File Transfers to Support TSI/eScience
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File Transfers to Support TSI/eScience
• Use circuit-requestor to establish a dedicated circuit connecting ORNL and MCNC• Adjust kernel parameters for high-throughput connections• Run VSFTP for file transfer
Mark McGinley August 23, 2006
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Today’s Demo
wuneng
Cheetah Atl
Cheetah ORNL
zelda4 Cheetah MCNC
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Demo settingszelda4 wuneng
CPU Dual 2.8GHz Xeon Dual 2.8GHz Xeon
memory size 2GB 1GB
disk system 2x10000rpm SCSI RAID-0 2x15000rpm SCSI RAID-0
kernel version 2.6.17-1.2174_FC5smp 2.6.17-1.2174_FC5smp
file system ext3 ext3
rmem_default (in bytes) 8388608 8388608
rmem_max(in bytes)
16777216 16777216
wmem_default(in bytes)
8388608 4096000
wmem_max(in bytes)
16777216 16777216
tcp_rmem(in bytes; min, default, max)
4096 8388608 16777216 4096 8388608 16777216
tcp_wmem(in bytes; min, default, max)
4096 8388608 16777216 4096 4096000 16777216
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Experimental Results
Test Specifics: ~1GB transfer size, 17ms RTTStd.Dev: 7 Mbps
zelda4 to wuneng
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Test iteration
Throughput