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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...

Thanks for the replies. How would we go about making consistent point-in-time backups of VMs running on StarWind iSCSI storage using PBS?

Regarding the references to Proxmox not supporting VM snapshots with iSCSI - is this just with its own iSCSI target? We have been using StarWind VSA with VMware for years and are looking to switch to Proxmox. I'm planning to continue using StarWind as the iSCSI target. Does the loss of snapshot...

Hi, Newbie here. Worse ... a Windows newbie lol. I've run up a three-node PVE cluster with Ceph, and so far all good. One thing I'd love is to be able to present Ceph storage to my existing vSphere infrastructure as iSCSI. It appears that the HA iSCSI gateway is included in Ceph as per...