SAP Technical Upgrade Essentials and considerations
Upgrade Driving Factor:
SAP version / Enhancement Pack upgrade generally required on below scenario:
These are the primary driving factor for any SAP Upgrades.
Planning, Pre-requisite and Prior activities:
Following consideration is required for any successful upgrade within feasible timeline:
Infrastructure and platform study needs to done using the SAP product availability matrix (PAM). Using SAP PAM we can check the availability of newer SAP on specific OS and Database version. Below attached is the sample screenshot of SAP PAM (https://service.sap.com/pam).
To know any upgrade dependencies between systems in SAP landscape SAP UDA online tool can be used to check SAP component dependency. SAP UDA tool is accessible via two ways:
This will help in:
Below sample dependencies can be generated using SAP UDA tool.
Using above results we can develop phasing concept in upgrade phase. We need carry out an analysis of the systems to be upgraded to determine the inter-dependency between the various system components to be upgraded. Sample analysis is highlighted below:
The outcome of the mapping will help in identifying the systems which are not dependant on the others, and hence theoretically can be upgraded on a separate track independently.
SAP Upgrade Tools and Upgrade strategy
SAP Software Update Manager (SUM) is a multi-purpose tool, which supports following processes related with Upgrades:
The Software Update Manager checks the consistency of planned change and technical system where the change should be applied.
The current version of the Software Update Manager replaces well-known tools for SAP enhancement package implementation and upgrade
SUM Key Features Includes:
Deciding Upgrade strategy
The upgrade strategy is one of the main factors in determining how much downtime is involved. The SAP SUM tool offers following two update strategies :
Downtime minimization strategy using shadow instance technique of SAP’s Software Update Manager (SUM) tool is used to reduce the downtime during the Upgrade process. The Process overview report generated from SUM Tool during Test and Pre-Prod upgrades will also help in estimation of downtime required during the production upgrades.
Following are the major consideration of downtime minimization:
·
SAP SUM tool provides standard & advance options for Downtime Minimization based upon the shadow instance process:
Below depicted diagrams are showing the in-built features of SAP SUM tool on up-time and downtime period during the exection of
upgrade process using Standard and advance optiions of SUM tool.
SUM Standard Option for Downtime Minimization :
Below diagram discribes uptime and downtime processes in standard downtime minimization option of SUM tool.
SUM Advance Option for Extensive Downtime Minimization:
Below diagram discribes uptime and downtime processes in advance downtime minimization option of SUM tool.
Temporary increase of approx. 10%. in CPU & RAM and additional DB Storage of around 20-25% will be required for Shadow-technique to minimize downtime. However this needs to be analysed during the assessment/preparation phase of the project.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
User | Count |
---|---|
8 | |
7 | |
5 | |
4 | |
4 | |
4 | |
4 | |
3 | |
3 | |
3 |