ATLAS I/O performance optimization in as-deployed environments
T. Maier, Douglas Benjamin, W. Bhimji, J. Elmsheuser, P. van Gemmeren, D. Malon, N. Krumnack · Journal of Physics Conference Series · 2015
This paper provides an overview of an integrated program of work underway within the ATLAS experiment to optimise I/O performance for large-scale physics data analysis in a range of deployment environments. It proceeds to examine in greater detail one component of that work, the tuning of job-level I/O parameters in response to changes to the ATLAS event data model, and considers the implications of such tuning for a number of measures of I/O performance.