Network control system for dynamically switching a logical connection between an identified terminal device and an indicated processing unit
First Claim
1. A control apparatus for dynamically switching a logical session in an information processing system in which a plurality of terminal devices are connected to a plurality of processing units via at least one communication control processor, each of the processing units executes one or a plurality of programs each of which can be used by any one of the terminal devices, the communication control processor comprising:
- first storage means for storing histories of command data transactions corresponding to the respective terminal devices;
second storage means for storing first identification data on the processing units connected to the respective terminal devices, second identification data indicative of whether the respective processing units are usable or unusable, and third identification data identifying replacing one of the processing units which can replace the respective processing units; and
first control means for identifying on the basis of the first identification data, when the second identification data indicates that a processing unit is unusable, a terminal device that is logically connected to the processing unit and has used one of the programs having been executed by the processing unit among the plural programs executed by the processing units, for retrieving from the first storage means histories of command data transactions of the identified terminal device, for automatically creating a first command message to disconnect the logical connection between the processing unit and the identified terminal device, for delivering the first command message to the processing unit, for automatically establishing a logical connection between a replacing processing unit replacing the processing unit and the identified terminal device on the basis of the third identification data stored in the second storage means, for automatically creating a second command message for allowing the identified terminal device to be used continuously on the basis of the previously retrieved histories of command data transactions and delivering the second command message to the replacing processing unit.
1 Assignment
0 Petitions
Accused Products
Abstract
A control method and apparatus for dynamically switching a logical session in an information processing system having a network control system configuration in which a plurality of terminal devices are connected to a plurality of processing units via at least one communication control processer. The communication control processor includes storage area for storing histories of command data transactions corresponding to the respective terminal devices, and retrieves the histories of command data transactions of the terminal devices connected logically to a processing unit to be replaced when switching from the processing unit to be replaced to another central processing unit is performed, delivers to the processing unit to be replaced command data to disconnect logical connective relationship from the processing unit to be replaced, and establishes logical connective relationship to the replacing processing unit, and for automatically delivering the retrieved histories of the command data transactions to the replacing processing unit.
-
Citations
17 Claims
-
1. A control apparatus for dynamically switching a logical session in an information processing system in which a plurality of terminal devices are connected to a plurality of processing units via at least one communication control processor, each of the processing units executes one or a plurality of programs each of which can be used by any one of the terminal devices, the communication control processor comprising:
-
first storage means for storing histories of command data transactions corresponding to the respective terminal devices; second storage means for storing first identification data on the processing units connected to the respective terminal devices, second identification data indicative of whether the respective processing units are usable or unusable, and third identification data identifying replacing one of the processing units which can replace the respective processing units; and first control means for identifying on the basis of the first identification data, when the second identification data indicates that a processing unit is unusable, a terminal device that is logically connected to the processing unit and has used one of the programs having been executed by the processing unit among the plural programs executed by the processing units, for retrieving from the first storage means histories of command data transactions of the identified terminal device, for automatically creating a first command message to disconnect the logical connection between the processing unit and the identified terminal device, for delivering the first command message to the processing unit, for automatically establishing a logical connection between a replacing processing unit replacing the processing unit and the identified terminal device on the basis of the third identification data stored in the second storage means, for automatically creating a second command message for allowing the identified terminal device to be used continuously on the basis of the previously retrieved histories of command data transactions and delivering the second command message to the replacing processing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A control method for dynamically switching a logical session in an information processing system having a network control system structure comprising a plurality of processing units, a plurality of terminal devices, and at least one communication control processor which connects the plurality of terminal devices to the plurality of processing units, the communication control processor including first storage means for storing histories of command data transactions corresponding to the respective terminal devices and second storage means for storing first identification data on the processing units connected to the respective terminal devices, second identification data indicative of whether the respective processing units are usable or unusable, and third identification data identifying replacing ones of the processing units which can replace the respective processing units, the method comprising the steps of:
-
identifying on the basis of the first identification data, when the second identification data indicates that a processing unit is unusable, a terminal device that is logically connected to the processing unit and has used by one of the programs having been executed by the processing units among the plural programs executed by the processing units; retrieving from the first storage means histories of command data transactions of the identified terminal device; automatically creating a first command message to disconnect the logical connection between the processing unit and the identified terminal device and delivering the first command message to the processing unit; automatically establishing a logical connection between a replacing processing unit replacing the processing unit and the identified terminal device on the basis of the third identification data stored in the second storage means; and automatically creating a second command message for allowing the identified terminal device to be used continuously on the basis of the previously retrieved histories of command data transactions and delivering the second command message to the replacing processing unit. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
-
17. A control apparatus for dynamically switching a logical session in an information processing system having a network control system configuration in which a plurality of terminal devices are connected to a plurality of processing units via at least one communication control processor, the communication control processor comprising:
-
storage means for storing histories of command data transactions corresponding to the respective terminal devices; and control means for identifying, when a processing unit is unusable, a terminal device that is logically connected to the processing unit and has used any one of programs having been executed by the processing unit among plural programs executed by the processing units, for retrieving the histories of command data transactions of the identified terminal device, the processing unit being a processing unit to be replaced by a replacing processing unit, for delivering to the processing unit to be replaced command data to disconnect the logical connection between the processing unit to be replaced and the identified terminal device, for establishing logical connection between the replacing processing unit and the identified terminal device, and for automatically delivering the retrieved histories of the command data transactions to the replacing processing unit.
-
Specification