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File Input Node

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kimbert

Posted: Thu Feb 05, 2009 2:22 am Post subject:

Jedi Council

Joined: 29 Jul 2003
Posts: 5543
Location: Southampton

We are taking time to help you, so please take time to respond to the points which we raise.

Quote:

Processing time varies with the size of the file

Yes, of course. But does it vary linearly with the size of the file?

Quote:

But i have another flow with the same type of nodes and it process 4-5MB file in 3-4 minutes, thats what i expect from this flow too

Why do you expect that? Does the other message flow use the same type of MRM message definition? Same message style? Same type of processing in its Compute node ( if it has one )?

Quote:

The code i used earlier to create the output using Refernce for Output.MRM creats a 0 byte file

Then you are (obviously) building a different output message tree. You should use Trace nodes and user trace to find and fix your defect.

Quote:

This technique would seem like a good idea if you are not already doing something similar: http://www.ibm.com/developerworks/websphere/library/techarticles/0505_storey/0505_storey.html

Did you read this? Are you building the entire input tree and holding it in memory?

General advice:
1. Fix your revised code so that it no longer creates 0 byte output. Check the performance ( it might go faster when you have fixed the defect ).
2. Replace the Compute node with a really simple one that creates a tiny output message in the XMLNSC domain. Set Parse Timing to Immediate on the input node. This message flow will test the parsing speed. If it still takes 30-40mins to process the input file, then there is no point in tuning your Compute node ( but the link which I posted might still be useful ).

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