Data cache

VSafonov

I have a fairly complex scripted dataset that does a few things:
1. FTPs log files from production server to a temp dir
2. Parses them into Vector (just like in the example...)

Then I create a join Data-set to merge log info to some database tables.

Then I have few charts built to show different perspectives.
I have noticed that my scripted data-set is being run for every chart(ftp, parse - all)

I want to be able to do that processing once per report run. Is there a way I could get this to work like this?

environment -
Eclipse Business Intelligence and Reporting Tools SDK
Version: 4.2.1.v20120820-8F8j7OFT0z0-TmCbQK30Qm
Build id: v20120912-1721

Clement Wong

In BIRT 4.2.1, it is now possible to configure whether the data engine caches a data set. You can read more about Data Set Cache Control @ <a class='bbc_url' href='http://www.eclipse.org/birt/phoenix/project/notable4.2.php#jump_11'>http://www.eclipse.org/birt/phoenix/project/notable4.2.php#jump_11</a>.<br />
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However, by default, it is set to true so it should not run your (scripted) data set multiple times.<br />
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In my testing, I have a scripted dataset that gets the current timestamp. The dataset is used in multiple tables and charts. If I set the "Needs cache for data-engine" setting to true, the timestamps are all the same timestamp value. If I change the setting to false, the timestamps change (thus the script data set is re-run for each).<br />
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Can you please check this setting in your design?<br />
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If this setting is true, and you still see the multiple run behavior, then please include either your design to look at your report structure, or include a sample the replicates the behavior you are seeing.