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dode888
Joined: 29 Jan 2008
Posts: 4
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 Posted: Tue 29 Jan '08 19:18 Post subject: Returning large binary files - throttled? |
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I'm new to Apache, on Windows 2003 Server.
Our application, OpenInsight, returns .pdf files. The files shorter than about 2MB transfer quickly. However, those larger usually fail.
Is there some setting that can be changed so that our large files will be transfered?
Thanks,
Dave |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7371
Location: Germany, Next to Hamburg
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| Posted: Wed 30 Jan '08 11:21 Post subject: |
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Which version of Apache do you use? How large are that files? Apache 2.0 supports files up to 1.99 GB. Apache 2.2 now supports lager files.
Anything in your error log? How do you init the transfer? By a script? |
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dode888
Joined: 29 Jan 2008
Posts: 4
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| Posted: Wed 30 Jan '08 19:25 Post subject: |
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Apache version 2.2. Files over 2MB are slow or not transfered. They can be up to 20MB.
I saw nothing in the error log.
The transfer is via http from my OpenInsight program (cgi). |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7371
Location: Germany, Next to Hamburg
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| Posted: Thu 31 Jan '08 10:30 Post subject: |
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| I'm not used to cgi, but maybe there is a timeout? Or resource limit? |
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dode888
Joined: 29 Jan 2008
Posts: 4
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| Posted: Fri 01 Feb '08 19:39 Post subject: |
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That's what I'm asking about... a timeout or a resource limit.
I suspect that there is a timeout setting about cgi. Since the http server executes the cgi program it has to eventually provide a response to the browser. If the cgi program stops or takes too long to respond, then the http server can provide some explanation.
I don't get an explanation from apache. I'm trying to move from Sambar where these is an actual explanation "Maximum execution time" exceeded.
So, what/where is the apache setting that sets the corresponding limit?
Tx |
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glsmith
Moderator
Joined: 16 Oct 2007
Posts: 2268
Location: Sun Diego, USA
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| Posted: Fri 01 Feb '08 20:04 Post subject: |
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The timeout wouldn't be in the cgi, the cgi only initiates the actual file download.
About how long in the download does the timeout occur?
There is the "TimeOut" directive, which is set at 5 minutes.
It's a multi-purpose directive so the docs state.
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The TimeOut directive currently defines the amount of time Apache will wait for three things:
1. The total amount of time it takes to receive a GET request.
2. The amount of time between receipt of TCP packets on a POST or PUT request.
3. The amount of time between ACKs on transmissions of TCP packets in responses.
We plan on making these separately configurable at some point down the road. The timer used to default to 1200 before 1.2, but has been lowered to 300 which is still far more than necessary in most situations.
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So if your downloads are dying at 5 minutes, may be worth looking into.
I listen to my mp3 files at work served through my Apache, I know I am getting files as large as 16.5MB down no problem. I am not sure it takes longer than 5 minutes for the file to transfer however. I have one that is 27MB but not sure I've ever encountered that one at the office. |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7371
Location: Germany, Next to Hamburg
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| Posted: Fri 01 Feb '08 21:16 Post subject: |
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| glsmith wrote: |
I listen to my mp3 files at work served through my Apache |
Doesn't the program download the file? A normal download program sends a keep alive request, doesn't it?
Or did you install a streaming module?
So long
James
Support for more than 2 GB |
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glsmith
Moderator
Joined: 16 Oct 2007
Posts: 2268
Location: Sun Diego, USA
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| Posted: Sat 02 Feb '08 8:56 Post subject: |
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flash mp3 player with a perl jukebox script
yes, the flash player downloads the file , I doubt it has a keep alive built in since the player is nothing fancy. I do not see any difference whether a flash player downloads or a browser downloads, the file can only download as fas as bandwidth allows.
No special module in Apache. |
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dode888
Joined: 29 Jan 2008
Posts: 4
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| Posted: Sat 02 Feb '08 23:35 Post subject: |
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Sorry. After all this I talked again to tech support on the cgi program, and we found a memory limit had been exceeded in their software. And it was not reporting the problem.
So, Apache may not be the problem.
Thanks all. |
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