A workload represents the operations that a cluster serves for specific volumes in QoS policy groups. The workloads are either user-defined or system-defined. Performance Manager collects and analyzes performance activity from both workload types.
The following types of workloads are monitored:
- User-defined workloads
- The I/O throughput from applications to the cluster. These are processes involved in read and write requests. A FlexVol volume is a user-defined workload.
Note: Performance Manager only monitors the workload activity on the cluster from requesting applications, but does not monitor the applications, the clients, or the paths between the applications and the cluster.
OnCommand Performance Manager requires that any volumes that you want to monitor be in a QoS policy group. Volumes that are not in a policy group are automatically added to the default policy group when you add the cluster. When Performance Manager analyzes the cluster for configuration changes every 15 minutes, it adds any new volumes not in a policy group to the default policy group. If an SVM is in a policy group, Performance Manager cannot monitor the volumes contained in the SVM and the overall analysis is impacted. Removing the SVM from the policy group corrects this issue.
- If one or more of the following are true for a workload, it cannot be monitored by Performance Manager:
- The associated SVM is in a policy group. Either remove the volume from the SVM or remove the SVM from the policy group.
- It is a data protection copy, such as a snapshot, in read-only mode, which cannot be assigned to a policy group.
- It is an Infinite Volume, which cannot be assigned to a policy group.
- It is an offline data clone, which cannot be assigned to a policy group.
- It contains LUNs or files that are in a policy group.
- System-defined workloads
- The internal processes involved with storage efficiency, data replication, and system health, including:
- Storage efficiency, such as deduplication.
- Disk health, which includes RAID reconstruct, disk scrubbing, etc.
- Data replication, such as SnapMirror snapshots.
- Management activities
- File system health, which includes various WAFL activities.
- File system scanners, such as WAFL scan.
- Copy offload, such as offloaded storage efficiency operations from VMware hosts.
- System health, such as volume moves, data compression, etc.
- Unmonitored volumes
Note: Performance data for system-defined workloads is only displayed in the GUI when the cluster component used by these workloads is in contention. For example, you cannot search for the name of a system-defined workload to view its performance data in the GUI. If multiple system-defined workloads of the same type are displayed, a number is appended to the workload name. The number is intended for use by support personnel.
For more information on workloads in storage QoS, see the Clustered Data ONTAP System Administration Guide for Cluster Administrators.