Re: File download from IIS is very slow

FYI: you are not the ISP. The provider of the DSL for download is your
"ISP". Have you verified via some other mechanism the actual download speed
of your DSL connection.

Remember that the bandwidth of your DSL is *not* equivalent to the
performance that an Internet user actually gets. The Internet is a large
series of network connections of variety of speeds between the server and
browser. Your ISP only says "your segment of the DSL is at this speed" but
makes no guarantee that all the other segments are similar/faster speed --
and since the effective bandwidth seen by a user is simply the lowest speed
(i.e. bottleneck) of all the network connections between them and the
server... you get the picture.

If it works fast on the local LAN but not Internet, then I do not think it
is an IIS issue at all. The LAN shows what happens when there is exactly one
network connection, hopefully 100Mbit or higher, and there is no unknown
network bottleneck.

IIS can definitely download and upload as fast as possible -- see
download.microsoft.com for evidence.

So, I would start looking at:
1. bottlenecks within the network layer itself
2. a slow ISAPI handler on the server that sends the file inefficiently

Neither are "IIS issues" -- networking issues is outside of IIS scope, and
custom ISAPI handler is not IIS code

Is the download via the IIS static file handler or some other custom ISAPI?
In other words, is the particular URL extension configured to be mapped to
some custom ISAPI handler (or the *-handler) or is it unmapped?

--
//David
IIS
http://blogs.msdn.com/David.Wang
This posting is provided "AS IS" with no warranties, and confers no rights.
//
"Jas Singh" <jasdeeps@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:%23K5Tc6scFHA.220@xxxxxxxxxxxxxxxxxxxxxxx
This speed for T1 is 1.5mg/seb up and down and dsl is 724 download. I am
hosting my server on our T1 that comes to hour office. so I am the ISP that
is hosting the web site for your partners. Now how can I get this IIS server
go faster. If I connect to the web server from the same lan as web server.
the download is faster. but for the users out on the internet, it is very
slow.

Please help me.


"David Wang [Msft]" <someone@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:%23GpytQrcFHA.584@xxxxxxxxxxxxxxxxxxxxxxx
> Your comparison only shows that the bandwidth issue is not due to any
> restrictions by your ISP on your browser. Your comparison of downloading
> from your IIS server and HP's website only proves that the network
> segments
> between HP and your web browser's computer is fast -- it says NOTHING
> about
> the network segments between your IIS server and your browser.
>
> What is the actualy downstream speed of the network that IIS is on? Have
> you
> ever measured it? Using terms like T1 and DSL really mean nothing -- what
> is the actual bandwidth that the ISP hosting the IIS server gives you?
>
> Are you running any custom server applications that install ISAPI Filters
> that filter the output (and hence kill performance), or is any ISAPI/CGI
> configured to handle the .ZIP download instead of the default IIS static
> file handler.
>
> I'm getting 300kb/sec downloading from my IIS on Windows 2000 Server for a
> large ZIP file off my internal network (some Intranet network throttling
> is
> going on). Obviously using the default IIS static file handler and no
> filters in the way.
>
> --
> //David
> IIS
> http://blogs.msdn.com/David.Wang
> This posting is provided "AS IS" with no warranties, and confers no
> rights.
> //
> "Jas Singh" <jasdeeps@xxxxxxxxxxxxxxxxxxxx> wrote in message
> news:eT4Wx0qcFHA.4040@xxxxxxxxxxxxxxxxxxxxxxx
> Hi,
>
> I am running the microsoft IIS on Windows 2000 Server. The site is very
> slow. I found out major slowness on IIS when I was trying to download some
> zip files that I have on out web site. They were in size about 10mb or
> 15mb.
> Connection to IIS site is by T1 and download side is connected with DSL .
> I
> was only able to download about 20 to 25kb / sec. but when I try to
> download
> a file form HP's web site I was downloading about 300mb / sec. There is a
> huge differece. Please help me out.
>
> Thanks,
>
>
>



.

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