SAP Netweaver Technology 7.0 & SAP Business Suite 7 Overview:
The latest version of SAP's ERP is Business Suite 7 which was released on May 5, 2009. It contains ERP 6.0 with EhP4 (Enhancement Package 4), CRM 7.0, SCM 7.0, PLM 7.0, SRM 7.0 and running on SAP Netweaver 7.0 Technology. The Netweaver Application server can be implemented by using either ABAP or Java or both(Dual stack) which depends on the usage and Customer requirements. The types of Netweaver AS (Application Server) are discussed below.
Single Stack system:
The single stack system is a SAP system with either Netweaver Application Server ABAP or Netweaver Application Sever Java as base unit on which the other SAP modules and supporting third party tools will function. Eg.: A portal running on NW AS Java unit.
Dual Stack system:
In dual stack system both SAP NW AS ABAP and NW AS Java will be used as base units which helps other modules to run on it. The classic example of dual stack system is SAP Process Integration(PI).
Separated Stack system:
Separated stack system is slightly different from dual stack, in which the both Application Severs will be used but in separated systems i.e. the ABAP based modules and tools will run in NW AS ABAP server and Java based modules and tools will run in NW AS Java Server. To put in simple words, both servers will be used but in different systems. After the release of SAP BS 7.0, this type of stack is recommended by SAP
Eg.: Business Integration Scenario - BI ABAP based modules in BI NW AS ABAP server and BI Java based modules in BI NW AS Java server
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