@InCollection{baylor:workload-book, author = {Sandra Johnson Baylor and C. Eric Wu}, title = {Parallel {I/O} Workload Characteristics Using {Vesta}}, booktitle = {Input/Output in Parallel and Distributed Computer Systems}, chapter = {7}, editor = {Ravi Jain and John Werth and James C. Browne}, crossref = {iopads-book}, year = {1996}, series = {The Kluwer International Series in Engineering and Computer Science}, volume = {362}, pages = {167--185}, publisher = {Kluwer Academic Publishers}, earlier = {baylor:workload}, keywords = {parallel I/O, file access pattern, workload characterization, file system workload, pario-bib}, abstract = {To develop optimal parallel I/O subsystems, one must have a thorough understanding of the workload characteristics of parallel I/O and its exploitation of the associated parallel file system. Presented are the results of a study conducted to analyze the parallel I/O workloads of several applications on a parallel processor using the Vesta parallel file system. Traces of the applications are obtained to collect system events, communication events, and parallel I/O events. The traces are then analyzed to determine workload characteristics. The results show I/O request rates on the order of hundreds of requests per second, a large majority of requests are for small amounts of data (less than 1500 bytes), a few requests are for large amounts of data (on the order of megabytes), significant file sharing among processes within a job, and strong temporal, traditional spatial, and interprocess spatial locality.}, comment = {Part of a whole book on parallel I/O; see iopads-book.} }