Where do we store variant items while persisting the table personalize data?

Hi All,

Can you please suggest me on how to store variantItems while persisting the table personalize data of SAP Fiori custom Apps using Variant Management control.

First, where do we store Variant Items to persist the table personalized data using Variant Management?

Second, can we use custom or standard OData service(non CDS OData) to store the table personalized data in variants. Moreover, if there is already custom OData service available for custom Fiori Apps, then shall we go ahead to enhance the existing custom OData service or create a new OData service to implement the Variant Management control to persist the table personalized data in back end DB provided by backend ABAP system.

Thanks!

Regards,

Sandip