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Using Linux To Make a Slow, Awful WAN Connection
Julie188 writes "This is a brilliant little Linux trick from Windows fanboy Tyson Kopczynski. He wanted to test a new Windows 7 feature called Branch Cache, which caches remote data on the local machine to reduce traffic on a stressed out WAN connection. But how to fake a crappy WAN? Linux. 'The command that I executed (tc) made use of Linux Traffic Control (a kernel thing) which allows me to easily interject 100ms latency on eth1. Boff, Bonk, Pow, Plop, Kapow, swa-a-p, whamm, zzzzzwap, bam ... instant WAN crappiness,' he writes."
What is the point of doing this? Is this even of remote interest to anyone other than the author of the article? If there's a genuine reason for this to be important or at least intriguing, someone please speak...
how did that windows caching stuff he was testing out perform? or is this article just a synopsis of the man page for a common command .... ?
The problem with slashdot is that most of its users were bullied and stuffed into lockers as kids!
Such capability is very useful to network folks to predict application behavior and best management approaches in various environments. We used FreeBSD for that purpose, but the effect was the same. We injected 350ms latency in each direction, and presto - satellite communication. That is enough to cripple TCP connectivity through a sizable pipe (latency will preclude the flow from taking entire pipe). By testing various acceleration methodologies, you can see first hand which one will allow you to fully utilize the bandwidth you are paying for, all in the comfort of your lab.
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It's been 13 years. In Moore years that's a long time. Let it go.