Re: Performance Problems with Probing

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From: Jediah L. (rife_at_nospam.nospam)
Date: 08/20/04 

Date: Fri, 20 Aug 2004 11:39:19 -0400

So you would suggest a better setup is to open a single HTTP connection and
keep it open for the 10 hour working day?

I wonder why IE doesn't do the same thing if it is such a great way to do
it? (In our application, we both use IE - with embeded Win Form User
Controls - and we use .Net Win Form .Exe's both exhibit the same problem).

But seriously - I appreciate your response - and didn't really expect you or
anyone else to have an answer to #1 - its a flaw imo in the way microsoft
has implemented their authentication scheme.

Any thoughts on #2 and #3 would also be greatly appreciated!

Thanks!

"Jerry Pisk" <jerryiii@hotmail.com> wrote in message
news:exLxDoshEHA.3928@TK2MSFTNGP11.phx.gbl...
> IE does send two requests as well. And if you kept the connection open you
> could reuse it without having to send two requests all the time, so -
you're
> right, you have a poor setup in your application. You should have a
> connection pool that you'll use for your requests, instead of opening and
> closing a connection each time.
>
> Jerry
>
> "Jediah L." <rife@nospam.nospam> wrote in message
> news:%23pw15CshEHA.1344@TK2MSFTNGP11.phx.gbl...
> > In re #1:
> >
> > Don't really understand why though - its a poor setup - and should be
> > configurable.
> >
> > If you know NTLM was used for the first request - why not automatically
> > use
> > it for the second request - and if its used for the first half a million
> > requests - why not use it for the next half a million.
> >
> > Or why couldn't you tell the IE configuration [This site is always
NTLM].
> >
> > Seems like a waste in performance and bandwidth.
> >
> >
> > "Jerry Pisk" <jerryiii@hotmail.com> wrote in message
> > news:uS%23CB$nhEHA.2848@TK2MSFTNGP10.phx.gbl...
> >> 1. You can't. NTLM (and pretty much every authentication scheme except
> >> basic) requires at least two requests.
> >>
> >> 2. and 3. - Don't know...
> >>
> >> Jerry
> >>
> >> "Jediah L." <rife@nospam.nospam> wrote in message
> >> news:u5fRIhlhEHA.3928@TK2MSFTNGP11.phx.gbl...
> >> > 1. In our application which uses NTLM; .Net always requests a file
as
> >> > Anonymous before requesting it using the NTLM authenticated
> > credentials -
> >> > in
> >> > an application with over a million hits a day - this is quite a bit
of
> >> > extra
> >> > posting going on. Anyone know how to stop this?
> >> >
> >> > 2. Even when supplying a probing hint in the web.config file; our
.Net
> > Win
> >> > Form embeded user controls probe 6 times before finding the file (the
> >> > first
> >> > 4 are variations of the file with .dll, and .exe names in /bin and
> >> > /root
> >> > folders, the last 2 are ANON then NTLM requests for the correct
file).
> >> >
> >> > So for each of the 3000+ users - for each file requested - there is
> >> > approximatly 6 web requests handled on the server - this causes
> >> > slowless
> >> > in
> >> > the client application - and causes additional work for the servers.
> >> >
> >> > 3. Just recently all of our Smart Downloads have stopped working. I
> > have
> >> > put a sniffer on the machines - and checked the IIS logs - the CLR
has
> >> > stopped doing conditional gets (No If-Modified-Since headers) and IIS
> > (of
> >> > course) is always responding by sending a 200 (after the initial 6
> > probes)
> >> > and resending the files each time - instead of responding w/ the
304's
> > and
> >> > allowing the .Net download cache to do its work.
> >> >
> >> > I've already went through a long list of trying things - however -
i'm
> >> > running out of ideas - i'd appreciate any thoughts!!!
> >> >
> >> > Thanks!
> >> >
> >> >
> >>
> >>
> >
> >
>
>

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