If you want to move an existing deployed system from another relational database management system (RDBMS) to HANA. SAP provides reports to run on your existing SAP system. If the database is moved to HANA, these reports check the data and calculate memory requirements for the HANA instance.
/SDF/HDB_SIZING is a standard Executable ABAP Report available within your SAP system (depending on your version and release level).
ABAP code listing snippet for SAP ABAP Report /SDF/HDB_SIZING
*&-------------------------------*
*& Report /SDF/HDB_SIZING // ZNEWHDB_SIZE
*&
*&-------------------------------*
*& Estimates the memory requirement in HANA of non-HANA databases *
*& When run on HANA, size the database using real memory consumption
*& values.
*&-------------------------------*
* * REPORT /SDF/HDB_SIZING LINE-SIZE 101 LINE-COUNT 90
NO STANDARD PAGE HEADING.
DATA: l_version TYPE c LENGTH 6 VALUE '54'. "54.2
TYPES: ty_para(2) TYPE n,
ty_top(3) TYPE n.
TYPE-POOLS: abap.
DATA: tabname TYPE tabname,
subrc TYPE sy-subrc,
p_prf TYPE abap_bool,
See full code listing within your SAP system using transactions such as SE80 and SE38 Reference:
https://www.se80.co.uk/sapreports/-/-fs-/-fs-sdf-fs-hdb_sizing.htm
https://docs.microsoft.com/en-us/azure/virtual-machines/workloads/sap/hana-sizing