Method of locating and downloading files on a network

• US 6,026,405 A
• Filed: 11/21/1997
• Issued: 02/15/2000
• Est. Priority Date: 11/21/1997
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Kuettel, David Joseph, Arda, Sreedhar Reddy, Edwards, William Mitchell
• Primary Examiner(s): AMSBURY, WAYNE P
• Application Number:
  US08/976,381
• Time in Patent Office: 816 Days
• Field of Search: 707/10, 707/101, 707/200
• US Class Current: 1/1
• CPC Class Codes: G06F 16/10 File systems; File servers
• CPC Class Codes: Y10S 707/99942 Manipulating data structure, e.g. compression, compaction, compilation

Abstract

An apparatus and method of mapping a file name to a computer system in a network of computer systems are provided. In a first embodiment, a list of names of the computer systems starting with a root name is created. The filename itself starts with a root name and consists of an aggregation of names. When the filename is obtained, each name is matched one at a time and in the order of appearance to the names in the list. In order for a match, the order of appearance of the names in the list of names and that of the names in the filename must be the same. The last name in the list of names to be matched with a name in the filename represents a computer system within which the file is contained. In a second embodiment, the list of names is in the form of a tree of names. Matching the names of the tree to the names in the filename includes traversing a branch of that tree to a leaf node, the leaf node being the last node in the tree.

Claims

1. A method, for use in an information handling system, of mapping a file name to a computer system containing said file, said computer system containing said file being in a network of computer systems, said file name being a composite name, said method comprising the steps of:

creating a list of names of said computer systems, said list of names being arranged in an order wherein the first name in the list is the name of a root computer system, each succeeding name being the name of a computer system located logically the closest to the root computer system;

obtaining said file name; and

matching each name in said composite file name to each name in said list, the names in said composite file name being in the same order of appearance as that in the list of names, a last name to be matched being said computer system containing said file.

2. The method of claim 3 further comprising the steps of obtaining an address of said computer system containing said file from a table containing a set of data items.

3. The method of claim 1 wherein said list of names is in the form of a tree of names wherein two or more computer systems located logically at the same proximity to said root computer system create, respectively, two or more branches of said tree.

4. The method of claim 3 wherein said root name represents which company presently owns said file.

5. The method of claim 4 wherein each name of said file name is separated by a period.

6. The method of claim 5 wherein said corresponding table further includes a filegroup name, said filegroup name indicating all files of a program.

7. The method of claim 6 wherein said corresponding table further includes a checksum number, said checksum number being used to quickly identify whether said filegroup is obsolete.

8. The method of claim 7 wherein said corresponding table further includes an indication as to whether said file has been stored locally.

10. The apparatus of claim 1 further comprising means for obtaining an address of said computer system containing said file from a table containing a set of data items.

9. An apparatus, for use in an information handling system, for mapping a file name to a computer system containing said file, said computer system being in a network of computer systems, said file name being a composite name, said apparatus comprising:

means for creating a list of names of said computer systems, said list of names being arranged in an order wherein the first name in the list is the name of a root computer system, each succeeding name being the name of a computer system located logically the closest to the root computer system;

means for obtaining said file name; and

means for matching each name in said composite file name to each name in said list, the names in said composite file name being in the same order of appearance as that in the list of names, a last name to be matched being said computer system containing said file.

11. The apparatus of claim 9 wherein said list of names is in the form of a tree of names wherein two or more computer systems located logically at the same proximity to said root computer system create, respectively, two or more branches of said tree.

12. The apparatus of claim 11 wherein said root name represents which company presently owns said file.

13. The apparatus of claim 12 wherein each name of said file name is separated by a period.

14. The apparatus of claim 13 wherein said corresponding table further includes a filegroup name, said filegroup name indicating all files of a program.

15. The apparatus of claim 14 wherein said corresponding table further includes a checksum number, said checksum number being used to quickly identify whether said filegroup is obsolete.

16. The apparatus of claim 15 wherein said corresponding table further includes an indication as to whether said file has been stored locally.

17. A computer program product for mapping a file name to a computer system containing said file, said computer program product having computer usable program code means embodied in a medium, said file name being a composite name, said computer system being in a network of computer systems, said method comprising:

computer usable program code means for creating a list of names of said computer systems, said list of names being arranged in an order wherein the first name in the list is the name of a root computer system, each succeeding name being the name of a computer system located logically the closest to the root computer system;

computer usable program code means for obtaining said file name; and

computer usable program code means for matching each name in said composite file name to each name in said list, the names in said composite file name being in the same order of appearance as that in the list of names, a last name to be matched being said computer system containing said file.

18. The computer program product of claim 17 wherein said list of names is in the form of a tree of names wherein two or more computer systems located logically at the same proximity to said root computer system create, respectively, two or more branches of said tree.

19. The computer program product of claim 17 further comprising computer usable program code means for obtaining an address of said computer system containing said file from a table containing a set of data items.

20. The computer program product of claim 19 wherein said root name represents which company presently owns said file.

21. The computer program product of claim 20 wherein each name of said file name is separated by a period.

22. The computer program product of claim 21 wherein said corresponding table further includes a filegroup name, said filegroup name indicating all files of a program.

23. The computer program product of claim 22 wherein said corresponding table further includes a checksum number, said checksum number being used to quickly identify whether said filegroup is obsolete.

24. The computer program product of claim 23 wherein said corresponding table further includes an indication as to whether said file has been stored locally.