Hardware Requirement with Network & Storage


New Member
Feb 12, 2020
Hi Team,
pls share 100 VMs hardware requirements with 3 nodes setup with Network & Ceph storage.

The requirements for Ceph are described in our documentation [0]. Proxmox VE itself needs about 1GB of RAM.

How much computing power and memory you need for your VMs is something you need to know.

One important hint: use a dedicated physical network for the PVE cluster communication (corosync). A 1Gbit connection is more than fast enough. Corosync does not neet a lot of bandwidth but really needs low latency. Once you put it on the same physical interface with other services, especially services that can be very network intense like Ceph, you will easily run into a situation where the network gets congested and the PVE cluster falls apart. With HA enabled you can have all your cluster nodes reset because they lost quorum.

You can configure more corosync links as a fallback for corosync to switch to should the primary dedicated network fail for some reason (e.g. tripping over a cable, replacing a cable,...)

[0] https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_precondition


The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!