Title :
Dynamic I/O characterization of I/O intensive scientific applications
Author :
Pasquale, Barbara K. ; Polyzos, George C.
Author_Institution :
Dept. of Comput. Sci. & Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
Understanding the characteristic I/O behavior of scientific applications is an integral part of the research and development efforts for the improvement of high performance I/O systems. This study focuses on application level I/O behavior with respect to both static and dynamic characteristics. We observed the San Diego Supercomputer Center´s Cray C90 workload and isolated the most I/O intensive applications. The combination of a low-level description of physical resource usage and the high-level functional composition of applications and scientific disciplines for this set reveals the major sources of I/O demand in the workload. We selected two applications from the I/O intensive set and performed a detailed analysis of their dynamic I/O behavior. These applications exhibited a high degree of regularity in their I/O activity over time and their characteristic I/O behaviors can be precisely described by one and two, respectively, recurring sequences of data accesses and computation periods
Keywords :
Cray computers; input-output programs; natural sciences computing; performance evaluation; Cray C90; I/O characterization; I/O intensive applications; I/O intensive scientific applications; San Diego Supercomputer Center; data access; dynamic I/O behavior; high performance I/O systems; input output behavior; physical resource usage; Application software; Computer applications; Computer science; File systems; Laboratories; Multiprocessor interconnection networks; Operating systems; Performance analysis; Research and development; Supercomputers;
Conference_Titel :
Supercomputing '94., Proceedings
Conference_Location :
Washington, DC
Print_ISBN :
0-8186-6605-6
DOI :
10.1109/SUPERC.1994.344330
