Method for multiple programs management within a network having a server computer and a plurality of remote computers

• US 4,780,821 A
• Filed: 07/29/1986
• Issued: 10/25/1988
• Est. Priority Date: 07/29/1986
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Crossley, James F.
• Primary Examiner(s): Zache, Raulfe B.
• Assistant Examiner(s): Lee, Thomas C.
• Application Number:
  US06/890,389
• Time in Patent Office: 819 Days
• Field of Search: 364/200 MS File, 364/900 MS File, 340/825.3, 340/825.31
• US Class Current: 718/100
• CPC Class Codes: G06F 9/52 Program synchronisation; Mutual exclusion, e.g. by means of semaphores
• CPC Class Codes: H04L 69/00 Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass networks security protocols H04L9/40; wireless communication networks H04W

Abstract

The procedure which allows users of a computer system comprising a plurality of computers connected in a local area network to share both file resources and application programs on the local area network without modification to existing programs which were designed to run in a non-network environment is disclosed. The local area network comprises a server computer and at least one remote computer. Starting the network comprises an initial program load of the operating system for each of the computers, loading the local area network control program, and then loading a hypervisor or "node enabler" program. At each of the remote computers, a request to load a program or access a data file is converted by the "node enabler" to a file sharing and record locking protocol message with is transmitted to the server computer. The server computer stores a program matrix with entries indicating which programs can be run on the network without conflicts with other systems including the server computer. The server computer also maintains a list of currently running programs and accessed data files. By comparing the remote computer request with the program matrix and the list of currently running programs and accessed data files, a decision to grant a remote computer'"'"'s request is made. In addition, by recording a unique identification number for each remote computer signed on to the network at the server computer, control of access to licensed programs is maintained.

Claims

1. A method for allowing one or more remote computers to execute one or more application programs and to share data files under the control of a server computer connected in a network with said one or more remote computers without modification of existing application programs which were designed to operate in a non-network environment comprising:

establishing at said server computer a program matrix with entries indicating whether a program can be run while another program or group of programs are being run on the network;

maintaining at said server computer a list of the programs currently being run on the network and data files currently being accessed or otherwise not availblbe for access;

transmitting to said server computer from each remote computer a unique identification;

recording the unique identifications of the remote computers at the server computer to provide an indication that the remote computers are authorized to use application programs and access data files;

converting a data management request originating at said server computer or one of said remote computers into a file sharing and record locking protocol request message;

transmitting said file sharing and record locking protocol request message originating at one of said remote computers to said server computer;

checking said program matrix and said list to determine if said request message poses a conflict with a currently running program; and

checking the recorded unique identifications of the remote computers to determine if the remote computer which transmitted said request message is authorized to run an application program or access a data file.

2. The method recited in claim 1 further comprising:

granting said request message if the request message does not pose a conflict with a currently running program or data file and if the remote computer which transmitted said request message is authorized to run a requested application program or access a requested data file; and

updating said list;

otherwise, denying the request message.

3. The method recited in claim 2 further comprising:

transmitting an information message to a remote computer from which said request message originated indicating that a conflict exists when said request message is denied; and

displaying to a user of the server computer or a remote computer from which the request message originated that a conflict exists and that the request message is denied.

4. A procedure which allows users of a computer system comprising a plurality of computers connected in a local area network to share both file resources and application programs on the local area network without modification of existing application programs which were designed to operate in a non-network environment wherein one of said computers is designated a server computers and the remaining ones of said plurality of computers are designated remote computers comprising:

establishing at said server computer a table of said application programs with entries in said table indicating whether any one of said programs or a group of said programs can be run concurrently while other programs are being run by computers on said network including said server computer;

maintaining at said server computer a list of programs currently in use by computers on said network and data files currently being accessed by computers on said network;

converting at one of said remote computers a request to load an application program or a request to access a data file into a file sharing and record locking protocol message;

transmitting said file sharing and record locking protocol message to said server computer on said local area network; and

checking said table and list to determine whether the remote computer can load a requested program or access a requested data file.

5. The procedure according to claim 4 further comprising:

providing each remote computer on said local area network with a unique identification number;

transmitting said unique identification number from a remote computer to said server computer when said remote computer signs on to said local area network;

recording at said server computer the unique identification numbers of all remote computers which have signed onto said local area network;

maintaining a list of licensed users corresponding to said unique identification numbers; and

checking the recorded unique identification numbers and said list of licensed users to determine for each request by a remote computer to load a program or access a data file whether that remote computer is authorized to load a requested program or access a requested data file.

6. The procedure according to claim 4 further comprising updating said list whenever a request to load a program or access a data file is granted or whenever a remote computer is no longer running a previously loaded program or accessing a data file.