Seeding problem

[Clinch]

I am using a 100mbit full duplex connection. There's no firewall, I am connectable and everything's peachy.

For some reason if I am uploading at 2mb/s while I am still downloading and then downloading suddenly stops, my upload will drop down to 100-150kb/s occasionally going up to 450kb/s.

This is for torrents that download 100% or partially skipped torrents. On partially skipped torrents if I set a few files back to normal priority my upload will shoot up again.

Wondering if anyone could explain why this is happening?!?

[Switeck]

Sounds like Disk Overload -- a physical or logical (software) limitation of your setup.

The non-sequential nature of BitTorrent access causes hard drives to be in permanent seek mode, dropping overload speed of the drive/s to less than 1/10th of its rated sequential speed.

If the hard drive µTorrent is reading(seeding from)/writing(downloading to) from the same drive as your windows OS...this problem is FURTHER compounded.

USB external drives also have another major bottleneck in that the data link between the drive and the computer is sequential by nature (USB!) and also suffers a similar speed penalty doing "random" accesses.

[Clinch]

is the problem exasperated by wine?

Ive been trying to find some solutions to it. Right now I got my cache set ultra high like 300mb, but for some reason according to statistics the read from file per second number doesn't get affected much.

[jewelisheaven]

You changed the cache? Well certainly if there is a bottleneck you'll slowly see it fill... until it all stops whenever it decides to dump the data to disk.

Disk overload is usually experienced during downloading, but I guess it's feasible to also happen during uploading... maybe non-DMA channel transfer modes are the cause.