TY - GEN
T1 - Optimizing I/O for petascale seismic simulations on unstructured meshes
AU - Rettenberger, Sebastian
AU - Bader, Michael
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/10/26
Y1 - 2015/10/26
N2 - SeisSol simulates earthquake dynamics by coupling seismic wave propagation and dynamic rupture simulations with high order accuracy on fully adaptive, unstructured meshes. In this paper we present an optimization of SeisSol's I/O implementations to establish a workflow that supports petascale simulations on large unstructured datasets. Our implementations can handle meshes with more than 1 billion cells and 660 billion degrees of reedom. The results show that SeisSol can initialize the mesh structure within 35 seconds on 2048 SuperMUC nodes from our new optimized mesh format. For the wave field output we implemented carefully tuned I/O routines based on HDF5 and MPI-IO. With an aggregation strategy we are able to increase the write bandwidth from 832 MiB/s to 6.7 GiB/s on 2048 SuperMUC nodes.
AB - SeisSol simulates earthquake dynamics by coupling seismic wave propagation and dynamic rupture simulations with high order accuracy on fully adaptive, unstructured meshes. In this paper we present an optimization of SeisSol's I/O implementations to establish a workflow that supports petascale simulations on large unstructured datasets. Our implementations can handle meshes with more than 1 billion cells and 660 billion degrees of reedom. The results show that SeisSol can initialize the mesh structure within 35 seconds on 2048 SuperMUC nodes from our new optimized mesh format. For the wave field output we implemented carefully tuned I/O routines based on HDF5 and MPI-IO. With an aggregation strategy we are able to increase the write bandwidth from 832 MiB/s to 6.7 GiB/s on 2048 SuperMUC nodes.
KW - Earthquake simulations
KW - HDF5
KW - Parallel I/O
KW - Petascale supercomputers
KW - SeisSol
KW - Unstructured meshes
UR - https://www.scopus.com/pages/publications/84959281836
U2 - 10.1109/CLUSTER.2015.51
DO - 10.1109/CLUSTER.2015.51
M3 - Conference contribution
AN - SCOPUS:84959281836
T3 - Proceedings - IEEE International Conference on Cluster Computing, ICCC
SP - 314
EP - 317
BT - Proceedings - 2015 IEEE International Conference on Cluster Computing, CLUSTER 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - IEEE International Conference on Cluster Computing, CLUSTER 2015
Y2 - 8 September 2015 through 11 September 2015
ER -