Home > Storage > ObjectScale and ECS > Product Documentation > Dell ECS with Commvault: Configuration and Best Practices > Commvault deduplication overview
Deduplication in Commvault combines data from numerous clients into objects stored in ECS. Commvault deduplication uses pruning methods to remove data from chunks, as needed, based on the retention policy.
Combining backups and archives for applications/clients requiring the same retention policies to dedicated Commvault storage policies might increase the likelihood that all data for a given object will eventually be a candidate for pruning and deleted to free up capacity.
For recommended best practices, see the Commvault Deduplication Best Practices.