Re: [pve-devel] [PATCH-SERIES v6 pve-storage/qemu-server/pve-qemu] add external qcow2 snapshot support - DERUMIER, Alexandre via pve-devel

From: "DERUMIER, Alexandre via pve-devel" <pve-devel@lists.proxmox.com>
To: "pve-devel@lists.proxmox.com" <pve-devel@lists.proxmox.com>,
	"f.ebner@proxmox.com" <f.ebner@proxmox.com>
Cc: "DERUMIER, Alexandre" <alexandre.derumier@groupe-cyllene.com>
Subject: Re: [pve-devel] [PATCH-SERIES v6 pve-storage/qemu-server/pve-qemu] add external qcow2 snapshot support
Date: Thu, 5 Jun 2025 14:08:21 +0000	[thread overview]
Message-ID: <mailman.262.1749132510.395.pve-devel@lists.proxmox.com> (raw)
In-Reply-To: <59a59682-d54e-4ba2-94da-bbee253eeacc@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.ebner@proxmox.com" <f.ebner@proxmox.com>
Subject: Re: [pve-devel] [PATCH-SERIES v6 pve-storage/qemu-server/pve-qemu] add external qcow2 snapshot support
Date: Thu, 5 Jun 2025 14:08:21 +0000
Message-ID: <0aa862ab988ff9df50f4637f3712f137f23c34c2.camel@groupe-cyllene.com>

Am 03.06.25 um 09:55 schrieb Alexandre Derumier via pve-devel:
> This new patch series enable blockdev for qemu machine > 10.0 to
> avoid breaking efidisk and maybe
> potential migrations bug

>>Did you see any actual issues with migration or mirroring the EFI
>>disk
>>now or is this just a gut feeling?

I don't have tested it to be honest (because don't use efi in
production, and I really don't known how to verify that it's working
fine after a migration+ also the size param) , so it was more by
security

but as it's attached to -machine... directly instead -drive, I really
don't known.  and they was also the version gate for old machine
version without raw support.

We also need to handle migration+storage motion for local dirve between
pve8->pve9, and
I don't have tested if pve8 can still use drive-mirror to pve9 nbd
blockdev.

I only have tested live vm migration with shared storage between pve8
to pve9 without efi,
and the switch from drive to blockdev was working fine.

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