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
Today’s Demo
wuneng
Cheetah Atl
Cheetah ORNL
zelda4 Cheetah MCNC
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
Experimental Results
Test Specifics: ~1GB transfer size, 17ms RTTStd.Dev: 7 Mbps
zelda4 to wuneng
260
265
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275
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285
290
1 2 3 4 5
Test iteration
Throughput