Total compression is the total amount of compression the Data Domain system performs with the data it receives. The first backup in our testing is entirely unique data and thus has the lowest total compression ratio (TCR) of 1.3.
The following figure shows the TCR that we observed in our testing.
Figure 7. Total compression ratio results for the Ready Node for SAP HANA
A higher TCR means a greater savings on Data Domain. The second backup had a TCR of 19 and the third backup had a TCR of 30.4. The TCR shows a substantial Data Domain space savings over backups. Technologies such as deduplication and compression enable the IT organization to do more with their investment in Data Domain data protection.