Can we replicate the ACCDOCS folders across 2 primary locations?

We are investigating various HA solutions and options to reduce response times for end users. We are running on-premise.

One thing we are wanting to understand better is how the business data (specifically all of the documents stored in the APPIAN_HOME/_admin/accdocs folders) can be configured. We currently have around 3 million documents in these folders and expected this number to at least triple over the next few months. 

Can we have these files replicated/synchronized across data centers? Is this supported via the out of the box HA architecture? (It doesn't seem to be)

Any help would be appreciated.

thanks