Allowing failover servers to handle different functions within the exported file system
removes the problem of requiring a distributed locking protocol.
If only one server is active in a pair, the need for high-speed server interconnect is avoided.
This allows the use of existing high-availability solutions, instead of inventing a new one.
This simpler solution comes at a price the cost of which is the need to manage a more
complex file name space. Since there is now not a single file system, administrators
must remember where all services are located a complexity not easily dealt with.
is still needed to redirect requests to backend
servers. Backend file space integrity is the responsibility of the administrator.