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# QOS for replication

The QoS (Quality of Service) feature adjusts the data transfer (copy) pace on individual volumes or groups of volumes (DGs or SGs) for certain operations.

By increasing the response time for specific copy operations, the overall performance of other storage volumes increases.

The following tasks are supported:

- Set copy pace (QoS) for storage groups
- Set copy pace (QoS) for device groups
- Set copy pace (QoS) for volumes

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