on 02-05-2009 4:31 AM
Can any body expalin the steps for SAP upgradation
There are a lot of steps involved in an upgrade project i'll try to make a summary for a typical R3 Upgrade
1.- Pre Upgrade Activities
Backups
Users Passwords
Prepare the neccesary software for the upgrade
2.- Prepare Activities
Parameter input
Initialization
Import *** AVOID ANY TRANSPORT IMPORT (STMS & TP) ****
Extension
Integration
Installation
General Checks
Activation Checks
Necessary checks for convertions
Optional checks for convertions
Modification Support
Pre-processing
Post-Prepare
Correct Inconsistent function groups - folio 9000
Evaluating the Results of PREPARE
Preparations for DB
Preparations for SAP
3. Upgrade Online
Start SAPup
Import and modification transfer
Shadow System Installation
Complete all CTS projects
Close all projects
Dictionary Modification Adjustment (SPDD) Start activation
4. Perform R/3 Upgrade
Phase 1 : Swith tables and Kernel
Stops SAP system and changes profiles
Starts SAP system
Deletes triggers
Deletes inconsistent values from tables
Checks whether outstanding updates tasks and queued RFCs exist
Stops SAP system
Activates nametab entries for external conversions
Switches to new Repository
Creates SAP Web Application Server views
Adapts switched nametab entries for database objects to the target system
Switches SAP kernel
Imports (a small number of) table entries needed to start the system with the new SAP kernel
5. Phase 2 : Convertion, Main Import, XPRAs
Starts SAP system
Generates statistics for tables in transport management
Copies entries from shadow tables to original tables
Imports requests for porting-specific modifications
Check, if index pre-creation was succesful
Converts application tables and activates their nametab entries
Stops SAP system
Converts application views and activates remaining nametab entries
Starts SAP system
Cleans up table DBDIFF in the database
Stop SAP system to speed up import
Imports entries into control tables
Interaction
Updates statistics for certain tables
Starts SAP system
Import of additional transport requests
Checks if current structure extensions collide with the DDIC enhancement category of the target release
Interaction
Sets required syncmarks
Executes AIMs in advance in order to avoid errors in XPRA phase
"Executes XPRAs
If errors occur, repeats phase automatically"
Sets the status of the installed languages
Updates status information for imported Support Packages
6. Phase 3: Post Processing
"Checks prerequisites for production operation
Activates CMOD enhancements"
Cleans up nametab, database, screen sequence control
Phase for dual stack
Switches SAP kernel
Change the start profile, if the next start fails check the profiles.
"Stops SAP system and resets profiles
MaxDB: If archiving is deactivated, prompts you to create database backup"
calls spau fuba
Restore saved variants
"Prompts for post upgrade activities
Correct P errors before you start production operation
Save Logs"
Stores the upgrade evaluation in the database for reference
7. Post Upgrade
I hope that this quick reference be usesfuel
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You don't need an explanation... you can find the Upgrade guide at SAP Marketplace.
http://service.sap.com/upgrade.
Regards
Juan
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