SAP Data Migration – SAP LTMC and LTMOM / LSMW vs LTMC
SAP Data Migration – SAP LTMC and LTMOM
Today we are discussing SAP Data Migration using SAP LTMC and how to use LTMOM for extended customization here.
When We are Implementing the SAP S/4HANA solution, we can migrate our master data and business data from SAP systems or non-SAP systems to SAP S/4HANA. By using SAP S/4HANA migration cockpit.
In past, I have covered different Data Migration Approaches in the following blog post, that covered LTMC detailed steps using file-based approach Master data migration
Let’s get into today’s actual topic:
LTMC is a newer version/ enhanced version of LSMW
- LSMW – Legacy System Migration workbench
- LTMC – Landscape Transformation Migration Cockpit
For the Master/Transactional data transformation, we used to use LSMW from legacy systems like ECC, any other ERP or tally, whatever data like a cost center, profit center, bank, G/L account, BP.
When we have more data, we cannot do this one by one manually (definitely not 😉 ) – so we use a tool like LSMW in past.
And now we have an enhanced version called LTMC.
Note: we do have LSMW still exist in SAP, but not recommended by SAP nowadays.
Well, Data migration using LTMC can be achieved in 2 ways.
- File-based approach
- Staging tables approach
Here are the pros and cons, prerequisites on high-level:
|Size Limit||160MB limit for SAP S/4HANA Migration Cockpit*||No Limit.|
|System Considerations||None.||The staging system uses an SAP HANA database.|
|Data Provisioning||Enter data manually in each Microsoft Excel XML file.||Fill tables manually or by using preferred tools (for example Data services, Syniti).|
What is LTMOM
LTMOM – Migration Object Modeler
where it is useful?
Scenario: there are few customization fields that must add, the LTMC can’t help and LTMOM has come to the rescue of the situation here.
Open the same project in LTMOM and double click on the Source Structures. This will show you the list of fields already added to the migration template. All of them may not be visible in the template.
LTMOM will allow us to create additional fields and customization fields in the source structure and, mapped to the target structure.
Here are the steps:
- Step1: Go to LTMOM tcode, select the project and data object to add additional/customized fields.
Steps 2: Select the Project
Go to the Source structure and click ADD FIELD:
enter the Field name, data type and length, other details as shown below:
Step 7: wait for the generation:
Note: Here we need the ABAPer to add the same field name in the target system Structure as well.
Step 8: Go to LTMC screen:
Select the Proj
Go to the data object in the project
Step 11: Go to Template and download
Check if the added/customized fields in template:
And then, Go to Source and target structures for mapping:
and, once finished – fill the template and simulate the process and load the data to the target:
In the next blog, will see how to deal with staging tables.
In the next blog posts, we can discuss more processing.
That’s all about this blog post.
Thanks for reading, please provide your feedback. ?
Happy Learning, see you in my next blog 🙂