今天测试机房的两台服务器之间的网络带宽,发现了一个奇怪的现象:
同时测试上下行带宽:
[root@ptl3m log]# iperf -c 172.28.2.21 -t 60 -i 10 -d -L 8083
------------------------------------------------------------
Server listening on TCP port 8083
TCP window size: 4.00 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 172.28.2.21, TCP port 5001
TCP window size: 400 KByte (default)
------------------------------------------------------------
[ 3] local 172.28.2.23 port 46174 connected with 172.28.2.21 port 5001
[ 5] local 172.28.2.23 port 8083 connected with 172.28.2.21 port 39939
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 4.37 GBytes 3.75 Gbits/sec
[ 5] 0.0-10.0 sec 552 MBytes 463 Mbits/sec
[ 3] 10.0-20.0 sec 4.84 GBytes 4.16 Gbits/sec
[ 5] 10.0-20.0 sec 221 MBytes 185 Mbits/sec
[ 3] 20.0-30.0 sec 4.87 GBytes 4.19 Gbits/sec
[ 5] 20.0-30.0 sec 303 MBytes 254 Mbits/sec
[ 3] 30.0-40.0 sec 4.01 GBytes 3.45 Gbits/sec
[ 5] 30.0-40.0 sec 1.04 GBytes 891 Mbits/sec
[ 3] 40.0-50.0 sec 4.81 GBytes 4.14 Gbits/sec
[ 5] 40.0-50.0 sec 223 MBytes 187 Mbits/sec
[ 3] 50.0-60.0 sec 4.75 GBytes 4.08 Gbits/sec
[ 3] 0.0-60.0 sec 27.7 GBytes 3.96 Gbits/sec
[ 5] 50.0-60.0 sec 347 MBytes 291 Mbits/sec
[ 5] 0.0-60.0 sec 2.65 GBytes 379 Mbits/sec
从上面可以看到这种测试方法上下行带宽差距较大。但是采用下面的命令测试,带宽差距就没有那么大:
[root@ptl3m log]# iperf -c 172.28.2.21 -t 60 -i 10 -r -L 8083
------------------------------------------------------------
Server listening on TCP port 8083
TCP window size: 4.00 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 172.28.2.21, TCP port 5001
TCP window size: 400 KByte (default)
------------------------------------------------------------
[ 3] local 172.28.2.23 port 46130 connected with 172.28.2.21 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 4.67 GBytes 4.01 Gbits/sec
[ 3] 10.0-20.0 sec 4.17 GBytes 3.58 Gbits/sec
[ 3] 20.0-30.0 sec 4.70 GBytes 4.04 Gbits/sec
[ 3] 30.0-40.0 sec 4.92 GBytes 4.23 Gbits/sec
[ 3] 40.0-50.0 sec 4.86 GBytes 4.18 Gbits/sec
[ 3] 50.0-60.0 sec 4.28 GBytes 3.68 Gbits/sec
[ 3] 0.0-60.0 sec 27.6 GBytes 3.95 Gbits/sec
[ 5] local 172.28.2.23 port 8083 connected with 172.28.2.21 port 38653
[ 5] 0.0-10.0 sec 3.91 GBytes 3.36 Gbits/sec
[ 5] 10.0-20.0 sec 4.02 GBytes 3.45 Gbits/sec
[ 5] 20.0-30.0 sec 3.92 GBytes 3.37 Gbits/sec
[ 5] 30.0-40.0 sec 4.02 GBytes 3.45 Gbits/sec
[ 5] 40.0-50.0 sec 4.06 GBytes 3.49 Gbits/sec
[ 5] 0.0-60.0 sec 24.1 GBytes 3.44 Gbits/sec
这种-d 和 -r参数对结果产生了影响,还是网卡的全双工有问题,还是其他配置有问题呢。请大佬指教!谢谢