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Dr Neil J Gunther is a recognized expert on performance management and capacity planning He founded Performance Dynamics Company in 1994 and has provided consulting services to a long list of important clients such as Federal Express Tandem Computers eBaycom and Sun Microsystems 1 Dr Gunther provides training courses in distributed systems performance management and capacity planning He lectures worldwide has taught performance analysis courses at UCLA and Stanford University and has written over 100 articles on computer performance analysis Dr Gunther was awarded Best Technical Paper at the Computer Measurement Group CMG Conference in 1996 He is a member of the Association for Computing Machinery ACM American Mathematical Society AMS CMG Institute of Electrical and Electronics Engineers IEEE and the Advanced Computing Systems Association USENIX In 1999 at the CMG Conference in Reno Nevada Dr Gunther presented a paper entitled Solaris System Resource Manager All I Ever Wanted Was My Unfair Advantage And Why You Cant Get It 2 The paper discusses modifications to the UNIX system scheduler that allocates fair shares of system resources to users and groups This review summarizes the ideas illustrated in Dr Gunthers paper compares them to alternate methods and presents opinions The traditional UNIX time-share TS schedulers have implemented a round-robin algorithm While this algorithm ensures responsiveness to multiple interactive users it favors users that run many jobs with short CPU usage The Solaris System Resource Manager SRM is a software tool that enables the allocation and control of major system resources such as CPU physical memory virtual memory and number of processes 3 The system administrator can allocate CPU resources according to predefined shares as opposed to fixed percentages which allows the system to dynamically apportion all available resources according to the relative proportion of shares of any current user The SRM pro rates resource shares to users and groups and then adjusts CPU usage to meet the shares Dr Gunther presents two significant differences between the
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