From: Roman Mamedov <rm@romanrm.net>
To: Yuwei Han <hrx@bupt.moe>
Cc: dsterba@suse.cz, linux-btrfs@vger.kernel.org
Subject: Re: [RFC] New ioctl to query deleted subvolumes
Date: Fri, 11 Oct 2024 17:20:43 +0500 [thread overview]
Message-ID: <20241011172043.122e81ff@nvm> (raw)
In-Reply-To: <E2F46BD92527EA46+29cb502c-a5ee-48db-a439-ab692a3747b9@bupt.moe>
On Fri, 11 Oct 2024 20:06:00 +0800
Yuwei Han <hrx@bupt.moe> wrote:
> There is a misunderstanding. What I mean is that why users need to
> "confirm" subvol is deleted? I can't come up with actual usage. Hope you
> can help me with that.
A backup system may delete outdated subvolumes first, then wait until the
space has actually freed up, before copying new data; otherwise it could run
out of disk space. Especially considering that IO from starting to copy
without such a wait would interfere with the cleaner process IO, resulting in
it taking a longer time to finish.
Or in my case I also wait until deleted subvolumes have been freed up *after*
a backup, to then record how much remaining space a backup disk actually has,
before unmounting it and putting into storage.
--
With respect,
Roman
next prev parent reply other threads:[~2024-10-11 12:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-09 18:03 [RFC] New ioctl to query deleted subvolumes David Sterba
2024-10-10 12:29 ` Yuwei Han
2024-10-10 17:08 ` David Sterba
2024-10-11 12:06 ` Yuwei Han
2024-10-11 12:20 ` Roman Mamedov [this message]
2024-10-12 1:45 ` Yuwei Han
2024-10-11 15:48 ` David Sterba
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20241011172043.122e81ff@nvm \
--to=rm@romanrm.net \
--cc=dsterba@suse.cz \
--cc=hrx@bupt.moe \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.