2 clusters vs. 1, ceph and VM clusters

[brucexx]

I have 7 nodes total. 4 dedicated for VMs and 3 for Ceph only (under Proxmox). For about 2 years they were running as two separate clusters with no issues but now we are reinstalling everything and I am wondering if there would be an advantage to create a 7 node single cluster. Any advice, any advantages ?

Again Ceph nodes only for storage (they have different hardware specification and cannot be used for VMs) and the other 4 nodes VMs only.

Thank you

 

[Belokan]

If the VMs cannot migrate to the storage nodes "in case of emergency" I don't see any reason to merge the 2 clusters.

 

[brucexx]

I don't want to merge two clusters. I want to add a node with a slightly different hardware to the ceph cluster that is ONLY running ceph storage and NOT VMs on it.

 

[sg90]

I think you really have no huge difference apart from having the single pane of glass to see both CEPH/Computer under the one Proxmox viewpoint vs having to log into two separate interfaces.

You are nowhere near any node limits with Proxmox, only benefit I can see is you can upgrade the compute node's to the latest versions and keep the CEPH updates till some later time when any bugs have been resolved, vs one cluster where keeping versions the same is fairly important.