I just tried with OpenSSH from pkgsrc (openssh-5.8.2nb5) on the receiver side and it gives full speed:
file100M.dat 22% 23MB 11.2MB/s 11.3MB/s 00:06 ETA 2015-03-20 9:38 GMT+01:00 Stephan <[email protected]>: > That gives me about 9,3 MB/s in my test, contratry to 8,5 MB/s without > specifying the cipher. > > I don´t know, however, what ciphers are used if I don´t specify one. > > 2015-03-20 7:21 GMT+01:00 Michael van Elst <[email protected]>: >> [email protected] (Stephan) writes: >> >>>When I copy large files through scp to a NetBSD box, I get transfer >>>speeds of only 7 MB/s on a 100 MBit connection. This should be around >>>11 MB/s. I´ve seen this on different x86/amd64 hardware with NetBSD 5, >>>6 and 7-BETA. The NICs are largely wm, fxp and bnx. >> >> scp speed most often is limited by the CPU doing the encoding (or worse: >> compression). >> >> You could try something like: >> >> scp -oCiphers=arcfour .... >> >> On a modern computer that's more than 4 times as fast as the default >> AES cipher. If you don't trust arcfour, maybe blowfish-cbc is good >> enough for you and still about 3 times as fast. >> >> >> -- >> -- >> Michael van Elst >> Internet: [email protected] >> "A potential Snark may lurk in every tree."
