EP0278472A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Directory management in distributed data processing system network
Assignee: International Business Machines Corp
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Filing: 1988-02-09
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Granted: —
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Expires: 2008-02-09
Abstract
Abstract A directory management technique is provided for a plurality of data processing systems which are connected together in a network. In the system, when a local, or client, data processing system interrogates a remote, or server, data processing system for a unit of directory information, the server system is enabled to automatically send additional units of pertinent directory information back to the client system in response to a subsequent change in the directory structure of the server system. If the server system is unable to continue updating the client system, for any of a plurality of possible reasons, the server system informs the client system of this fact, which enables the client system to purge itself of the formerly stored directory cache entry relative to this path, since the client system can no longer consider this cached path information to be currently correct.
Inventors
- 👤 Donavon William Johnson
- 👤 Amal Ahmed Shaheen-Gouda
- 👤 Todd Allen Smith
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:07
CPC Classifications
G; G06; G06F; G06F12/00; G06F12/02; G06F12/08; G06F12/0802; G06F12/0806; G06F16/00; G06F16/10; G06F16/90; G06F16/901; G06F16/9017; G06F16/902; H; H04; H04L; H04L69/00; Y; Y10; Y10S; Y10S707/00; Y10S707/99951; Y10S707/99952
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
A method of operating a disributed data processing system network comprising the steps of: saving, in a first system in the network, a first unit of directory path information related to a directory in a second system in the network in response to an enquiry by the first system about the directory structure of the second system; and thereafter automatically sending a notification from the second system to the first system in response to any subsequent change in the directory structure of the second system.
Claim 2
Independent Claim
85 words
A method of operating a disributed data processing system network comprising the steps of: saving, in a first system in the network, a first unit of directory path information related to a directory in a second system in the network in response to an enquiry by the first system about the directory structure of the second system; and thereafter automatically sending a notification from the second system to the first system in response to any subsequent change in the directory structure of the second system.
Claim 3
Dependent Claim
22 words
A method accoring to claim 1 wherein said notification instructs said first system to erase said first unit of directory path information.
Claim 4
Dependent Claim
43 words
A method according to Claim 1 or Claim 2 wherein said first system saves additional units of directory path information about said second system and said notification instructs said first system to erase all units of directory path information about said second system.
Claim 5
Dependent Claim
33 words
A method according to Claim 2 wherein said notification instructs said first system to erase said first unit of directory path information in response to the occurence of at least one inhibiting condition.
Claim 6
Dependent Claim
18 words
A method according to Claim 4 wherein said inhibiting condition is a saturation of second system process resources.
Claim 7
Dependent Claim
25 words
A method according to Claim 4 wherein said inhibiting condition is a saturation of process resources available for the task of automatically sending said notifications.
Claim 8
Dependent Claim
22 words
A method according to Claim 4 wherein said inhibiting condition is an unavailability of communications resource between said second and first systems.
Claim 9
Dependent Claim
22 words
A method according to Claim 4 wherein said inhibiting condition is a requirement to disconnect communications between said second and first systems.
Claim 10
Dependent Claim
29 words
A method according to Claim 4 wherein said inhibiting condition is a lack of a recent inquiry from said first system to said second system regarding additional directory information.
Claim 11
Independent Claim
101 words
A method according to any one of the previous claims further comprising the steps of: automatically sending notification from said second system to a third system in response to a previous inquiry by said third system of a directory structure of said second system and a subsequent change in the directory structure of said second system; and notifying said first system that said second system is unable to send further additional units of directory information in response to at least one inhibiting condition and when said inquiry by said third system was more recent than said inquiry by said first system.
Claim 12
Dependent Claim
84 words
A distributed data processing systems network in which a first system saves a first unit of directory path information about a second system in response to an inquiry by said first system regarding a directory structure of said second system, comprising means for automatically sending a notification from said second system to said first system in response to a subsequent change in the directory structure of said second system and means responsive to said notification for erasing said first unit of directory path information.
Claim 13
Dependent Claim
84 words
A distributed data processing systems network in which a first system saves a first unit of directory path information about a second system in response to an inquiry by said first system regarding a directory structure of said second system, comprising means for automatically sending a notification from said second system to said first system in response to a subsequent change in the directory structure of said second system and means responsive to said notification for erasing said first unit of directory path information.
Claim 14
Dependent Claim
52 words
A system according to Claim 11, further comprising means in said first system for saving additional units of directory path information about said second system and said means for automatically sending a notification includes means for instructing said first system to erase all units of directory path information about said second system.
Claim 15
Dependent Claim
32 words
A system according to Claim 11, wherein said means for automatically sending a notification further comprises means for automatically sending said notification in response to occurence of at least one inhibiting condition.
References Cited (Backward Citations)
No citation records indexed.
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