Program file management system

A CPU unit for performing control by means of a CPU, comprising:

• a memory having a starting area and a saving area as program file storage areas;
• and
• a CPU section for performing a switchover from the saving area to the starting area and performing an operation in accordance with a program file stored in the starting area, said CPU section being operative in response to a program file store instruction to transfer the program file under execution to the saving area of another CPU unit to be stored therein in accordance with table information.

An operation management device for controlling a CPU unit,

• wherein said operation management device performs interfacing of a command from a user and also performs a control process including downloading of program files to the CPU unit, registration of table information in a table database and issuance of a program file store instruction.

A program file management method for managing a plurality of program files, comprising:

• performing, with respect to a plurality of CPU units each including a memory having a starting area and a saving area as program file storage areas, a switchover from the saving area to the starting area, to execute an operation in accordance with a program file stored in the starting area;
• and
• transferring, in response to a program file store instruction and in accordance with table information in an address management table indicating start addresses of stored program files and a destination CPU selection table indicating destination CPU units in which program files are to be saved, the program file under execution to the saving area of another CPU unit to be stored therein.

A WDM node for performing WDM communication, comprising:

• an OADX for subjecting an optical signal to optical cross-connect control to multiplex and demultiplex the optical signal;
• and
• a communication device including a plurality of CPU units each for performing, with respect to a memory provided therein and having a starting area and a saving area as program file storage areas, a switchover from the saving area to the starting area and performing an operation in accordance with a program file stored in the starting area, each said CPU unit being operative in response to a program file store instruction to transfer the program file under execution to the saving area of another CPU unit to be stored therein in accordance with table information, a database for holding the table information indicating start addresses of stored program files and destination CPU units in which program files are to be saved, and an operation management unit for performing interfacing of a command from a user and also performing a control process including downloading of program files to said CPU units, registration of the table information in said database and issuance of the program file store instruction.