G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 9/44 (2006.01) G06F 9/46 (2006.01)
Patent
CA 2171683
A number of methods and apparatus for managing clients of a computer server. In particular, the usher implements an orderly and predictable server deactivation and/or shut down strategy in generally the following manner. The usher continuously maintains a transaction counter indicative of the number of clients actively utilizing services. For example, the usher may increment the transaction counter when a service is requested and then decrement the transaction counter when a service is completed or terminated. However, at some point in the server operation, the usher may receive a lock up request. This may occur because a client has invoked a deactivation and/or shut down operation, or the server may decide to shut down itself. In any event, upon receiving the lock up request, the usher will not perform any new client requests. Thus the usher controls the accessibility of the server to external clients by preventing new client requests for service in preparation for shut down. Nevertheless, the usher utilizes a gentle strategy and only eliminates clients through attrition. Hence the usher implements a shut down strategy which, while not accepting new client requests, will complete any services active at the time deactivation and/or shut down was requested. In some embodiments of the present invention, an usher is an internal component of or is used by a server such as a computer process, a computer service, or a target object.
Smart & Biggar
Sun Microsystems Inc.
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