SUM TOOL.

 SUM Having mainly 6 steps,

• Extraction
• Configuration
• Checks
• Preprocessing
• Execution
• Postprocessing

1.Extraction 

• DDIC username and password
• Identify database & SAP version
• Checks the stack xml file
• Scanning of download directory where all the patches are placed
• Extract files to move to EPS/in
• Check SPAM version. Skip this if SPAM is already in latest version
• <SID>ADM credentials
• Pre-upgrade S-note list implementation
• Checks if the source and target system is valid for update
• Checks SAP system release
• Checks the system profiles

2. Configuration

• Input parameters for type of upgrade (downtime optimizes, higher complexity, high resource assignment)
• Keep database archiving on
• Execution strategy for transaction SGEN
• Maximum number of processes to be used for load generation. SGEN Processes
• Batch Process(Uptime) & Batch Process(Downtime)
• Maximum number of DDL processes (Uptime and Downtime)
• Number of parallel import processes (R3trans -Uptime and Downtime)
• Parallel Phases (Uptime and downtime)
• Update Instances
• Enhancement package inclusion
• Add-On selection
• Modification Adjustment (SPDD transport request and SPAU transport request)

3. Checks

• Space check in database, if space is Insufficient then extend tablespaces with script
• BW checks and phases
• Activation and conversion checks
• Modification support
• Preliminary upgrade processing
• List Locked SAP objects

4. Preprocessing 

• Check for locked objects
• ABAP Workbench locking
• Run shadow system for preparation of new release (ACT_UPG, PARDIST, SGEN)
• SPDD Adjustments
• Downtime Starts

5. Execution

• Merging of shadow and Real Instance
• system upgrade
• Table conversion
• Downtime Complete

6. Post-processing 

• SPAU change
• Backup
• Create folder in trans directory (EHPi)