Integration between EPBCS and Essbase 21c

Summary:

Data transfer between EPBCS and Essbase 21 c (cloud)

Content (please ensure you mask any confidential information):

We are required to export all data from EPBCS cubes to Essbase 21c. The Essbase application on cloud (Essbase 21c) will be a replica of EPBCS cubes. I wanted to understand what is the best way to transfer data ( All level data). As per my knowledge, We need to export data from EPBCS in a file on a staging server using data management in Essbase loadable format and integrate it using DLR's. Is there any direct integration possible(Data maps or OOB Data management) bypassing file based integration?