-------- Forwarded Message -------- From: Aaron Konstam akonstam@sbcglobal.net To: For users of Fedora fedora-list@redhat.com Subject: Re: More on bittorrent Date: Mon, 26 Feb 2007 18:35:22 -0600
On Mon, 2007-02-26 at 13:24 -0800, Kam Leo wrote:
On 2/26/07, Aaron Konstam akonstam@sbcglobal.net wrote:
On Mon, 2007-02-26 at 10:30 -0800, Kam Leo wrote:
On 2/26/07, Aaron Konstam akonstam@sbcglobal.net wrote:
Aaron Konstam wrote: I wanted to download the latest FC6 respin CDs. I went to the web location and found the correct bittorrent and clicked to download it. The bittorrent GUI opened and the download started. Now I was
connected
to a system with an Internet speed of 45 Mb/s but the GUI said the download would take 15 hours. Well the respin has 5 CDs. I have a downloaded a single 600+ Meg CD in less than an hour (actually I
think
it was much less). So I can't understand why the bittorrent download should take 15 hours.
I have done this before but it has been a long time ago. I must be
doing
something wrong but what? Any ideas?
A couple of things to check - do you have a download speed limit set, so that it does not use the full bandwidth when downloading? Do you have your firewall properly configured so that you can seed as well as download? If not, this can limit your download speed. How many seeds are there, compared to the number of clients, and how many are you connected to?
My download speed was set too high. I have no firewall set on my machine but the university does however they tell me that they do not restrict bittorrents. I don't know how to check the number of seeds and /or number of clients.
So there are clearly holes in my knowledge. Can someone help fill in the gaps.
One other thing to keep in mind is that the time estimate when you first start downloading is usually high, and drops as you connect to more feeds. It also tends to change during the download. Depending on how the client calculates the time remaining, it may get less sensitive to rate changes as the download progresses - more data to average, so temporary fluctuations in download speed do not affect it as much.
The above is true but I waited 2 hours and not even 1 CD was downloaded.
Bittorrent works when there are a large number of seeders and peers. The problem with the Fedora respin is that after the initial availability announcement the number of seeders and peers drops to a very low number, less than 5 when I tried it. If each shares the minimum required upload speed, 4K bits/second, the total bandwidth is only 20K bits/second. Factor the low number of participants and the problem of finding peers with the fragments missing from your download and you get the current situation. Also I find that the tracker used by Fedora respin does not work well with my setup which is behind a firewall.
So am I conclude that >10 hours may be what it will take. How do you find out how many seeders are active? --
Use Azureus. It shows the number of seeders and peers connected to your swarm.
That is ok if I can figure out how. How do you get azureus to download a bittorrent at a web site? -- ======================================================================= The wise and intelligent are coming belatedly to realize that alcohol, and not the dog, is man's best friend. Rover is taking a beating -- and he should. -- W.C. Fields ======================================================================= Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam@sbcglobal.net