GlusterFS - Define Failover Cluster

I am currently planning the storage infrastructure for our new application. Since performance is a big and important item on our list, I want to use SSDs for the production environment. We sell a product that generates a lot of data (image/video hosting), but since we are still a startup company, our budget is not endless.

I want to implement HA for our storage, but running two ~ 70 TB SSD clusters in distributed replication mode is pointless for me, since fortunately one node rarely fails. So I thought about running one SSD cluster in production while one HDD cluster acts as a failover that takes over if one node or the whole SSD cluster fails.

Is this feasible with GlusterFS (or a similar scalable distributed file system like cephfs) or is the whole concept stupid? The topic is still quite new to me, so I’m happy to learn something new!

Thank you.