Bit Torrent, Updating Linux

[Rajinder Yadav]

On Thu, Jul 9, 2009 at 4:08 PM, Lennart
Sorensen<lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org> wrote:
> On Thu, Jul 09, 2009 at 03:47:42PM -0400, Lennart Sorensen wrote:
>> So to download a 2MB package, you could request bytes 0-100k from server1,
>> 100k-200k from server2, 200k-300k from server3, and when each chunk
>> finishes start another.  That way you might get 10 pieces from server1,
>> 6 from server2 and the last 4 from server3, depending on their speeds
>> and loads.
>>
>> Look up 'http byte serving'.
>
> An example using the python-urlgrabber tool:
>
> urlgrabber --range=,10000 http://server1.org/package package.1
> urlgrabber --range=10000,20000 http://server2.org/package package.2
> urlgrabber --range=20000,30000 http://server3.org/package package.3
> urlgrabber --range=30000, http://server4.org/package package.4
>
> cat package.* > package
>
> The 4 urlgrabbers could run in parallel, and when all done you have
> the whole file.  Of course s smart download tool would do the byte
> range requests itself and write it to one file directly using seeks
> as appropriate.  The only requirement is that the http server support
> byte range requests, which many do, since it is required to do resume
> downloads.
>
> --
> Len Sorensen

Glad I asked about BT, the http byte serving is a cool idea that I
never heard about, nice to know it's already available. Now that I
have a better understand about things I can see why BT is not a good
idea, thank you for educating me!

-- 
Kind Regards,
Rajinder Yadav
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