BW 3.5 - Update to PSA only / Read PSA and Update Data Target

Question

Hi Folks,
I am planning to use on a  BW 3.5 data source and infopackage that loads to PSA only (as the source system job runs quite long and we would run other prepration loads in parallel before pushed to final cube). And then later in the process chain the process Read PSA and Update Data Target to load the data to final cube.
As we plan to run the process chain 3 times a day I was wondering if the Read PSA and Update Data Target always takes only the latest request loaded to the PSA (as it is always the same infopackage) or do we have to delete the PSA request at the end of each process chain run so that not the next run will load the PSA request again as it is still in the PSA?
Thanks for all replies in advance,
Axel

Answer 1

You are loading the Delta till the PSA, multiple times a day, and after each update to the PSA you will send the data to the Cube.
Once its there in the PSA, you are performing further tasks & then updating the cube multiple times (once after each delta)
Well, the 1st load to the cube should be OK.
But, from the next load onwards, it would pick up all the requests from the PSA & you will have wrong values in the Cube.
Because, i think, while using 'Read PSA & Update the Target', you can't set it for a FULL or a DELTA load.
It will bring in everything that exists in the PSA.
I would advice you to clean the PSA before the starting next Delta.
But, there is a counter argument.
If the data mart sign is reflected in the PSA for the request that has been loaded into the cube, then the next time the system will pick up the request which does not have a data mart symbol.
You can always give this a try in your Dev system.
Edited by: Vishal Sanghvi on Apr 1, 2011 1:58 PM