Mixing HDD and SSD in Ceph? or use gluster for HDD and Ceph for SSD?

Dec 26, 2018
We are currently building a Proxmox cluster with 3 nodes, with 2x Samsung SM863a (SSD) in each node for VM's. With a dedicated 10GBit storage network.
But we are also going to need Storage volumes for the VM's and space for backup. On HDD's-

One solution i was thinking of is adding HDD's to Ceph, but from what i have read that might kill the performance of the SSD's.

Another solution might to be add a replicated Glustefs volume on two of the servers, like HDD -> ZFS(raid10) -> Glusterfs. But this is another system to maintain.

The third solution might be to make two pool and configure ceph manually, like this:
But then the setup, and maintaining of the Ceph would get more complicated and manual.

What are your thoughts on this?
Thanks :)
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