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Thanks waltar. I expect that should be a solution - thank you. Still - it's a bit of unwanted fluffing around. It would be very helpful if the ability to edit network settings could be added to the live restore process. Is there any process for requesting enhancements? Regards, Steve

We need to periodically test our backups and live restore functionality without disrupting the running VMs. We can test a static restore by choosing an unused VMID but without the ability to choose a different VLAN the live restore will conflict with the running VMs. Does anyone have a...

Here’s a related question - what if I want to trial a live restore of a system? I can now see how to avoid overwriting the source VM. But to avoid a conflict with the source VM I’d need to bring up the restore on a different VLAN. I can’t change this in the vm hardware because the live restore...

Got it :-) Thanks heaps for that.

Thanks for the reply dietmar. Can you provide some more detail please? I can do it using qmrestore, but I can't see how to do it from the GUI.

I'm sure this must have been asked already, but I can't find it. Simple question - How can I restore an entire VM, or spin up a quick recovery version of a VM, without overwriting the original VM, for example as part of a DR test? Thanks, Steve

Thanks all for your thoughts. waltar - The cards are PCIe4 x16 and are running in PCIe4 x16 slots. Blackice504 - yes a good point. It's not just the CPU that is temp sensitive. My fans are running fast even with idle CPU so the transceivers stay cool. The noise level is unimportant since the...

Hi, I've noticed that all of the 100G Mellanox NICs in my hosts are shown as 'degraded' by networkctl, although they seem to be working just fine. I understand that a bond can be degraded, but a single NIC? and all of the 100G NICs? Could this be a driver limitation? The enp197... and...

Many thanks. I’ll give it a shot.

Hi, I have a pair of 100G NICs on my proxmox hosts, and since I have bandwidth to kill I'm hoping to use them for three functions with approriate VLANs: management, client VM traffic, and iSCSI. For the management and client VM traffic I want to use these NICs in an active-backup bond, but...

Thanks - very much appreciated.

Thank you both for your suggestions. That's very helpful. What happens to running VMs if corosync fails? I'm coming from vSphere. We have configured the available options so that VMs will continue to run if vCenter disappears or if a host becomes isolated.

Hi, I'm building a new PVE kit with 6 hosts. I understand that Corosync pushes very little data but is sensitive to latency. I'll be using VLAN'd 100G NICs for storage, VM traffic and the PVE management GUI, but I thought I'd dedicate the 1G NICs that come standard with the servers to running...

Thanks again bbgeek. I think I do actually understand this now.

Thanks for the report card :). The fleecing mechanism actually sounds superior to the mechanism used in ESXi. The snapshot mechanism in ESXi can cause VMs to stun during the snapshot commit at the end of the backup. This has been improved over the years but it's still an issue which prevents us...

Thanks fabian. Sorry this has gone off-topic, but extremely useful information to me (and hopefully others). Sanity check my understanding of the CoW filter please: While a backup is in progress, if the guest writes to a block that has not yet been backed up then the data for that block will...

Thanks fabian. When you say the write is stalled, I assume you don't mean that the write from the guest OS is delayed until the data has been backed up - that could be many minutes, and the guest application wouldn't tolerate that. Perhaps you mean that the write is held in a temporary buffer...

I've been looking up QEMU resources to understand better how this mechanism works and I pretty much struck out - the official QEMU wiki dates to 2016. My understanding is that by 'blocking writes' you mean that QEMU directs the writes to a separate 'difference' file (I expect that 'file' is...

Thanks bbgeek. I understand. Much appreciated.

Thanks bbgeek. I have a lot to get my brain around before committing to a new architecture. I understand that iSCSI itself has no concept of snapshots. The process you describe via QEMU looks very similar to what ESXi does, in that it doesn't rely on snapshot capability in the storage, but...