Current Search: Computer storage devices (x)
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Title
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Storage subsystem workload characterization and synthesis.
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Creator
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Ali, Ahmad A. J., Florida Atlantic University, Mahgoub, Imad
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Abstract/Description
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In this study, a tool has been developed which traces the storage subsystem workload at the subsystem level. Due to hardware assistance, this tool has very little overhead. This is achieved by incorporating the tracing routine in the microcode of the IBM SCSI adapter. The I/O traces are collected, in realtime, on a PS/2 connected to the modified SCSI adapter via an asynchronous link. These traces are then processed and studied. We have developed a scheme to characterize the workload by...
Show moreIn this study, a tool has been developed which traces the storage subsystem workload at the subsystem level. Due to hardware assistance, this tool has very little overhead. This is achieved by incorporating the tracing routine in the microcode of the IBM SCSI adapter. The I/O traces are collected, in realtime, on a PS/2 connected to the modified SCSI adapter via an asynchronous link. These traces are then processed and studied. We have developed a scheme to characterize the workload by studying the parameters of the traced workload. These parameters include LBA distributions, interarrival time distribution, size distributions, ratios between read requests and write requests, adapter's cache performance, etc. In this study, workload characterization of storage subsystems in OS/2, AIX and NetWare environments was performed. An algorithm for synthesizing of the workload was also developed and implemented as part of this study.
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Date Issued
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1995
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PURL
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http://purl.flvc.org/fcla/dt/15227
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Subject Headings
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Computer networks--Workload, System design, Computer storage devices
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Format
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Document (PDF)
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Title
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Disk I/O scheduling techniques for multimedia systems.
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Creator
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Sommers, Daniel R., Florida Atlantic University, Furht, Borko, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
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Abstract/Description
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The home computer user represents a significant portion of the multimedia market. To the home user, multimedia is the ability to play, edit and even create movies (video and sound) on his home computer system. While there are many studies that concentrate on large multimedia servers which support hundreds (even thousands) of simultaneous users, there are very few that focus attention on the home computer configuration. This thesis presents the mechanisms for generating, compressing,...
Show moreThe home computer user represents a significant portion of the multimedia market. To the home user, multimedia is the ability to play, edit and even create movies (video and sound) on his home computer system. While there are many studies that concentrate on large multimedia servers which support hundreds (even thousands) of simultaneous users, there are very few that focus attention on the home computer configuration. This thesis presents the mechanisms for generating, compressing, transmitting and decompressing multimedia data as a framework for the long-term storage and retrieval of multimedia data on disk drives. After developing the framework, the thesis presents an in-depth design and analysis of a disk-based multimedia storage system, proposes a scheduling algorithm for data retrieval (DAN-SCAN) and presents the results of a simulation of the algorithm.
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Date Issued
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1996
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PURL
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http://purl.flvc.org/fcla/dt/15235
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Subject Headings
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Multimedia systems, Disk access (Computer science), Computer storage devices, Data disk drives
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Format
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Document (PDF)