID: <20240406033700.2c2404c1@nvm> (raw)
In-Reply-To: <896a5d36071a30605c38779dd03103b6429ebcae.camel@scientia.org>
On Sat, 06 Apr 2024 00:22:52 +0200
Christoph Anton Mitterer <calestyo@scientia.org> wrote:
> If that btrfs on some given device was placed within some other
> container (e.g. a partition, LUKS, LVM, etc.) one likely wants to next
> shrink that outer container.
>
> How does one do that? I mean, how do I find out the exact last by that
> btrfs uses on a particular device?
I do it like this:
Shrink it with a large headroom left to spare, e.g. by 50-100 GB more than
necessary (or say by 10%, if it is small). Then shrink the outer container.
Then grow the FS using the "max" keyword, to occupy the entire new size of the
container.
--
With respect,
Roman
next prev parent reply other threads:[~2024-04-05 22:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-05 22:22 exactly shrinking btrfs on a device? Christoph Anton Mitterer
2024-04-05 22:37 ` Roman Mamedov [this message]
2024-04-05 22:41 ` Christoph Anton Mitterer
2024-04-06 5:03 ` Andrei Borzenkov
2024-04-07 2:52 ` Christoph Anton Mitterer
2024-04-07 14:29 ` Roman Mamedov
2024-04-08 2:00 ` Christoph Anton Mitterer
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