Characterizing output bottlenecks in a supercomputer

  title={Characterizing output bottlenecks in a supercomputer},
  author={Bing Xie and Jeffrey S. Chase and David Dillow and Oleg Drokin and Scott Klasky and Sarp Oral and Norbert Podhorszki},
  journal={2012 International Conference for High Performance Computing, Networking, Storage and Analysis},
Supercomputer I/O loads are often dominated by writes. HPC (High Performance Computing) file systems are designed to absorb these bursty outputs at high bandwidth through massive parallelism. However, the delivered write bandwidth often falls well below the peak. This paper characterizes the data absorption behavior of a center-wide shared Lustre parallel file system on the Jaguar supercomputer. We use a statistical methodology to address the challenges of accurately measuring a shared machine… CONTINUE READING
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