RTM High Performance I/O Considerations

RTM was proven to be an industrial-strength application that is crucial in seismic imaging. However, it is a resource-consuming application that demands a high I/O performance. Moreover, HPC platforms are changing and the I/O structure of those systems evolve. This encourage RTM developers to take into account underlying I/O architecture in order to maximize its efficiency and hence RTM performance. Among the considerations are the kind of global and local file systems, the size of the system transfers and buffers, and the directory locking policy and data distribution. How to set those parameters are a main concern if high performance I/O has to be extracted from modern HPC systems.