Storage best practices for large setups

Hi there,

currently one of my customers plans to migrate an existing VMWare environment to a KVM based solution.
The VMWare setup is pretty large with about 2.000 CPU cores, ~50TB memory and ~2.000 TB full-flash SAN storage.
Eventhough we would setup several Proxmox clusters, we still need a high performance storage solution which can handle arround ~750 TB.

So the question is, what's the suggested type of storage backend which should be used for that kind of setup?
BTW the new storage...

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