TY - GEN
T1 - Memory-conscious collective I/O for extreme-scale HPC systems
AU - Lu, Yin
AU - Chen, Yong
AU - Thakur, Rajeev
AU - Zhuang, Yu
PY - 2012
Y1 - 2012
N2 - The continuing decrease in memory capacity per core and the increasing disparity between core count and off-chip memory bandwidth create significant challenges for I/O operations in exascale systems. The exascale challenges require rethinking collective I/O for the effective exploitation of the correlation among I/O accesses in the exascale system. In this study, considering the major constraint of the memory space, we introduce a Memory-Conscious collective I/O. Given the importance of I/O aggregator in improving the performance of collective I/O, the new collective I/O strategy restricts aggregation data traffic within disjointed subgroups, coordinates I/O accesses in intra-node and inter-node layer and determines I/O aggregators at run time considering data distribution and memory consumption among processes. The preliminary results have demonstrated that the new collective I/O strategy holds promise in substantially reducing the amount of memory pressure, alleviating contention for memory bandwidth and improving the I/O performance for extreme-scale systems.
AB - The continuing decrease in memory capacity per core and the increasing disparity between core count and off-chip memory bandwidth create significant challenges for I/O operations in exascale systems. The exascale challenges require rethinking collective I/O for the effective exploitation of the correlation among I/O accesses in the exascale system. In this study, considering the major constraint of the memory space, we introduce a Memory-Conscious collective I/O. Given the importance of I/O aggregator in improving the performance of collective I/O, the new collective I/O strategy restricts aggregation data traffic within disjointed subgroups, coordinates I/O accesses in intra-node and inter-node layer and determines I/O aggregators at run time considering data distribution and memory consumption among processes. The preliminary results have demonstrated that the new collective I/O strategy holds promise in substantially reducing the amount of memory pressure, alleviating contention for memory bandwidth and improving the I/O performance for extreme-scale systems.
UR - http://www.scopus.com/inward/record.url?scp=84876583449&partnerID=8YFLogxK
U2 - 10.1109/SC.Companion.2012.189
DO - 10.1109/SC.Companion.2012.189
M3 - Conference contribution
AN - SCOPUS:84876583449
SN - 9780769549569
T3 - Proceedings - 2012 SC Companion: High Performance Computing, Networking Storage and Analysis, SCC 2012
SP - 1360
EP - 1362
BT - Proceedings - 2012 SC Companion
T2 - 2012 SC Companion: High Performance Computing, Networking Storage and Analysis, SCC 2012
Y2 - 10 November 2012 through 16 November 2012
ER -