Date: Tue, 10 Dec 2013 10:49:12 -0800 From: Charles Swiger <cswiger@mac.com> To: Anton Sayetsky <vsjcfm@gmail.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Round-trip time Message-ID: <99B169BC-A941-400A-BD7F-97A98B173C19@mac.com> In-Reply-To: <CAFG2KCJwC5=vMCZ%2BeVB8OhkXXiGxGPM%2B-074eGZmPqXAOdbf=g@mail.gmail.com> References: <CAFG2KCJwC5=vMCZ%2BeVB8OhkXXiGxGPM%2B-074eGZmPqXAOdbf=g@mail.gmail.com>
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Hi-- On Dec 10, 2013, at 7:03 AM, Anton Sayetsky <vsjcfm@gmail.com> wrote: > What mechanism I can use to artificially increase RTT? I think that > dummynet is bad variant because I need 10 Gbit/s+ bandwidth. Well, _any_ mechanism you choose will need to buffer 10+ Gb/s times the extra latency you want to add. If you can't get dummynet or AltQ to serve the role adequately, and you've got a budget for a commercial alternative, a company called Shunra makes network appliances which can add 150ms of latency to a 10 Gb/s link for things like testing network communications between geographically separate datacenters or the like. Regards, -- -Chuck
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