Using the Migration Repetition Option for Testing

The option Migration Repetition allows the repetition of the downtime migration for testing purposes.

Context

To optimize the SUM with DMO procedure, it is necessary to manually adapt some parameters such as the number of R3load processes to the performance of the application server, and to repeat the migration afterwards. However, the Reset Option only allows the reset of the complete procedure. This means that all check and preprocessing phases will have to be passed again during the next run.

The option to jump back to the beginning of the downtime migration offers a fast test cycle by repeating the downtime migration phase only. This way, the repeated migration will start from the beginning with the number of R3loads you detected as optimum. In addition, SUM will consider the table duration files from the previous run for the table split calculation automatically (see for more information: Performance Optimization with Migration Duration File).

You deal with the Migration Repetition option in the following dialogs during the run:

Procedure

Dialog Migration Parameters during the initial dialogs sequence after the start of the Software Update Manager:

You select in this dialog in section Migration Repetition Option the option Enable migration repetition option. As a result, SUM stops after the downtime migration phase and displays an additional dialog that allows you to repeat the downtime migration (see step 3).
Dialog Preparations for Downtime (phase DOWNCONF_DTTRANS)

If you have enabled the Migration Repetition Option, this dialog displays an additional warning that the SUM will stop after the downtime migration phase and allows you to repeat the phase. Be aware that you must not use this option for a productive run.

Note

if you want to disable the option now, set the following parameter in the file SUM\abap\bin\SAPup_add.par:
/migrate_option/OPTIMIZECLONING = 0
The file SAPup_add.par is located in the subdirectory bin of the SUM directory. If this file does not exist yet, create it manually.
Dialog Test cycle (after phase EU_CLONE_MIG_DT_RUN)

If the Migration Repetition option is still enabled, SUM displays the dialog Test cycle after the downtime migration phase in which you are asked if you want to repeat the phase.

Select Yes, if you want to initialize the downtime migration again and repeat it. As long as the Migration Repetition option is enabled, this dialog is shown after the downtime migration again and offers the possibility of another test cycle, if desired.

Select No, if you want that the DMO run continues without any additional dialogs or steps related to the test cycle.