How many Provisioning Services servers should the architect install in each of the three configured sites?

A single server in each datacenter would create a single point of failure, which is not suitable for a production environment requiring high availability.

Installing two Provisioning Services servers in each datacenter provides high availability and load balancing for vDisk streaming. This ensures that if one server fails, the other can continue to stream images to target devices, preventing service disruption and meeting production environment reliability requirements.

While three servers would provide even greater capacity, two servers are generally considered the minimum for high availability and redundancy without excessive resource allocation for typical sites.

This option suggests an uneven distribution across datacenters, which might not align with a standard high availability design for 'each of the three configured sites' unless specific load profiles dictate it.