Be a simple man
分类： 项目管理
2012-01-31 20:08:01
When loading data into BW, we need to specify which one of the following transfer methods to use:
PSA: With this method, data are transferred in the unit of packets as shown in Screen 4.10. This method uses the transfer structure defined for PSA, although it does not mean the data must stay there.
IDoc: With this method, data are transferred in the unit of IDocs (Figure 10.2). The data must stop by the ALE inbox before proceeding to their targets. This method has a notable limitation: The transfer structure cannot be wider than 1000 bytes in the character format.
For these reasons, the PSA method is safer and more straightforward than the IDoc method; its use is recommended by SAP. In this section we discuss how to size the data packet to improve load performance when the PSA method is used in data loading.
