on 4-2-2009 1:36 PM Marko Vojinovic spake the following: > On Thursday 02 April 2009 18:53, Karanbir Singh wrote: >> John R Pierce wrote: >>>> here is a bit more trivia for those interested: the 4 main 'seeds' that >>>> came up were each running with 100mbps open uplinks. Atleast one person >>>> in the early stages was running at 200 odd mbps. >>> geez, makes me wonder if I should even bother to leave mine running with >>> a 50kbyte/sec uplink ca (thats about 500kbps)... >> If you can - you should. The costs of running those torrents at 100mbps >> is way too high to run over any sustained period of time ( and they are >> all offline now ). So once the first rush has spread out - the whole >> user experience is totally driven by the other users part of the deluge. >> >> Normally, I'd keep 1 machine running from within .centos.org to make >> sure there was always atleast 1 seed for each of the torrents. And that >> machine runs only at 10mbps, for all the torrents and is also a part of >> other services within centos.org > > Aren't these speeds a relative notion, ie. dependent on where you are as a > peer? > > I mean, I have a 100Mbps link to my local LAN, which is connected via a 2Gbps > optical cables to my national center, which in turn has several uplinks of > various bandwidth (from 32Mbps to 10Gbps) connected to surrounding countries. >>From there on I don't know. So how can I be sure that for example someone on > the other side of the planet can utilize my whole bandwidth? > > Of course, we can initiate some peer-to-peer data transfer and measure the > actual speed, but isn't the terminology "100Mbps to outside world" a little > bit undefined in general? Because not all parts of "outside world" may always > have greater bandwidth than my uplink? > > Is there maybe some web site with a planet-wide topology of the internet, > along with actual bandwidths of all the links, so one can estimate the > transfer speed between two arbitrary points on the globe? > > FWIW, tommorow I'll use torrent to download the dvd iso's for CentOS 5.3 > (32bit and 64bit archs), and I can leave them seeded 24/7 for an undefinite > time in the future, cca 3 years at least, or maybe untill 5.4 appears. If > anyone can pull 100Mbps from me, I'll be glad to help the community. It's > only that I am not so sure that it is well defined to say "I have an 100Mbps > uplink". Uplink to my nearest neighbor, yes, but further than that... > > Best, :-) > Marko But with bittorrent, one person doesn't use all of your bandwidth. Hundreds of users are each using a small percentage of it. So if you have 100 peers accessing 100 different slices of the torrent at 1 mb each, there goes the whole 100 mb. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 258 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20090402/10332a2f/attachment-0005.sig>