[Samba] Poor linux client performance (comparing to XP)

Denis Vlasenko vda at port.imtp.ilyichevsk.odessa.ua
Mon Oct 4 15:46:10 GMT 2004

On Monday 04 October 2004 16:15, Bostjan Skufca @ domenca.com wrote:
> When using 1 client, it is 95% idle, when using 2 clients it is 85% idle.
> When using 2 clients the throughput roughly doubled (from ~4MB/s to ~8MB/s)

Sounds like network isn't utilized to full potential.
Rather strange, samba uses TCP for file copying AFAIK
and TCP should adapt nicely to bandwidth/delay charasteristics of the link.

Do http downloads from same server to same client behave the same
as samba download?

Did you try to disable TCP_NODELAY and/or sendfile?

Do tcpdump on single download stream, look close at packet timestamps
and also post it here along with your findings and try to bring attention
from _real_ TCP gurus (as oppsed to me).

> PS: nice tool btw

You just uncovered my evil plan: I am trying to secretly spread it all
around the world.

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