Downtime-Optimized Conversion

Preprocessing

In the Preprocessing roadmap step, the Software Update Manager creates necessary data required for the uptime migration.

SUM creates

  • a consistent copy of all tables that are read or written by the conversion

  • all required Customizing, master data, and all application tables

The database triggers record the changes of all copied tables. SUM transfers all recorded changes to SAP HANA database. After the uptime migration has finished, SUM starts to replicate all recorded changes to SAP HANA until entering downtime.

The following actions are specific to the update with the downtime-optimized conversion:
  • Lock of Asset Accounting in Phase MAIN_SHDRUN/REQ_SMIG_APPL_LOCK

    In this phase, leading tables of Asset Accounting are locked by database freeze trigger to prevent new postings. Confirm the dialog by choosing Next.

    During the Asset Accounting lock, perform the following steps for the daily processes in Asset Accounting:
    1. Perform closing for periodic asset postings using report RAPERB2000 or transaction ASKB.
    2. Calculate the plan values for depreciation using transaction AFAR in the productive system. This means you can avoid RC errors during the migration.

    This Asset Accounting lock ends in phase MAIN_SHDRUN/REQ_SMIG_APPL_UNLOCK. Confirm the dialog by choosing Next.

  • Finance Customizing

    To support additional changes that were made after the inclusion of your Customizing request, proceed as follows :

    1. Log on to the application client of your update system with your business user. This can be the shadow instance, if your source database is already on SAP HANA, or the temporary instance in case of any other source database.

      Make sure to apply the changes in all necessary clients. Before doing that, unlock your update system.

    2. To perform the following activities in the update system, call transaction UPG_SFIN_CUST:

      • Migrate Material Ledger Customizing

      • Check Assignment of Material Ledger Types to Valuation Areas