Investigate and propose changes on Docs, Tests and broker configurations to improve the customer experience when the broker is using remote disks eg NFS, SAN ,...

Our current reccomandation for *nix users using remote disks, regardless any performance target, is to still use ASYNCIO journal, but this requires customers to take care of providing a reliable and stable remote disk behaviour.
A remote disk misconfiguration can make ASYNCIO I/O operations to pile-up on kernel for undefined amounts of time, depending on the severity of a network glitch/outage, making the broker to time-out (with an I/O critical error) and shutdown itself.

The motivation of this issue is to improve the user experience with the broker, proposing/documenting and testing a solution that will met the required reliability while preserving enough performance to meet the target of most customers.