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I am trying to determine the VPN performance on our server - a dual Xeon
3.2 Ghz system. I am using the well known "iperf" tool for testing.
When I run a test from one client to the server, the results are
basically predictable:NON-VPN: [ 5] 0.0-60.0 sec 673 MBytes 94.1 Mbits/sec VPN: [ 5] 0.0-60.0 sec 642 MBytes 89.8 Mbits/sec When I run with 1 client, and 10 streams between the client and server, the results are also basically predictable: NON-VPN: [SUM] 0.0-60.1 sec 674 MBytes 94.1 Mbits/sec VPN: [SUM] 0.0-60.1 sec 642 MBytes 89.7 Mbits/sec What is not predictable is what happens if I run with 10 clients, 10 streams between client and server each, I get: NON-VPN: [SUM] 0.0-60.1 sec 601 MBytes 83.9 Mbits/sec [SUM] 0.0-60.1 sec 599 MBytes 83.6 Mbits/sec [SUM] 0.0-60.3 sec 597 MBytes 83.0 Mbits/sec [SUM] 0.0-60.1 sec 598 MBytes 83.6 Mbits/sec [SUM] 0.0-60.3 sec 594 MBytes 82.7 Mbits/sec [SUM] 0.0-60.1 sec 602 MBytes 84.0 Mbits/sec [SUM] 0.0-60.1 sec 606 MBytes 84.6 Mbits/sec [SUM] 0.0-60.1 sec 601 MBytes 83.9 Mbits/sec [SUM] 0.0-60.1 sec 599 MBytes 83.6 Mbits/sec [SUM] 0.0-60.1 sec 598 MBytes 83.5 Mbits/sec total: 836.4 Mbits/sec VPN: [SUM] 0.0-81.2 sec 248 MBytes 25.7 Mbits/sec [SUM] 0.0-87.1 sec 234 MBytes 22.5 Mbits/sec [SUM] 0.0-104.8 sec 320 MBytes 25.6 Mbits/sec [SUM] 0.0-105.4 sec 475 MBytes 37.8 Mbits/sec [SUM] 0.0-107.4 sec 212 MBytes 16.6 Mbits/sec [SUM] 0.0-107.3 sec 178 MBytes 13.9 Mbits/sec [SUM] 0.0-110.0 sec 187 MBytes 14.3 Mbits/sec [SUM] 0.0-113.2 sec 225 MBytes 16.7 Mbits/sec [SUM] 0.0-116.3 sec 234 MBytes 16.9 Mbits/sec [SUM] 0.0-153.0 sec 641 MBytes 35.1 Mbits/sec total: 225.1 Mbits/sec --- I've run this test several times and get basically the same results. The NON-VPN case is predictable, but the VPN case, I do not understand at all. The clients are on 100 mbit full duplex. The server has 1 gbit full duplex. Why is there such a difference between the VPN and NON-VPN case in the last case!? Jason Keltz jas@xxxxxxxxxxx ____________________________________________ Openvpn-users mailing list Openvpn-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/openvpn-users |