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Created: Ken Brobeck May 4, 2017 Modified: May 4, 2017 |
Use ttcp to test network speed (01/24/14) ----------------------------------------- ttcp is installed in /home/jingchen/bin/ttcp
- Test network speed between lcls-opi09 and lcls-opi10 (on a 100Mbps link)
on lcls-opi10 (receive side) ttcp -f M -r -s -n 204800 on lcls-opi09 (send side) ttcp -f M -t -s -n 204800 172.27.8.81
204800 is number of buffers sent; buffer length is 8192 Bytes: i.e., total of 1677721600 bytes (1677MB) sent to 172.27.8.81 (lcls-opi10)
Result: ttcp-t: 1677721600 bytes in 142.34 real seconds = 11.24 MB/sec +++ The speed of the nework between lcls-opi09 and lcls-opi10 is 11.24 MB/sec (or 11.24 x 8 = 89 Mbps)
- Test network speed between lcls-builder and lcls-srv05 (on a 1Gbps link) [jingchen@lcls-srv05 ~]$ ttcp -f M -r -s -n 204800 [jingchen@lcls-builder ~]$ ttcp -f M -t -s -n 204800 172.27.8.29
Result: ttcp-t: 1677721600 bytes in 14.38 real seconds = 111.25 MB/sec +++ (or 111.25 x 8 = 890 Mbps)
The results make sense, as lower than the link speed.
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Author:K. Brobeck
Modified:
04-May-2017