Archive for January, 2008

23 Jan 2008


Tracing python programs. Today, Evan Dandrea asked a general question “Where is set -x for python”. A quick google for sys.settrace found: Some code snippets. I thought this was nice, but surely you want to be able to just trace an arbitrary program. So I present a ‘quick hack’ (5 minutes precisely :)) to do […]

22 Jan 2008


I send mail from my laptop by a local smarthost-with-auth install of exim4. Recently I got motivated to setup smtp submission port for this, as I got tired of borked hotel wifi intercepting smtp, and was behind a firewall that allowed no smtp out… It was pretty simple – on my mail server, enable listening […]

11 Jan 2008


thank you lazyweb; A number of folk have written to me pointing out Netem. One in particular, Yusuf Goolamabbas even provided a set of wrapper scripts for Netem that I’m going to be digging into next week. Netem is built around various lower level tools like tc, which is good (tc is what I was […]

10 Jan 2008


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, […]


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