From: Fiona Ebner <f.ebner@proxmox.com>
To: Alexander Burke <alex@alexburke.ca>,
Proxmox VE user list <pve-user@lists.proxmox.com>
Subject: Re: [PVE-User] Unresponsive VM(s) during VZdump
Date: Fri, 10 May 2024 11:07:59 +0200 [thread overview]
Message-ID: <1681878c-ef3a-484a-a725-4c688467a5df@proxmox.com> (raw)
In-Reply-To: <11db3d6f-1879-44b3-9f99-01e6fde6ebc8@alexburke.ca>
Am 09.05.24 um 13:24 schrieb Alexander Burke:
> Hello all,
>
> My understanding is that if the backing store is ZFS, a snapshot of the zvol underlying the guest's disk(s) is instant and atomic, and the snapshot is what gets backed up so fleecing is moot. Am I wrong on this?
>
The snapshot-level backup in Proxmox VE is not done on the storage
layer, but in the QEMU block layer. That makes it independent of
whether/how the underlying storage supports snapshots and allows for
dirty tracking for incremental backup. See here for further
information/discussion why it's not done on the storage layer:
https://pve.proxmox.com/pve-docs/chapter-vzdump.html#_vm_backup_fleecing
https://bugzilla.proxmox.com/show_bug.cgi?id=3233#c19
Best Regards,
Fiona
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next prev parent reply other threads:[~2024-05-10 9:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-09 8:35 Iztok Gregori
2024-05-09 9:30 ` Mike O'Connor
2024-05-09 10:02 ` Iztok Gregori
2024-05-09 10:11 ` Mike O'Connor
2024-05-09 11:24 ` Alexander Burke via pve-user
[not found] ` <11db3d6f-1879-44b3-9f99-01e6fde6ebc8@alexburke.ca>
2024-05-10 5:21 ` Mike O'Connor
2024-05-10 9:07 ` Fiona Ebner [this message]
2024-05-10 7:36 ` Iztok Gregori
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