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From Chris.Br...@scotland.gsi.gov.uk
Subject RE: FOP Scalability
Date Fri, 10 May 2002 11:46:03 GMT
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I realise that more servers could be an answer, but unfortunately this is
not likely to happen
Is there a way to limit the memory allocation that FOP uses. 
(but then that poses the problem of what to do if we run out)
It is imperative that the FOP does not fail, as it generating recipts to our
Answers on a postcard ...

-----Original Message-----
From: Jeremias Maerki [mailto:jeremias.maerki@outline.ch]
Sent: 10 May 2002 12:42
To: fop-user@xml.apache.org
Subject: Re: FOP Scalability

You could have additional servers (can be low-cost) and use JMS to post
jobs to a queue. These additional servers will listen on the queue
(automatic load-balancing through use of JMS), generate PDFs and send a
message back that the file is ready to be taken by the front servlet.

> I have FOP 0.20.3 running successfully on my web server and was wondering
> what the best way to control the scalability of it. There is a possibility
> that 30 + users may be requesting a PDF page at the same time and as you
> know FOP is not too kind on memory usage. The PDF being produced are only
> pages max so its just the cost of the processing on the web server that is
> the problem. 
> I have seen ideas about limiting the number of FOP processes running at
> time but I dont want to have users waiting for minutes for their PDF page
> be displayed. 
> Does any one have any other ideas ?

Jeremias Märki


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