Chart Caching

[ColdSteel2]

I just move my server from Windows 2003 to Windows 2008 64 Bit running IIS7.  I am runninf Coldfusion9.  On the new server, all the chart are disappearing from the cache (\ColdFusion9\charting\cache) after a few seconds.  This makes them un-printable for IE users.  In the administrator/Charting I have the following settings:

Cache type: Disk Cache

Maximum number of cached images:51

Maximum number of charting threads:4

Disk cache location:E:\QIS\ColdFusion9\charting\cache

These are the same as my previous Win2003 32 server.

The old server, did not ever delete any thing from the cache directory.

How do I get the files to stay in the Cache directory for a reasonable amount of time (5 minutes).  The number images in the directory while never gets above 4.

[recursivecodes]

I'm not sure how to extend the cache - or if it's possible, but you can always use the 'name' attribute of the cfchart tag along with the image manipulation tags/functions in CF to write your own image to disk (temp file, whatever...).

Here's a quick example:

http://pastebin.com/vTrEkhjY

[recursivecodes]

To build on my last example, if you're using a modern browser that supports it you can even do this:

<cfoutput>
    <img src="data:image/jpg;base64,#toBase64(chartImg)#" />
</cfoutput>

[recursivecodes]

Actually, you don't even need to use imageNew() if using base64()... this would work:

<cfchart xaxistitle="Department" yaxistitle="Salary Average" format="jpg" name="myChart">
    <cfchartseries type="bar" query="DataTable" itemcolumn="Dept_Name" valuecolumn="avgSal"><cfchartdata item="Facilities" value="35000"></cfchartseries>
</cfchart>

<cfoutput>
    <img src="data:image/jpg;base64,#toBase64(myChart)#" />
</cfoutput>

[ColdSteel2]

Thank you for the help.  Unfortunately, this does not solve my problem for two reasons.

1)  I would have to change every script on my site that produces a chart.

2)  using this method, the image map that is created when the url Attribute no longer creates an image map.