Most Active Host Connections report

Shows a chart of the 20 host connections that have the most active volumes. The most active volumes have the greatest aggregate load.

Chart

The bar chart shows the most active host connections. By default, host connections are sorted by the total I/O rate.

Tip: To change the sort order, select a value from the Sort Order list.

Report output

The information that is provided about the most active host connections is as follows:

Storage Host Connection Name: The user-defined name that describes the server or storage device that is assigned to a volume.
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 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.
XIV Cluster: The name of the cluster, if any, as defined on the XIV. If no cluster is defined for the host connection, this field is blank.
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.
Overall Read Cache Hit Percentage: The percentage of all read operations that find data in the cache. This value includes both sequential and random read operations, and read operations in the volume cache and volume copy cache where applicable.; You can use this value to understand throughput or response times. Low cache-hit percentages can increase response times because in the event of a cache miss, the data must be read from the back-end storage resources.

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
Host connection	Summarized Performance of Volumes by Host Connection
Storage system	Performance of One Storage System