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Thank you uTorrent!!!!!


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Ironically, it isn't just upload speed that nets you big download speeds in return, it is upload speed PER upload slot.

You could have 100 KiloBYTES/sec upload speed (and actually reach that amount), yet get less than 100 KiloBYTES/sec download speed if you try to run 10 torrents with 10+ upload slots each. That's because to each person (well their ip anyway) you're uploading to at any given moment is only receiving <1 KiloBYTE/sec on average.

A connection with only 20 KiloBYTES/sec upload speed could run 2 torrents with 4 upload slots each and because it's sending out 2.5 KiloBYTES/sec PER upload slot (8 total upload slots)...it might be getting 100+ KiloBYTES/sec download speed in return...if there's enough seeders or very fast peers on the 2 active torrents.

The "sweet spot" for upload speed PER upload slot seems to be between 3 and 10 KiloBYTES/sec. Any lower, and peers may ignore your upload to them ...and not return the favor.

Any higher, and many/most peers CAN'T upload that fast back to you!

Getting in that "sweet spot" zone will likely get the biggest download speed possible in return.

However on torrents you're seeding, you may want slightly fewer upload slots just so the peers you're uploading to can complete whole pieces to share to others. If the piece size is 2 MB, then to send a complete piece to a peer takes almost 7 minutes at 5 KiloBYTES/sec upload speed PER upload slot.

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I was talking about how you need upload to keep a ratio above 1. If you download a DVD in 2 hours... well nice! But it sucks if it takes 2 weeks of uploading before you are back at ratio of 1 on that torrent. You can finally remove it and replace it with another DVD download.

So although you download a DVD in 2 hours downloading two DVDs takes 2 weeks... and in the end you only download one DVD every 2 weeks. So downloading fast looks nice (and is nice if you want something to view tonight) but upload is what its really about in the torrent business :)

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