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 is Storage 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