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

270

275

280

285

290

1 2 3 4 5

Test iteration

Throughput