An improvement of I/O function for auxiliary storage: parallel I/O for a large scale supercomputing
Authors: 
Umpei Nagashima, Fumio Nishimoto, Takashi Shibata, Hiroshi Itoh, Minoru GotohAuthors Info & Claims
Pages 48 - 59
Abstract
New I/O technique for external auxiliary storage: magnetic disk unit, has been developed to improve the I/O performance on HITAC VOS3/ES1 with usual hardware architecture. Since the I/O technique is based on the idea that the sequence of I/O processes should be divided to some groups and be executed in parallel, and is quite similar to a pipeline on vector computer, we call it Parallel I/O (PIO).
The PIO function has been realized and opened to end-users without any change to previous protocols.
Comparison of actual performance of PIO with 16 degrees of parallelization (16 PIO), the speed of the PIO is about 26 times faster than the standard (sequential) I/O technique by using chained schedule function. In the case of 8 PIO, PIO is 13 times faster than the standard I/O technique. The efficiency of PIO correlates well with the degree of parallelization. Elapsed time is inversely proportional to the degree of parallelization. The change of acceleration ratio of PIO to the standard I/O is normally proportional to the degree of parallelization.
The PIO is quite efficient for large scale supercomputing because I/O between external auxiliary storage and CPU is indispensable in large scale computations. Since the performance of I/O has not been improved, while the performance of supercomputer has made remarkable progress in CPU speed, I/O speed may become bottleneck for computations with supercomputers.
References
[1]
HITAC: Reference manual of VOSS/HAP/ES, 1990, Form 8090- 5-690- 60, pp. 8
[2]
HITAC: Reference manual of Semiconductor memory unit and its controlle unit, 1989, Form 8080-2-III
[3]
HITAC: VOSS/ES overview, 1986, Form 8091-5-001
[4]
IBM: OS/VS2 MVS overview, 1980, Form GC28-0984-0
[5]
HITAC: Reference manual of VOSS/ES SAMH E2, 1989, Form 8091-5- 083, pp.5-18
[6]
We are not sure the actual reference about the chained schedule function in IBM OS/VS2 MVS system.
Index Terms
- An improvement of I/O function for auxiliary storage: parallel I/O for a large scale supercomputing
Recommendations
An improvement of I/O function for auxiliary storage: parallel I/O for a large scale supercomputing
ICS '90: Proceedings of the 4th international conference on SupercomputingNew I/O technique for external auxiliary storage: magnetic disk unit, has been developed to improve the I/O performance on HITAC VOS3/ES1 with usual hardware architecture. Since the I/O technique is based on the idea that the sequence of I/O processes ...
The Effect of Artificial Neural Network Model Combined with Six Tumor Markers in Auxiliary Diagnosis of Lung Cancer
To evaluate the diagnosis potential of artificial neural network (ANN) model combined with six tumor markers in auxiliary diagnosis of lung cancer, to differentiate lung cancer from lung benign disease, normal control, and gastrointestinal cancers. ...
MPI windows on storage for HPC applications
EuroMPI '17: Proceedings of the 24th European MPI Users' Group MeetingUpcoming HPC clusters will feature hybrid memories and storage devices per compute node. In this work, we propose to use the MPI one-sided communication model and MPI windows as unique interface for programming memory and storage. We describe the design ...
Comments
Please enable JavaScript to view thecomments powered by Disqus.Information & Contributors
Information
Published In
Sept. 1990
489 pages
Copyright © 1990 ACM.
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]
Publisher
Association for Computing Machinery
New York, NY, United States
Publication History
Published: 01 June 1990
Published in SIGARCH Volume 18, Issue 3b
Check for updates
Qualifiers
- Article
Contributors
Other Metrics
Bibliometrics & Citations
Bibliometrics
Article Metrics
- 0Total Citations
- 286Total Downloads
- Downloads (Last 12 months)52
- Downloads (Last 6 weeks)10
Reflects downloads up to 10 Dec 2024
Other Metrics
Citations
View Options
Login options
Check if you have access through your login credentials or your institution to get full access on this article.
Sign in