Data Domain and vSAN Deduplication and Compression together

Question

Data Domain DD9300 expanded configuration, Data Domain OS 6.1.2.10-603959 VxRail P470F VMware ESXi 6.5.0 vSAN 6.6.1    Does anyone know how Deduplication and Compression work when they're enabled on both vSAN and DD? How can a deduplicated and Compressed block at the disk group level in vSAN be deduplicated in segments and Compressed again in the Data Domain system? I haven't been able to find any documentation related to this info and the best practice around the capacity saving feature when both systems (vSAN and DD) provide them.

Mikhail_Nikitin · Accepted Answer

vSAN deduplication and compression does not affect or interact with Data Domain deduplication. When you take a backup, backup software would read blocks in original (inflated) format and transfer them to Data Domain for deduplication, which will in turn process them using its own algorithm.

winsoso · Answer

That makes sense. Thanks for your response.By the way, VEEAM is our backup solution and we use DDBoost with our Data Domain.

Data Domain

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