<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Times New Roman; font-size: 12pt; color: #000000'>It seems that <span>ssh has a significant reducing effect on throughput.</span><br><br><span id="1db0e1d5-cb88-49a4-8e2f-e90f3b6109a8">[root@server2 ~]# dd if=/dev/zero bs=4M count=256 | ssh root@server1 "dd of=/dev/null"<br>256+0 records in<br>256+0 records out<br>1073741824 bytes (1.1 GB) copied, 26.3507 seconds, 40.7 MB/s<br>2097141+22 records in<br>2097152+0 records out<br>1073741824 bytes (1.1 GB) copied, 26.2736 seconds, 40.9 MB/s</span><br><span id="1db0e1d5-cb88-49a4-8e2f-e90f3b6109a8">Session on host1 (reciever):<br><br></span><br><span id="1db0e1d5-cb88-49a4-8e2f-e90f3b6109a8"><span id="1db0e1d5-cb88-49a4-8e2f-e90f3b6109a8"></span>I found one that depends on nc, rather than ssh.<br><br>[root@server1 ~]# netcat<br>-bash: netcat: command not found<br>[root@server1 ~]# nc<br>usage: nc [-46DdhklnrStUuvzC] [-i interval] [-p source_port]<br> [-s source_ip_address] [-T ToS] [-w timeout] [-X proxy_version]<br> [-x proxy_address[:port]] [hostname] [port[s]]<br>[root@server1 ~]# nc -l 12345<br>hello<br>[root@server1 ~]# nc -l 12345 > /dev/null<br><br>Matching session on host2 (sender):<br><br>[root@server2 ~]# echo "hello" | nc -v server1 12345<br>Connection to server1 12345 port [tcp/italk] succeeded!<br>[root@server2 ~]# dd if=/dev/zero bs=4M count=256 | nc -v server1 12345<br>Connection to server1 12345 port [tcp/italk] succeeded!<br>256+0 records in<br>256+0 records out<br>1073741824 bytes (1.1 GB) copied, 7.67299 seconds, 140 MB/s<br><br>I still don't know how to use netperf, but I'll get there.<br><br><span name="x"></span>--<br>David L. Willson<br>Trainer, Engineer, Enthusiast<br>RHCE Network+ A+ Linux+ LPIC-1 Ubuntu<br>Mobile 720-333-LANS(5267)<br><br>This is a good time for a r3VOLution.</span><br></div></body></html>