Paper Info
Title
Noncontiguous I/O Accesses Through MPI-IO
Abstract
I/O performance remains a weakness of parallel computingsystems today. While this weakness is partly attributedto rapid advances in other system components, I/Ointerfaces available to programmers and the I/O methodssupported by file systems have traditionally not matchedefficiently with the types of I/O operations that scientific applicationsperform, particularly noncontiguous accesses.The MPI-IO interface allows for rich descriptions of theI/O patterns desired for scientific applications and implementationssuch as ROMIO have taken advantage of thisability while remaining limited by underlying file systemmethods.A method of noncontiguous data access, list I/O, wasrecently implemented in the Parallel Virtual File System(PVFS). We implement support for this interface in theROMIO MPI-IO implementation. Through a suite of non-contiguousI/O tests we compared ROMIO list I/O to currentmethods of ROMIO noncontiguous access and foundthat the list I/O interface provides performance benefits inmany noncontiguous cases.
Year
DOI
Venue
2003
10.1109/CCGRID.2003.1199358
CCGrid
Keywords
Field
DocType
o performance,o accesses,o operation,mpi-io interface,noncontiguous case,romio noncontiguous access,o pattern,romio list,noncontiguous access,o interface,noncontiguous data access,parallel processing,mathematics,testing,computer science,distributed computing,message passing,data access
Virtual file system,File system,Suite,Computer science,Parallel processing,Parallel computing,Input/output,Programming profession,Data access,Operating system,Message passing,Distributed computing
Conference
ISBN
Citations 
PageRank 
0-7695-1919-9
48
2.72
References 
Authors
12
6
Name
Order
Citations
PageRank
Avery Ching122116.21
Alok N. Choudhary23441326.32
Kenin Coloma31379.36
Wei-keng Liao4109587.98
Robert Ross52717173.13
William D. Gropp65547548.31