Tuning a computer system effectively requires prior studies on the performance of the system. There are different types of tools available to measure a system: hardware, firmware and software. This thesis presents the design and implementation of an event monitor, which is one type of software tools. The event monitor was developed on a SUN1 workstation running UNIX 4.2bsd version 1.4. Six types of events were selected to be measured, namely transactions, logins/logouts, pageins, pageouts, disk I/Os and forks/exits. The operating system was modified to include probes to trap these events. For a final testing of the event monitor, it was ported and installed onto a SUN3 workstation running UNIX 4.2bsd version 3.2. Measurements collected were analyzed by a capacity planning package condenser. The results give an indication of the system workload and the system performance. Benchmarks were also set up to measure the overhead incurred by the event monitor. / Science, Faculty of / Computer Science, Department of / Graduate

A performance experiment on a PDP 11/45 running under UNIX is described. The purpose is to discover the major influences in the system and their relationships in an attempt to analyze the performance of the system and predict the effect on performance of possible hardware and workload changes. A suitable performance parameter is developed and the workload, hardware and internal system parameters are determined. Tools are constructed to record these parameters. A controlled experiment, using a synthetic workload is then conducted. The results are analyzed using regression analysis and suitable equations are obtained. Sample applications are given. The merits of the relationships, as well as the suitability of the tools developed and methods used, are discussed. / Science, Faculty of / Computer Science, Department of / Graduate

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Thesis (M.S.)--Rochester Institute of Technology, 1986. / Typescript. Includes bibliographical references (leaves 71-72).

Different computer systems have their own ways of representing, storing and managing files. One approach to facilitate file transfers among systems in a heterogeneous networked environment is for each system to locally map files for transfer onto a virtual filestore (VFS). Conceptually, a virtual filestore provides a universal model for describing files and how they can be manipulated. The ISO File Transfer, Access and Management (FTAM) protocol offers one such virtual filestore model. This thesis reports on the prototype implementation of a useful subset of the ISO FTAM protocol for the UNIX 4.2 BSD¹ file system. We call this implementation ubcFTAM. UNIX files, ordinarily regarded as unstructured, can be endowed with some internal structure thereby allowing the transfer of selective portions of a file. Furthermore, the implementation offers several file attributes not supported by UNIX. ubcFTAM runs on several Sun Workstations² interconnected by a 10 Mbps Ethernet. Some performance data of ubcFTAM are also presented. This thesis also identifies several aspects of the specifications that are ambiguous or that are inadequate, warranting further studies. Resolutions for these issues are discussed. We hope this experience will be useful to others planning to implement FTAM for UNIX systems. ¹UNIX is a registered trademark of American Telephone and Telegraph Bell Laboratories. BSD denotes Berkeley Standard Distribution ²SUN Workstation is a trademark of Sun Microsystems, Inc. / Science, Faculty of / Computer Science, Department of / Graduate

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Typescript (photocopy). / Digitized by Kansas Correctional Industries / Department: Computer Science.