NDLI: The process-flow model: examining I/O performance from the system's point of view

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The process-flow model: examining I/O performance from the system's point of view

Content Provider	ACM Digital Library
Author	Ganger, Gregory R. Patt, Yale N.
Abstract	Input/output subsystem performance is currently receiving considerable research attention. Significant effort has been focused on reducing average I/O response times and increasing throughput for a given workload. This work has resulted in tremendous advances in I/O subsystem performance. It is unclear, however, how these improvements will be reflected in overall system performance. The central problem lies in the fact that the current method of study tends to treat all I/O requests aa equally important. We introduce a three class taxonomy of I/O requests based on their effects on system performance. We denote the three classes time-critical, time-limited, and time-noncritical. A system-level, trace-driven simulation model has been developed for the purpose of studying disk scheduling algorithms. By incorporating knowledge of I/O classes, algorithms tuned for system performance rather than I/O subsystem performance may be developed. Traditional I/O subsystem simulators would rate such algorithms unfavorably because they produce suboptimal subsystem performance. By studying the I/O subsystem via global, system-level simulation, one can more easily identify changes that will improve overall system performance.
Starting Page	86
Ending Page	97
Page Count	12
File Format	PDF
ISBN	0897915801
DOI	10.1145/166955.166989
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1993-06-01
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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