Date: Wed, 3 Mar 2004 18:05:03 -0500 From: Charles Swiger <cswiger@mac.com> Cc: freebsd-ipfw@freebsd.org Subject: Re: ipfw/dummynet pipe size, is there a burst setting? Message-ID: <34868EFE-6D67-11D8-85AD-003065ABFD92@mac.com> In-Reply-To: <20040303120211.O8264-100000@oahu.WURLDLINK.NET> References: <20040303120211.O8264-100000@oahu.WURLDLINK.NET>
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On Mar 3, 2004, at 5:06 PM, Vincent Poy wrote: > ipfw pipe 1 config bw size > > to set the size of the pipe. I noticed on Linux, they can set a burst > size so it can burst a x number over the pipe size, is there a similar > setting available? I'm not sure I understand the semantics of this? How much bandwidth is available when using this burst mechanism-- and what traffic goes through when several things try to burst at once, for example? Anyway, you can use different weighted queues feeding into larger-sized pipe that will probably "do what you want"... > Also, I noticed for pipes, one can set the queue size > in slots of KBytes, how does one determine what's a good size? Consider the cross-product of network bandwidth times latency for your situation; a discussion of how to tweak the TCP receive window size is closely related... -- -Chuck
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