Hi!
I have a problem with ktorrent. I tried versions 2.03, 2.1rc1, 2.1 release under FreeBSD 6.2. Very slow upload - not more 310 kilobytes/s per 1 peer in fast ethernet lan (100Mbit/s). Same peer can download from my ftp server more than 7 Megabytes per second.

P.S. Sorry for my poor English.

So you have one local peer seeding and one local peer sharing ?

This should work normally. I'll see if I can reproduce this.

George wrote:So you have one local peer seeding and one local peer sharing ?

I tested ktorrent in large LAN. During test only 1 torrent was active and only 1 peer download it.
During normal seeding, speed can be up to 300kbyte*(number of peers). But not more. Azureus can upload up to 15-20 times faster.

Small LAN, with 2 computers and a router : Upload cap set to 700 KB/s, downloads without any problem with the capped speed.

George wrote:Small LAN, with 2 computers and a router : Upload cap set to 700 KB/s, downloads without any problem with the capped speed.

Can you set upload cap to "no limit" and test again? How many maximum speed? Can you test with another (not ktorrent) client on download peer?

No limit ups the speed to 1.5 MB/s.

Currently I'm busy with something else, after that I gonna see if I can improve things.

Note: the router between the 2 computers, is still in development, so I'm not quite sure what speed I can get. I will have to use iperf to find that out.

Btw, how big where the chunks of the torrent ?

George wrote:No limit ups the speed to 1.5 MB/s.

Currently I'm busy with something else, after that I gonna see if I can improve things.

Try, please, to improve seeding speed, because using ktorrent user has low ul/dl rate on trackers.

Btw, how big where the chunks of the torrent ?

I tried with different size of chunk 1-4MB.



P.S. I think, I found one other bug, but I test it again. Yesterday I failed to create new torrent with large files (total size approx 9GB, chunk size 4MB). After creation I remove torrent and add it again - ktorrent mark all chunks after 1024 as bad or not downloaded. So, I create torrent with uTorrent1.6 and ktorrent add it correctly.

Try, please, to improve seeding speed, because using ktorrent user has low ul/dl rate on trackers.

If you call 800KB/s slow, then yes, ktorrent is slow however, my internet connection is limited at 1.22MB/s, so I can't get more than 1.22MB/s out of ktorrent (which I would hit fairly regularly if I didn't have ktorrent limited to 800KB/s)

Tomasu wrote:

Try, please, to improve seeding speed, because using ktorrent user has low ul/dl rate on trackers.

If you call 800KB/s slow, then yes, ktorrent is slow however, my internet connection is limited at 1.22MB/s, so I can't get more than 1.22MB/s out of ktorrent (which I would hit fairly regularly if I didn't have ktorrent limited to 800KB/s)

I can't get upload faster than 315kB/s to 1 peer. This is very slow - other clients (Azureus, uTorrent under Windows) allows to upload 4-6 MB/s on same network.

OK, I have done some changes (they are not committed yet), which seem to have upped the speed significantly into the 4 to 6 MB/s range.

I also did the same test with azureus, which surprisingly didn't make it past the 2 MB/s. And it was most of the time below the 1 MB/s.

And maybe I can even get more, the seeding PC is an old 500 Mhz pentium 3 laptop.

The throughput I got with iperf was nearly 11 MB/s, so we seem to be getting around 50 % of the LAN capacity.

I'm gonna do some more testing before I commit this.

George wrote:OK, I have done some changes (they are not committed yet), which seem to have upped the speed significantly into the 4 to 6 MB/s range.

Thank you very much!

I also did the same test with azureus, which surprisingly didn't make it past the 2 MB/s. And it was most of the time below the 1 MB/s.
And maybe I can even get more, the seeding PC is an old 500 Mhz pentium 3 laptop.

azureus written on java and require very fast cpu and lots of memory to works effectively.

I'm gonna do some more testing before I commit this.

ok, thanks!

I also did the same test with azureus, which surprisingly didn't make it past the 2 MB/s. And it was most of the time below the 1 MB/s.
And maybe I can even get more, the seeding PC is an old 500 Mhz pentium 3 laptop.

azureus written on java and require very fast cpu and lots of memory to works effectively.

Well, I'm running it on an amd64 3500 with 1 GB of RAM, I was expecting more then that.

George wrote:OK, I have done some changes (they are not committed yet), which seem to have upped the speed significantly into the 4 to 6 MB/s range.

Hi, George! Have you committed these changes already or not?

2 minutes ago

Things have changed quite a bit, so their might be some bugs left.

George wrote:2 minutes ago

Things have changed quite a bit, so their might be some bugs left.

Yeees! it works!!! I test seeding speed now approx. 1,8-3.1MByte/s per 1 peer.
Thank you very much!