To analyze workload performance activity and identify the cluster components involved in incidents, Performance Manager monitors and analyzes the logical and physical components of a cluster.
What a cluster is
You can group pairs of nodes together to form a scalable cluster. Creating a cluster enables the nodes to pool their resources and distribute work across the cluster, while presenting administrators with a single entity to manage. Clustering also enables continuous service to end users if individual nodes go offline.
What an HA pair is
An HA pair is two storage systems (nodes) whose controllers are connected to each other directly. In this configuration, one node can take over its partner's storage to provide continued data service if the partner goes down.
What logical storage is
Logical storage refers to the storage resources provided by Data ONTAP that are not tied to a physical resource.
What network processing is
Network processing is a software component in the cluster that handles read and write requests between client applications and the network protocols on the cluster.
What data processing is
Data processing is a software component in the cluster that handles read and write requests to the target storage aggregate.
Storage aggregates and disks
A storage aggregate is a logical grouping of physical storage that is protected by RAID technology. When you create a storage aggregate, you specify the number of disks in the underlying RAID set and the level of RAID protection for the set (RAID-4 or RAID-DP).
Data ONTAP 8.2 introduces Storage QoS, which can help you manage the risks that accompany meeting performance objectives for workloads. You can use Storage QoS to limit the throughput to workloads to a Storage Virtual Machine (SVM), or to groups of volumes or LUNs within anSVM, and to monitor IOPS and MBps performance.