Stopping the Source System

Log in to SAP and lock all accounts except the DDIC and hand system accounts in the SU 10 mode.
Create a test user in PFCG.
Suspend backend tasks on SAP.
Stop applications in the source system.
Log in to the PAS/AAS server as an application user and run the sapcontrol -nr [Instance ID] -function Stop command to stop PAS and AAS.

Log in to any ASCS/ERS node as the root user and run the service pacemaker stop command to stop ASCS and ERS.
Shut down the source database. Ensure that no other services directly read data from or write data to the HANA database after applications are stopped.
Log in to the target database as a database user and run the following command to stop data synchronization with the source database:
```
hdbnsutil -sr_unregister
```
Log in to the source database as a database user and run the following command:
```
HDB stop
```
Change the IP addresses of the source servers.
Log in to the HUAWEI CLOUD management console and change the physical IP addresses of the primary and extension NICs of the five source servers to temporary IP addresses.

Note: Before changing the IP addresses of the primary NICs, ensure that the servers are shut down.