SCHEDULE: NOV 10-16, 2012
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On Using Virtual Circuits for GridFTP Transfers
SESSION: Grid Computing
EVENT TYPE: Papers
TIME: 11:30AM - 12:00PM
SESSION CHAIR: Jim Basney
AUTHOR(S):Zhengyang Liu, Malathi Veeraraghavan, Zhenzhen Yan, Chris Tracy, Jing Tie, Ian Foster, John Dennis, Jason Hick, Yee-Ting Li, Wei Yang
ROOM:355-D
ABSTRACT:
GridFTP transfer logs obtained from NERSC, SLAC, and NCAR, were analyzed. The goal of the analyses is to characterize these transfers and determine the suitability of dynamic virtual circuit (VC) service for these transfers instead of the currently used IP-routed service. Given VC setup overhead, the first analysis of the GridFTP transfer logs characterizes the duration of sessions. Of the NCAR-NICS sessions analyzed, 56% of sessions would have been long enough to be served with dynamic VC service. An analysis of transfer throughput across four paths, NCAR-NICS, SLAC-BNL, NERSC-ORNL and NERSC-ANL, shows significant variance. An analysis of the potential causes of this variance shows that server-related factors are more important than network-related factors. This is because most of the network links are lightly loaded, which implies that throughput variance is likely to remain unchanged with virtual circuits.
Chair/Author Details:
Jim Basney (Chair) - National Center for Supercomputing Applications
Zhengyang Liu - University of Virginia
Malathi Veeraraghavan - University of Virginia
Zhenzhen Yan - University of Virginia
Chris Tracy - Energy Sciences Network
Jing Tie - University of Chicago
Ian Foster - University of Chicago
John Dennis - National Center for Atmospheric Research
Jason Hick - Lawrence Berkeley National Laboratory
Yee-Ting Li - SLAC National Accelerator Laboratory
Wei Yang - SLAC National Accelerator Laboratory
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On Using Virtual Circuits for GridFTP Transfers
SESSION: Grid Computing
EVENT TYPE:
TIME: 11:30AM - 12:00PM
SESSION CHAIR: Jim Basney
AUTHOR(S):Zhengyang Liu, Malathi Veeraraghavan, Zhenzhen Yan, Chris Tracy, Jing Tie, Ian Foster, John Dennis, Jason Hick, Yee-Ting Li, Wei Yang
ROOM:355-D
ABSTRACT:
GridFTP transfer logs obtained from NERSC, SLAC, and NCAR, were analyzed. The goal of the analyses is to characterize these transfers and determine the suitability of dynamic virtual circuit (VC) service for these transfers instead of the currently used IP-routed service. Given VC setup overhead, the first analysis of the GridFTP transfer logs characterizes the duration of sessions. Of the NCAR-NICS sessions analyzed, 56% of sessions would have been long enough to be served with dynamic VC service. An analysis of transfer throughput across four paths, NCAR-NICS, SLAC-BNL, NERSC-ORNL and NERSC-ANL, shows significant variance. An analysis of the potential causes of this variance shows that server-related factors are more important than network-related factors. This is because most of the network links are lightly loaded, which implies that throughput variance is likely to remain unchanged with virtual circuits.
Chair/Author Details:
Jim Basney (Chair) - National Center for Supercomputing Applications
Zhengyang Liu - University of Virginia
Malathi Veeraraghavan - University of Virginia
Zhenzhen Yan - University of Virginia
Chris Tracy - Energy Sciences Network
Jing Tie - University of Chicago
Ian Foster - University of Chicago
John Dennis - National Center for Atmospheric Research
Jason Hick - Lawrence Berkeley National Laboratory
Yee-Ting Li - SLAC National Accelerator Laboratory
Wei Yang - SLAC National Accelerator Laboratory
Click here to download .ics calendar file