Sample backup compression figures – SQL Server 2012. The relative sizes and timings are interesting. This was a database with data that compressed well.
- Uncompressed backup file: 73.4GB. 18 minutes to create
- Compressed backup: 17.5GB. About 20 minutes to create
- Compressing the 73.4GB backup file using 7-zip: 9.7GB. About 2 hours to compress.