Most Active Nodes report
Shows a chart of the 20 nodes that are most active, and details for all nodes, for a time period that you specify. Use the report to analyze the performance of nodes.
Restriction: This
report applies only to SAN Volume Controller and Storwize systems.
Charts
The chart
shows the most active nodes on storage systems. By default, nodes
are sorted by the total overall I/O rate.
Tip: To change the sort order,
select a value from the Sort Order list.
Report output
The information that is provided for nodes is as follows:
- Storage System Name
- A user-defined name of the storage system. If a name was not defined, IBM Spectrum Control shows the name that was defined when the storage system was added for monitoring.
- Storage I/O Group Name
- The name that was assigned to the I/O group when it was added to the system.
- Storage Node Name
- The name that was assigned to the storage system node when it was added to the system.
- Storage System Configuration
- Shows whether a storage system is configured as back-end storage
or configured to virtualize back-end storage. If this value is
Storage System, the storage system is configured as back-end storage. If this value isStorage Virtualizer, the storage system is configured to virtualize back-end storage. - Overall Response Time (ms/op)
- The average number of milliseconds to complete an I/O operation. This value includes both read and write operations.
- Total Overall I/O Rate (ops/s)
- The average number of read operations and write operations per second. This value includes both sequential and nonsequential operations.
- Total Data Rate (MiB/s)
- The average number of MiB per second that are transferred for read operations and write operations.
- Processor Utilization Percentage
- The average percentage of time that the processors on nodes are busy doing system I/O tasks. This value applies only to resources that are running IBM Storage Virtualize.
Related reports
To open other reports that are related to a resource in this report, click the name of the resource. You can open the following related reports for the resources in this report:
| Resource | Related reports |
|---|---|
| Storage system | Performance of One Storage System |
| I/O group | Performance of One IO Group |
| Node | Performance of One Node |