[Mono-list] Why is MONO network streaming slow?

[William Huskey]

sorry, the issue has more to do with how many other systems are on the
network, are they the same computer and NIC. if not it may be the NIC driver
or the Linux TCP/IP stack first. I can get 11MB second on 100 Mb also using
NFS or SMB but its not until the first 20 - 30 meg is sent that it is seen.
in your test I see you do not have buffering turned off -D which can throw
off a measurement.

Overhead on a network can be
packet re-packaging (going through NAT)
Packet handling as in routing
TCP to TCP handshaking and resend

also packet size will produce a difference in speeds between system.
packages up to 1024 bytes in size should transfer the same speed (should!!)

MTU size also effects most of the transfer speed and is set by the TCP/IP
stack not the program and is specific to the OS.
http://www.cisco.com/univercd/cc/td/doc/product/vpn/client/4_6/admin/vcach8.htmwill
give information on how to set that.

to know if this is a MONO problem we need to have it tested where each
machine is the same build
test with a Switch in place (25 - 50 test no buffering)
test with crossover (this will tell if the network cards them selves have
issues)

use a independent machine to also capture available bandwidth on each side.

at work we use Chariot
http://www.netiq.com/news/releases/release.asp?cid=20020513100815ECVG to
test this.




On 6/19/07, Alan McGovern <alan.mcgovern at gmail.com> wrote:
>
>
>
> On 6/19/07, Adam Tauno Williams <adam at morrison-ind.com> wrote:
> >
> > > wow there is so much wrong with this test,
> > > First I find it hard to believe that you got up to 90% efficiency on a
> >
> > I noticed that too.
> > "NET --> .NET : 94 Mbit/s   O.K." on a 100Mb/s network.
> > Bogus.  No way.
> >
> > >  transfer  at all, network over head should have knocked down your
> > > transfer more than that.
> >
> > Yep.
>
>
> Nope,  i've transferred files  on my home network and reached over
> 90Mbit/sec on a 10/100 network. It's definitely not beyond the realms of
> possibility that he achieved 93Mbit/sec.
>
>
>
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>


-- 
William S. Huskey

UNIX Systems Engineer

Maritime Systems Solutions Division

SAIC

Tel: 425-267-5643

Email: huskeyw at saic.com
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