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XI and Large Message Processing - should we use XI of not?

We have a scenario where the legacy SAP system has allot of data extraction programs that download files and ftp them somewhere. These files range from anywhere between 10MB and 350MB in size.

We are upgrading to ECC6 and XI. We need to send the data from the abaps to XI then out using the file adapter.

Our testing has shown that once we start processing messages above approx. 25MB that XI grinds to a halt (java out of memory, cpicerr, etc). These messages actually convert to around 100MB when wrapped in XML. And this happens on the transfer of the message from ECC6 to XI - we haven't even got to the file adapter yet. We are using ABAP proxy to transfer the data which seems to be able to handle the large sizes much better than RFC.

I've gone thru all the previous forum posts about increasing the heap size etc, but my question is more architectural - ie. should we use XI for these types of data extracts?

There is a weblog (/people/ that mentions you can send any files through XI without mapping and without repository objects by simply using a receiver determination and the file adapter. We have also tested this and notice that even though processing is much quicker - the adapter engine is still slowed down and if we have several of these processing at once we're unsure of the consequences! We only tried with a 60MB message as well.

Michal Krawczyk mentioned in a comment that it would be better to use a java proxy with some java code to copy or ftp the files instead - BUT... is it even worth using XI in this case - what does it add?


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  • Best Answer
    Posted on Jan 18, 2007 at 07:34 AM


    <i>BUT... >s it even worth using XI in this case - what does it add?</i>

    I agree with you. If XI is going to add as a mere FTP then what is the point of using XI in such interfaces? One can always install a FTP server and use one instead!

    Most of the times, it becomes a case that the client has an XI box and does not want to install a FTP server and so wishes XI to pick the file and push it across to some other location. it doesnt make much sense I agree , but such things actually do prevail in real time projects as well , unfortunately!



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    • Former Member

      Hi Bhavesh,

      _*When there is an error , corresponding error page should be displayed instead of whole stack trace.

      *_I want to achieve this with CE 7.1 EHP1.

      To cary out this I am not finding HTTP property ServiceUnavailableResponse and Webcontainer property ApplicationStoppedFile in nwa system configuration.

      Please can you help to know how to get this properties in nwa .

      It is urgent.



  • author's profile photo Former Member
    Former Member
    Posted on Jan 18, 2007 at 07:48 AM


    use of XI migth help you have features like centralized monitoring , de-coupling of systems which are highly desirable in complex system landscapes.

    Agreed though you cant have something in place which gives you poor performance in case of high data volumes but you can always think of alternatives as suggested by Michal...say in this case there would be a single technology layer between your file and the Java proxy and it would be using standard java io functionalities and the performance has got to be better...FTP using file adapter will have multiple technologies / protocols involved i.e. FTP protocol + File Access + Adapter Engine in Java + Integration engine layer in ABAP and so can see that the parties involved in the over all data transfer increase in number...

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