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From Ian Holsman <i...@cnet.com>
Subject Re: Streaming and a slow client
Date Thu, 30 Aug 2001 17:52:24 GMT
Brian Degenhardt wrote:

> This is a huge pain in my neck.  We stream/deliver mp3s through mod_proxy
> and if you've got some guy on a 14.4 dialup downloading a 10meg mp3, the
> backend server gets a connection tied up the whole time.
> 

not to mention the huge potential for DoS
(wouldn't even need proxy .. a simple CGI would do)


> It's tricky though.  For cgi accellerators, you can rely on your tcp buffer
> size to pull in the whole document.  However, you can't buffer 10 megs in
> ram  because you'd run out of memory with just a handfull of streams.
> What's needed is some sort of disk based buffering mechanism.


so we don't block on the client send?

> 
> Would something like this be useful for the distribution?  I've been playing
> with mods like this on the side, if you guys want I might be able offer a
> patch to accomplish this via a config directive.


I'd be interested in this.
it would stop us having to disable streaming

..Ian


> 
> On Wed, Aug 29, 2001 at 05:58:38PM -0400, Chuck Murcko wrote:
> 
>>On Wednesday, August 29, 2001, at 12:29 PM, Ian Holsman wrote:
>>
>>
>>>one of our developers over here came up with a interesting question.
>>>
>>>
>>>say we have a GET request which gets served from a CGI or proxy. and it
>>>is streamed/chunked out (which is the desired effect)
>>>
>>>now lets say I have a VERY SLOW connection.
>>>
>>>does this cause the server to hold onto the backend connection (ie..
>>>keep the CGI/proxy alive)  while the server is waiting for a response
>>>back from the client.
>>>
>>>
>>Yes, this is exactly what happens when you (mod_)proxy iTunes under Mac 
>>OS X. If the client connection is slow enough, it fails and rebuffers 
>>the stream periodically. But the backend connection stays open.
>>
>>Chuck Murcko
>>Topsail Group
>>http://www.topsail.org/
>>




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