- Notes, cautions, and warnings
- Additional Resources
- Volumes
- Volume groups overview
- Hosts and host group configurations
- Data mobility for volumes and volume groups
- Thin clones
- Quality of Service (QoS) policies
- Performance policies
With maximum limits, you specify what the maximum number of sustained IOPS or bandwidth is allowed over time. Maximum limits apply only to I/O from external hosts. These limits do not apply to internal asynchronous or synchronous replication operations or migration I/O.
Each volume or volume group can be associated with only one QoS policy.
On a cluster level, there is a limit of 100 QoS policies for each cluster. However, there can be 1000 QoS associations for volumes and volume groups within a cluster.
If a QoS policy is assigned to a volume group, you cannot assign a different QoS policy to a volume within that group.