XCOM Data Transport

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  • 1.  Tech Tip for XCOM: Transfer large files and SMF-Records

    Posted May 20, 2016 08:08 AM

    When using SMF-Records for XCOM transfers it might happen that for files having a size larger than 4GB that size is displayed incorrect in the SMF-Record.

    The size ("NUMBER OF UNCOMPRESSED BYTES") is stored in field SMF#UNCB of the SMF-Record. As this field has Fullword-length it cannot contain entries larger than 4GB. For that new field SMF#UNC2 ("NO. OF UNCOMPRESSED BYTES EXT") was created. This field is incremented by one every time field SMF#UNCB overflows. So when you interpret both fields SMF#UNC2 and SMF#UNCB as one field of two Fullword length you have the correct size.



  • 2.  Re: Tech Tip for XCOM: Transfer large files and SMF-Records

    Posted May 20, 2016 08:09 AM

    The same is true for the number of compressed bytes. Here you have field SMF#CMPB ("NUMBER OF COMPRESSED BYTES") and field SMF#CMP2 ("NO. OF COMPRESSED BYTES EXT") if the size does not fit into SMF#CMPB alone.

    So when you interpret both fields SMF#CMP2 and SMF#CMPB as one field of two Fullword length you have the correct number of compressed bytes.