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Re: [Bug-wget] Support for long-haul high-bandwidth links

From: Daniel Stenberg
Subject: Re: [Bug-wget] Support for long-haul high-bandwidth links
Date: Wed, 30 Nov 2011 19:26:37 +0100 (CET)
User-agent: Alpine 2.00 (DEB 1167 2008-08-23)

On Wed, 30 Nov 2011, Fernando Cassia wrote:

When downloading a large file over a high-latency (e.g. long physical distance) high-bandwidth link, the download time is dominated by the round-trip time for TCP handshakes.

First off, this early conclusion is incorrect. RTT has basically no impact on an ongoing TCP transfer these days since they introduced large windows for like a decade ago.

Which is why large files should be stored on FTP servers, not http.

This is a myth repeated by people all over the net and through-out history. It is not true.

I've tried to spell out some FTP vs HTTP facts here: http://daniel.haxx.se/docs/ftp-vs-http.html


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