Re: [pve-devel] [PATCH v2 qemu-server 1/1] implement external snapshot

["DERUMIER, Alexandre via pve-devel" <pve-devel@lists.proxmox.com>]

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From: "DERUMIER, Alexandre" <alexandre.derumier@groupe-cyllene.com>
To: "pve-devel@lists.proxmox.com" <pve-devel@lists.proxmox.com>, "f.gruenbichler@proxmox.com" <f.gruenbichler@proxmox.com>
Subject: Re: [pve-devel] [PATCH v2 qemu-server 1/1] implement external snapshot
Date: Wed, 23 Oct 2024 18:09:31 +0000
Message-ID: <4abf03f224082e0fe20b248840b590f06c43fc5d.camel@groupe-cyllene.com>

ok, I think it could be possible to use blockdev-reopen to rename
current filename
https://lists.gnu.org/archive/html/qemu-devel/2021-05/msg04455.html

example: take snapshot : snap1 on vm-disk-100-disk-0.qcow2

- create a hardlink: ln vm-disk-100-disk-0.qcow2 vm-disk-100-disk-0-
snap1.qcow2

- qmp blockdev-reopen file vm-disk-100-disk-0-snap1.qcow2

- rm vm-disk-100-disk-0.qcow2

- create a snapshot with a new file vm-disk-100-disk-0.qcow2 with vm-
disk-100-disk-0-snap1.qcow2 as backing file



I'll try to test this tomorrow !






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