Method and apparatus for allocating server access in a distributed computing environment

• US 5,452,459 A
• Filed: 01/08/1993
• Issued: 09/19/1995
• Est. Priority Date: 01/08/1993
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Digital Equipment Corporation (HP Inc.)
• Inventors: Drury, William B., Hsu, Yun-Ping
• Primary Examiner(s): Kriess, Kevin A.
• Assistant Examiner(s): BUTLER, DENNIS
• Application Number:
  US08/002,197
• Time in Patent Office: 984 Days
• Field of Search: 395/600, 395/650, 395/700
• US Class Current: 1/1
• CPC Class Codes: G06F 9/4843 by program, e.g. task dispatcher, supervisor, operating system
• CPC Class Codes: G06F 9/547 Remote procedure calls [RPC]; Web services

Abstract

In a distributed computing environment (DCE), a scheduler process executes on every DCE processor. The schedulers mediate all remote procedure calls (RPCs) made by client processes to server processes using a scheduler and/or namespace accessible by the DCE processor. The scheduler database stores interfaces of single-thread servers, and the namespace stores interfaces of multi-thread servers. The scheduler, in response to receiving an identity of an interface from a client process searching the scheduler database and namespace to locate the interface. Upon locating the interface, the interface is provided to the client process so that client and server processes can be bound.

Claims

1. In a network of processors and a memory connected to each other by a communications bus, the processors to execute processes and each processor executing a scheduler, the processes including clients and servers, each server including an interface having an identity, the servers including single-thread servers and multi-thread servers, a method for binding a client to a server comprising:

registering the interfaces of the single-thread servers in a scheduler database of the memory;

registering the interfaces of the multi-thread servers in a namespace of the memory;

providing, by a client executing on a client processor, an identity of an interface to a scheduler, the scheduler executing on the client processor;

searching, by the scheduler, the scheduler database using the identity to locate the interface of a single-thread server, and if the interface is not located in the scheduler database, then searching the namespace to locate the interface of a multi-thread server; and

providing, if the interface was located in the schedular database and if the single-thread server is available and otherwise if the interface was located in the namespace, the interface to the client to bind the client to the server.

2. The method of claim 1 wherein the memory includes a context database, and further comprising:

in response to providing the interface to the client, storing information related to the client, the server, and the interface in a context database of the memory;

providing, subsequent to the storing the information in the context database, the identity to the scheduler;

searching, by the scheduler, the context database for the information related to the client, the server, and the interface, to locate the interface; and

providing the interface to the client from the context database.

3. The method of claim 2 wherein the context database is located in a portion of the memory which is allocated to the scheduler.

4. The method of claim 1 further comprising:

queuing, if the interface was not located in the namespace, the identity of the interface.

5. The method of claim 1 further comprising:

releasing, by the scheduler, the single-threaded interface in response to a completion notification by the client.