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New Directory Structure in SAP NetWeaver 7.5 ABAP Installation

In the latest SAP NetWeaver 7.5 release, there have been significant changes to the directory structure for ABAP instances. This article discusses the modifications and how they impact the Primary Application Server (PAS) and Additional Application Server (AAS) instances. Users noticed that the ABAP Primary Application Server (PAS) instance directory, previously named DVBEMGS<Instance_Number>, is no longer present in the directory /usr/sap/<SID>. Instead, a structure named D<Instance_Number> (e.g., D00) similar to an Additional Application Server (AAS) is now found. With the introduction of the ABAP SAP Central Services (ASCS) instance, the distinction between the ABAP PAS and AAS has been removed. This modification resulted in the adoption of the D<Instance_Number> format for all application server instances, regardless of whether they are PAS or AAS.

Example of a new ABAP SAP System based on NW 7.5:

– PAS: D10
– AAS: D13
– AAS: D15

Important Points to Note:
1. The instance directory name for both PAS and AAS is now D<Instance_Number>.
2. Reverting to the old directory naming structure is not feasible.
3. This new directory structure applies only to fresh installations of SAP NetWeaver 7.5 and not to upgraded systems.
4. The changes do not apply to Java or Dual Stack Systems.

What is Heterogeneous System Copy in SAP?

In SAP, a heterogeneous system copy refers to the process of copying an SAP system from one platform or database to another. It involves migrating an SAP system from its existing environment to a different hardware platform or database system. The term “heterogeneous” indicates that the source and target systems have different characteristics, such as different operating systems or database management systems.

A heterogeneous system copy is typically performed when there is a need to move the SAP system from one infrastructure to another or when there is a requirement to upgrade the underlying technology stack. For example, it may involve moving an SAP system from an older version of the operating system to a newer version, or from one database management system to another.

The process of performing a heterogeneous system copy involves several steps and considerations. Here is a high-level overview of the key stages:

  1. Preparing for the System Copy:
    • Analyzing the existing system landscape and identifying the target platform and database system.
    • Reviewing hardware and software requirements for the target system.
    • Ensuring compatibility between the source and target systems.
  2. Exporting the Source System:
    • Performing a system backup of the source system.
    • Exporting the database contents and system-specific files from the source system.
  3. Preparing the Target System:
    • Setting up the target system infrastructure, including the installation of the operating system, database system, and other prerequisites.
    • Configuring the target system to match the specifications of the source system.
  4. Importing the Source System to the Target:
    • Importing the exported data and system files into the target system.
    • Configuring the target system to ensure compatibility with the imported data.
  5. Post-Copy Activities:
    • Performing system checks and validations to ensure the integrity and consistency of the copied system.
    • Adjusting system-specific settings and configurations.
    • Testing the system to ensure its functionality and performance.

It’s important to note that a heterogeneous system copy is a complex process that requires careful planning and execution. It involves technical expertise in both the source and target platforms, including knowledge of operating systems, database systems, and SAP system administration. Additionally, it’s crucial to consider factors such as system downtime, data consistency, and potential impact on other integrated systems during the copy process.

SAP provides documentation and tools to assist with the heterogeneous system copy process, such as the Software Provisioning Manager (SWPM) and guides specific to the source and target systems involved. It is recommended to consult these resources and engage with experienced SAP consultants or administrators to ensure a successful system copy while minimizing potential risks or disruptions to the SAP landscape.