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DTSTART;TZID=America/Chicago:20181112T103000
DTEND;TZID=America/Chicago:20181112T105500
UID:submissions.supercomputing.org_SC18_sess142_ws_pdsw103@linklings.com
SUMMARY:Integration of Burst Buffer in High-Level Parallel I/O Library for
  Exascale Computing Era
DESCRIPTION:Kai-Yuan Hou, Reda Al-Bahrani, Esteban Rangel, and Ankit Agraw
 al (Northwestern University); Robert Latham and Robert Ross (Argonne Natio
 nal Laboratory); and Alok Choudhary and Wei-keng Liao (Northwestern Univer
 sity)\n\nWhile the computing power of supercomputers continues to improve 
 at an astonishing rate, companion I/O systems are struggling to keep up in
  performance. To mitigate the performance gap, several supercomputing syst
 ems have been configured to incorporate burst buffers into their I/O stack
 ; the exact role of which, however, still remains unclear. In this paper, 
 we examine the features of burst buffers and study their impact on applica
 tion I/O performance. Our goal is to demonstrate that burst buffers can be
  utilized by parallel I/O libraries to significantly improve performance. 
 To this end, we developed an I/O driver in PnetCDF that uses a log-based f
 ormat to store individual I/O requests on the burst buffer – later to be f
 lushed to the parallel file system as one request. We evaluated our implem
 entation by running standard I/O benchmarks on Cori, a Cray XC40 supercomp
 uter at NERSC with a centralized burst buffer system, and Theta, a Cray XC
 40 supercomputer at ALCF with locally available SSDs. Our results show tha
 t IO aggregation is a promising role for burst buffers in high-level I/O l
 ibraries.\n\nTag: I/O, Storage\n\nRegistration Category: Workshop Reg Pass
 \n\n
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