Ceph ssd and nvme disk mix best practices

[waluszek]

Hello community, this is my first post so I'd like to say hello.

I need a hint. I have a cluster of 4 nodes, each node has 4 nvme 1.6TB disks and 4 SAS-SSD 1.6TB disk, how should the pool be created?
Should all drives work together? How will this affect performance nvme drives are faster than SSD, is cepch able to distinguish it.
Or should it be set up differently?

sorry for my poor english, it's not my primary language.

 

[shanreich]

It would make sense to create separate pools for each device class, so that only the devices of a specific class are included in the pool. This enables you to choose whether a disk uses NVMEs or SSDs as a storage. In our documentation [1] you can find instructions on how to achieve this.

[1] https://pve.proxmox.com/pve-docs/chapter-pveceph.html#pve_ceph_device_classes