polyakov at slyserver.com
Fri May 9 17:01:34 UTC 2008
Jerker Nyberg wrote:
> What do I tweek to get the best seeding performance out of rtorrent? I
> have 1 Gbit/s bandwidth to play with, six machines with 2 drives and 2
> GByte RAM each. I copied the data (100 GB) to all 12 drives and got
> around 300 Mbit/s total upload bandwidth. I used a rtorrent process
> for each drive. (I seeded some free OSes.)
> It seems like the drives are busy seeking. The bandwidth for each
> drive is only 3 MByte/s... How can I improve this? Any knobs to turn?
What OS (kernel version) and filesystem type do you have? How many
upload connections per server do you have in rtorrent?
> I would like rtorrent to really read every chunk into the disk cache
> the first time it is accessed. I know rtorrent is using mmap'ed read
> ahead using madvise. Shouldn't a whole chunk be read into RAM the
> first time it is accessed? Or is this what is done? Are the chunks not
> big enough? Chunk sizes are 262144, 524288 or 1048576 bytes. Any other
I think that would hurt performance as 2GB is not enough to hold all
transferring chunks at 200 mbit/sec.
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