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System of assigning work requests based on classifying into an eligible class where the criteria is goal oriented and capacity information is available

Patent 5603029 Issued on February 11, 1997. Estimated Expiration Date: Icon_subject June 7, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Method for distributing resources in a time-shared system
Patent #: 4481583
Issued on: 11/06/1984
Inventor: Mueller

Multiprocessor system and a method of load balancing thereof
Patent #: 5241677
Issued on: 08/31/1993
Inventor: Naganuma, et al.

Broker for computer network server selection
Patent #: 5341477
Issued on: 08/23/1994
Inventor: Pitkin, et al.

Apparatus and method for managing a server workload according to client performance goals in a client/server data processing system Patent #: 5537542
Issued on: 07/16/1996
Inventor: Eilert, et al.

Inventors

Application

No. 476157 filed on 06/07/1995

US Classes:

718/105, Load balancing707/200, FILE OR DATABASE MAINTENANCE710/39Access request queuing

Examiners

Primary: Lee, Thomas C.
Assistant: Chen, Anderson I.

Attorney, Agent or Firm

International Class

G06F 015/06

Abstract

Apparatus and accompanying methods for use preferably in a multi-system shared data (sysplex) environment (100), wherein each system (110) provides one or more servers (115), for dynamically and adaptively assigning and balancing new work and for new session requests, among the servers in the sysplex, in view of attendant user-defined business importance of these requests and available sysplex resource capacity so as to meet overall business goals. Specifically, systems and servers are categorized into two classes: eligible, i.e., goal-oriented servers running under a policy and for which capacity information is currently available, and candidate, i.e., servers which lack capacity information. Work requests for a client application are assigned first to various eligible systems and eligible servers thereon based on their current capacity to accept new work and in a manner that meets business goals inherent in a sysplex policy; followed, if additional servers are requested by that application, to candidate systems and candidate servers thereon. As to session placement, first those system(s) are selected that have lowest utilization, at a target importance level, but with sufficient available capacity at that level. Competing servers on the selected system(s) are then evaluated based on their corresponding session count data to yield a single resulting server. Thereafter, identification of multiple servers and their corresponding weights are returned to, e.g., a client application, for eventual routing of work requests to those servers, or the identification of a single server is returned to that application for establishing a new session therewith.

Other References

  • D. Sitaram et al, Issues in the . . . Load Skew, Parallel and Distributed Information Systems, pp. 214-223 1993
  • Lin et al., "A Dynamic Load Balancing Policy with a Central Job Dispatcher (LBC)", Proceedings of the Eleventh International Conference on Distributed Computing Systems, Arlington, Texas, 20-24 May 1991, pp. 264-271
  • Geise, "Dynamic Load Balancing in a Cluster of Loosely Coupled Systems", IBM Technical Disclosure Bulletin, vol. 37, No. 7, Jul. 1994, pp. 243-244
  • Herrin II, et al., "The Benefits of Service Rebalancing", Proceedings of the Third Workship on Workstation Operating Systems, Key Biscayne, FL, 23-24 Apr. 1992, pp. 104-110
  • Menditto et al., "Single System Image And Load Balancing For Network Access To A Loosely Coupled Complex", IBM Technical Disclosure Bulletin, vol. 34, No. 9, Feb. 1992, pp. 464-27
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