A system which includes at least one client, a plurality of file servers, each having a file system, and a switch logically arranged between the client and the plurality of file servers to provide file access services which virtually render the plurality of file systems accessible as a single file system, termed a \u2018pseudo file system\u2019, when viewed from the terminal. The mode switching unit effects switching to the photovoltaic power generation mode by connecting the p-type semiconductor layers in parallel with each other and the n-type semiconductor layers in parallel with each other between the plurality of pn stacks. The spray nozzle includes a rigid plastic cap having a spray aperture at a distal end of the nozzle for delivering the liquid substance to the nasal passage. An interconnect structure is formed through the encapsulant outside a footprint of the semiconductor die and electrically connected to the conductive layer. The secondary server obtains a second update command based on the first update command from the primary database and applies the second update command to a secondary table in the secondary database using the secondary federated table.