10 Jan 2008

09Jan08

Dear lazyweb,

In bzr development we are now working primarily on network performance. One of the key things about being sure we have improved things is automated, repeatable benchmarks. And for that to be useful in networking environments we need to control latency and bandwidth and packet loss.

I know this isn’t a new problem, but it was about 5 years ago that I last did this sort of thing. What are the best tools today (for linux :)). Ideally I’d be able to bring up a bunch of local addresses like 127.0.1.1 or 127.0.0.2, with different properties – such that traffic from 127.0.0.1 to 127.0.0.2 will simulate being uploaded over adsl, and 127.0.0.2 to 127.0.0.1 will simulate being downloaded over adsl.

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