How much free space is needed for the exported data of SAP System Copy?

 

How much free space is needed for the exported data of SAP System Copy?

If you are going to perform System Copy export for an SAP ABAP system. You want to know, how much free space is needed for the exported data in the file system. I mean Approximate Export dump file size.

The first test migration requires 10%-15% of the uncompressed source database size as export file system free space.

 

Depending on the source database used for the export, a data compression ratio of between 1:4, and 1:10 or more can be achieved. The compression is performed at block level, so the file cannot be decompressed as a whole.

 

Please note that, the "compression ratios may vary depending on the different DB type and version". It is always highly suggested to perform test runs on systems which has similar data with the Production system. In the test runs, you can learn about the exported data size in a more accurate manner. 

Reference : KBA for educational purpose