Proxmox VE 7.4-16 Communication Failure Storage Problem


New Member
Sep 7, 2023
Good afternoon,

I run a Proxmox cluster on a dedicated machine, which is connected to an NFS share. The VMs are running on Proxmox, whilst the disks are stored on the NFS share. Recently, we have hit a startling problem, we have deployed a fresh vanilla Proxmox, and configured the NFS file share. Recently, when we exceeded having 790 virtual machine disks, with around 659 virtual machines, the Proxmox UI showing the NFS server came to a grinding halt.

To confirm, the NFS share is still viewable and accessible from the CLI, when you SSH into the Proxmox node. But on the UI, it shows up as communication failure (time out). I can add files to the share via the CLI, remove files, but it seems to be completley inaccessible from the Proxmox Web UI, always showing up as a communication failure.

It turns out Promox appears to have an upper limit of 7000 VMs on an individual node. A Proxmox node, despite the hardware underneath, will suffer performance degradation after this point. This might be a limitation with using HDDs over SSDs.
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