Re: [pve-devel] TrueNAS over iSCSI: Snapshot Management

[Lorne Guse via pve-devel <pve-devel@lists.proxmox.com>]

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From: Lorne Guse <boomshankerx@hotmail.com>
To: Morgan Littlewood <morgan@truenas.com>
Cc: Proxmox VE development discussion <pve-devel@lists.proxmox.com>, "m.carrara@proxmox.com" <m.carrara@proxmox.com>
Subject: Re: TrueNAS over iSCSI: Snapshot Management
Date: Mon, 6 Oct 2025 01:09:53 +0000
Message-ID: <DM6PR17MB3466C924D9FC9565703D5B64D0E3A@DM6PR17MB3466.namprd17.prod.outlook.com>

Ok, I won't overcomplicate it then.
________________________________
From: Morgan Littlewood <morgan@truenas.com>
Sent: Sunday, October 5, 2025 4:02 PM
To: Lorne Guse <boomshankerx@hotmail.com>
Cc: Proxmox VE development discussion <pve-devel@lists.proxmox.com>; m.carrara@proxmox.com <m.carrara@proxmox.com>
Subject: Re: TrueNAS over iSCSI: Snapshot Management


I'd recommend that Proxmox do the snapshots (periodic or not)  so thta it is aware of all snapshots and their retention time.   It is the master and decides when snapshots should be deleted.

Proxmox also has a schance to quisece the VMs and so the snapshots will be application and not just crash-consistent. This is a cleaner experience for the VMs and users.

TrueNAS will just take, list and delete the snapshots efficiently based on plugin and API request.





On Sat, Oct 4, 2025 at 9:11 PM Lorne Guse <boomshankerx@hotmail.com<mailto:boomshankerx@hotmail.com>> wrote:
I was wondering if anyone got a chance to see this message. I'd like to know if there is a mechanism for importing TrueNAS snapshots into Proxmox.

This would allow things like periodic snapshots on the TrueNAS side to integrate into Proxmox.

--
Lorne Guse
________________________________
From: Lorne Guse <boomshankerx@hotmail.com<mailto:boomshankerx@hotmail.com>>
Sent: Saturday, September 27, 2025 10:45 AM
To: Proxmox VE development discussion <pve-devel@lists.proxmox.com<mailto:pve-devel@lists.proxmox.com>>; m.carrara@proxmox.com<mailto:m.carrara@proxmox.com> <m.carrara@proxmox.com<mailto:m.carrara@proxmox.com>>; Morgan Littlewood <morgan@truenas.com<mailto:morgan@truenas.com>>
Subject: TrueNAS over iSCSI: Snapshot Management

I'd like to get some input on snapshot management relating to TrueNAS. Currently, Proxmox does not allow for multigeneration rollback of snapshots.

TASK ERROR: can't rollback, 'preupgrade' is not most recent snapshot on 'nas:vm-803-disk-0'

I was wondering if there is a way for Proxmox to allow for the use of TrueNAS periodic snapshots without breaking Proxmox snapshots.

Is there a way to import TrueNAS snapshots into Proxmox via the API?

Could multi-generation rollback work because TrueNAS supports it?


--
Lorne Guse

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