You need two corosync links. For 12 nodes on gigabit I would use dedicated links for both, just in case, even if having it just for Link0 would be enough. Max I've got in production with gigabit corosync is 8 hosts, no problems at all.
Proxmox with 48 nodes
- Thread starter Nathan Stratton
- Start date
The number of cluster members is an inexact limit. that ACTUAL limit has to do with how much data the cluster members have to keep synchronized- if each of your cluster members had 400vms with continuous api traffic- your cluster would probably die due to tripping timeouts. if you have 5vms mostly sitting there and not being molested you'll be just fine.
Just for the record the VM config sizing and changes are related to the PXMCFS https://pve.proxmox.com/wiki/Proxmox_Cluster_File_System_(pmxcfs)
Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox