forum.utorrent.com

Is there a recommended router NAT udp "connection" timeout value?

那就算了~

Trial for a while。

I hope nat traversal will be introduced in 1.9

New alpha!

Nice :-) I was wondering when the next alpha's/beta's would be comming.

The main change is that uTP (UDP torrenting) is added and enabled by default.

Confused. What is that supposed to be? UDP tracker capability, UDP hole punching or ...? Where is more info?

It also has real-time transfer rate control and latency minimization.

Same here, more info please. Both can mean a lot of things.

Sidenote; I didn't see any options in the Advanced Settings to control these functions.

Testing it now... I didnt get a crash but there is a major lag when you start up the program and all the torrents initialize and connect to the tracker.
Ive got about 15 torrents seeding and 1/2 started to seed instantly then after 2 minutes the rest of the torrents went green.
Firon could you could look at that...see if you get that.....
I didnt get the crashes everyone else has been getting im running on server 03 and no probs apart for the lag.

rafi wrote:

How about a change-log with the rest of the changes (not related to the "main change" ) ?

edit:
found this about uTP : http://forum.bittorrent.org/viewtopic.php?pid=391#p391

Not true. UDP trackers are unrealted to uTP.

alus wrote:

Fixed, thanks!

Just in case, as this _may_ be a different bug (it doesn't crash for me)
1.9

1.8.1 , same torrent

Last edited by Alpha-Toxic (2008-11-26 11:58:49)

How long has uTP been in uTorrent? I'm seeing uTP connections to both uTorrent 1.8.1 and BitTorrent 6.1.1. Which means that the announcement is wrong.

uTP is new, that's nice. but again, what it is?

@niksus: It basically lays BitTorrent on top of UDP, which provides for better flow control, no TCP RST packet attacks, and probably other stuff I'm not thinking of off the top of my head.

Edit (2008-12-01): For clarification, the fact that TCP RST attacks are nullified by this change is a side-effect of the move to UDP, and was not the motivating factor that led to its implementation. uTP was in the works long before it was discovered that Sandvine was using the aforementioned tactic to interfere with BitTorrent traffic.

@Klaus: uTP has been in the works for a long while now, and parts of it have made their way in to previous versions little by little. Whether that explains what you're seeing, I don't know, but uTP (at least in its current, now mostly-complete, and actually actively enabled form) is new to 1.9.

Last edited by Ultima (2008-12-01 16:30:07)

Klaus_1250 wrote:

New alpha!

Nice :-) I was wondering when the next alpha's/beta's would be comming.

The main change is that uTP (UDP torrenting) is added and enabled by default.

Confused. What is that supposed to be? UDP tracker capability, UDP hole punching or ...? Where is more info?

It also has real-time transfer rate control and latency minimization.

Same here, more info please. Both can mean a lot of things.

Sidenote; I didn't see any options in the Advanced Settings to control these functions.

What is not in 1.9:
UDP hole punching (yet?)
UDP tracker

What is in 1.9:
uTP, the micro transport protocol. This UDP-based reliable transport is designed to minimize latency, but still maximize bandwidth when the latency is not excessive. We use this for communication between peers instead of TCP, if both sides support it. In addition, we use information from this transport, if active, to control the transfer rate of TCP connections. This means uTorrent, when using uTP, should not kill your net connection - even if you do not set any rate limits.

What was in 1.8.1:
uTP, but connection attempts were not initiated by default, and there was no control over TCP as described above. You can enable it, but likely you will see the uTP connections not transfering much data, because they are pushed out of the way by TCP.

What this means for rate control:
You are still free to set rate limits and use external limiters. The "Automatic upload rate" control is flawed enough for most people that it will likely be removed once uTP is well tested and deployed, since it entirely supercedes that feature.

Well, from the first glance, it doesn't seem to work OK. As soon as I start downloading something, upload performance drops like brick in a vacuum. With 1.8.1 I can upload 145KB/s and download 700KB/s, 1.9 falls to 40KB/s at a 200KB/s download Using mostl uTP connections to uT and BT). Looking at the internal graph, the upload mirrors the download. But I can't tell whether this is 1.9 or the uTP-implmentation in uT1.8.1/BT6.1.1.

[edit]just tested 1.9 with UDP connections blocked. 900KB/s down (limited) and 130KB/s up. Seems it fixes a bug in 1.8.1 as well, where uTorrent had difficulty connecting and uploading to certain peers[/edit]

Last edited by Klaus_1250 (2008-11-26 16:12:00)