System Move: Data Transfer

During the SUM with DMO run including system move, you transfer the SUM directory data to the target host using either a serial or parallel transfer mode.

During phase HOSTCHANGE_MOVE_SOT, SUM displays the dialog DMO with System Move: Data Transfer. This is the first point in time to trigger the SUM directory content transfer from the source system landscape to the target system landscape.

Note

To avoid that SAP Host Agent cannot start the SAPup later on, keep the following in mind:
- Do not use user root to transfer the SUM folder, use the <SID>adm user instead.
- The SUM directory must not exceed 25 characters. You may use a symbolic link.
Unix only: The shell script for the data transfer runs in the background as a daemon process and is monitored by the HTTP server. In this way you can control the process in the Process Control Center. Furthermore, the Failed Daemon Processes flag on the SUM UI informs you when the process aborts or fails.
For more information, see in the SUM Guide in 2 Introduction The Software Update Manager the following sections about the
- Process Control Center: SUM Utilities (Extended UI) Process Control Center Process Control Center (Background Process Monitor)
- Failed Daemon Processes Flag: SUM UI: Flags Failed Daemon Processes Flag

Serial Data Transfer Mode

If you opt for the serial data transfer in phase HOSTCHANGE_MOVE_SOT, you can choose Next to continue with the DMO procedure on the source host. SUM exports then all files to the file system. As soon as SUM reaches the phase HOSTCHANGE_STOP, you are prompted to manually transfer at once the SUM directory including all files to the target host. After the transfer, you can continue with DMO procedure on the target host. See below a graphical overview of the DMO with System Move and serial data transfer mode:

Parallel Data Transfer Mode

If you opt for the parallel data transfer in phase HOSTCHANGE_MOVE_SOT, transfer the SUM directory including all files to the target host. Then you continue the DMO procedure on the source host. SUM starts to create export files that you copy to the target system.

Meanwhile, you start SUM with DMO on the target host in parallel to the current SUM with DMO procedure on the source host. The SUM in the target system landscape starts the import of the copied files, while other export files are still being created on the source system. This means that one SAPup executable on the source system landscape works (export) parallel to one SAPup executable on the target system landscape (import).

In addition, you have to synchronize manually directories that are listed on the dialog DMO with System Move: Data Transfer in phase HOSTCHANGE_MOVE_SOT. Flag files are used to notify the SAPup in the target system landscape about which files are ready to be imported.

You can continuously synchronize the directories. Perform a final synchronization, as soon SUM has reached the phase HOSTCHANGE_STOP.

See below a graphical overview of the DMO with System Move and parallel data transfer mode:

Unix Only: Parallel Data Transfer Mode Using a Script

The SUM provides you with the script dmosystemmove.sh for an automatic transfer of the files. For it, enter the target host name in the appropriate field of the dialog DMO with System Move: Data Transfer in phase HOSTCHANGE_MOVE_SOT.