{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/72078"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/72078","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Disk I/O in High-Performance Computing Systems","abstract":"There exists an increasing disparity between the performance of high-performance computers and disk I/O systems. This divergence in performance signifies that the I/O system will become an increasing bottleneck in future computer systems. With such a bottleneck, a program's execution time on these systems could approach the associated file access time in the limiting case. We review the evolution of I/O architectures and characterize the access patterns of requests to those I/O systems. We apply this information to investigate the I/O performance of a multiple disk system in a multiprocessor system.","abstract_html":"There exists an increasing disparity between the performance of high-performance computers and disk I/O systems. This divergence in performance signifies that the I/O system will become an increasing bottleneck in future computer systems. With such a bottleneck, a program's execution time on these systems could approach the associated file access time in the limiting case. We review the evolution of I/O architectures and characterize the access patterns of requests to those I/O systems. We apply this information to investigate the I/O performance of a multiple disk system in a multiprocessor system.","abstract_has_math":false,"creators":["Jensen, David Wayne"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Computer Science","degree_department":null,"school":null,"contributors":["Reed, Daniel"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-17T20:00:35Z","date_published":"2014-12-17T20:00:35Z","updated_at":"2026-07-22T22:26:06Z","subjects":["Engineering, Electronics and Electrical","Computer Science"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI9314887"],"render_values":[{"text":"(UMI)AAI9314887","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/72078","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Reed, Daniel"]},{"key":"dc:creator","label":"Author","values":["Jensen, David Wayne"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-17T20:00:35Z","10000-01-01","1993"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Computer Science"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Electronics and Electrical","Computer Science"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/72078","(UMI)AAI9314887"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["There exists an increasing disparity between the performance of high-performance computers and disk I/O systems. This divergence in performance signifies that the I/O system will become an increasing bottleneck in future computer systems. With such a bottleneck, a program's execution time on these systems could approach the associated file access time in the limiting case. We review the evolution of I/O architectures and characterize the access patterns of requests to those I/O systems. We apply this information to investigate the I/O performance of a multiple disk system in a multiprocessor system.","Today's disk subsystems typically provide good I/O performance for only sequential access. Our study uses a simulated multiprocessor and multiple disk system architecture. I/O and memory traffic is combined in the system's packet-switched, multistage interconnection network. Our investigation first considers the effects of the I/O traffic on memory access in the multistage network. We then use a set of synthetic access patterns to evaluate the potential I/O performance. We consider the effectiveness of using custom mappings of file data to disks to support non-sequential I/O in this multiprocessor system. Not only do we investigate the more traditional workload of multiple processors accessing separate files, we also study the I/O characteristics of multiple processors accessing a single file.","Our experiments show the I/O access pattern, the data placement on disks, the number of disks, and the I/O request rate, all interact to determine the performance of such a multiple disk I/O system. We found no single data placement on the multiple disks can provide good I/O performance for all workload cases. Similarly, a different set of data placement guidelines were identified for multiple processors accessing a single file than those identified for the more conventional access of multiple files.","Made available in DSpace on 2014-12-17T20:00:35Z (GMT). No. of bitstreams: 1 9314887.pdf: 13727436 bytes, checksum: 56dbe0610d3a246c772f2eb065d853f8 (MD5) Previous issue date: 1993","Embargo set by: Seth Robbins for item 72246 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","257 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1993."]},{"key":"dc:title","label":"Title","values":["Disk I/O in High-Performance Computing Systems"]}]}],"canonical_facts":{"dc:contributor":["Reed, Daniel"],"dc:creator":["Jensen, David Wayne"],"dc:date":["2014-12-17T20:00:35Z","10000-01-01","1993"],"dc:description":["There exists an increasing disparity between the performance of high-performance computers and disk I/O systems. This divergence in performance signifies that the I/O system will become an increasing bottleneck in future computer systems. With such a bottleneck, a program's execution time on these systems could approach the associated file access time in the limiting case. We review the evolution of I/O architectures and characterize the access patterns of requests to those I/O systems. We apply this information to investigate the I/O performance of a multiple disk system in a multiprocessor system.","Today's disk subsystems typically provide good I/O performance for only sequential access. Our study uses a simulated multiprocessor and multiple disk system architecture. I/O and memory traffic is combined in the system's packet-switched, multistage interconnection network. Our investigation first considers the effects of the I/O traffic on memory access in the multistage network. We then use a set of synthetic access patterns to evaluate the potential I/O performance. We consider the effectiveness of using custom mappings of file data to disks to support non-sequential I/O in this multiprocessor system. Not only do we investigate the more traditional workload of multiple processors accessing separate files, we also study the I/O characteristics of multiple processors accessing a single file.","Our experiments show the I/O access pattern, the data placement on disks, the number of disks, and the I/O request rate, all interact to determine the performance of such a multiple disk I/O system. We found no single data placement on the multiple disks can provide good I/O performance for all workload cases. Similarly, a different set of data placement guidelines were identified for multiple processors accessing a single file than those identified for the more conventional access of multiple files.","Made available in DSpace on 2014-12-17T20:00:35Z (GMT). No. of bitstreams: 1 9314887.pdf: 13727436 bytes, checksum: 56dbe0610d3a246c772f2eb065d853f8 (MD5) Previous issue date: 1993","Embargo set by: Seth Robbins for item 72246 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","257 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1993."],"dc:identifier":["http://hdl.handle.net/2142/72078","(UMI)AAI9314887"],"dc:subject":["Engineering, Electronics and Electrical","Computer Science"],"dc:title":["Disk I/O in High-Performance Computing Systems"],"dc:type":["text"],"thesis:degree_discipline":["Computer Science"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:06Z"}