I/O Priority Manager e-Learning course
The I/O Priority Manager feature enables more effective quality of service management with the ability to align distinct service levels to separate workloads in the system. This feature helps maintain the appropriate performance and quality of service for each DS8000® volume, which can be especially helpful in multi-tenancy environments. I/O Priority Manager detects when the performance of a higher-priority application is hindered by a lower-priority application competing for the same system resources. This might happen when multiple applications request data from the same disk drives. When this happens, I/O Priority Manager automatically reduces the lower-priority I/O streams, so that the system’s resources can allow more important I/O streams to meet their pre-assigned performance targets. Automating quality of service management through I/O Priority Manager is one of many features that makes the DS8000 a smarter system.
To view detailed quality of service information collected by I/O Priority Manager, select . From the Storage Complexes Summary panel, select a storage image from the table. Then select .
From the I/O Priority Manager Selection panel, start by selecting the performance groups you want to include. Select a start and end date, and a start and end time. The end time should be more than an hour prior to the actual time. Next, select an interval time, report type, and resource type. Then select Get Data.
In the I/O Priority Manager Chart panel, use the list to view graphs illustrating various data. This includes how quickly the I/O streams of your priority applications have improved, the average response times during the analysis period, and whether specific volumes are meeting their quality of service targets. Use the list of groups on the right side of the pane to deselect, or hide, a performance group you requested to include in the chart. There are two charts so that you can compare these data points against each other over time.
To find out more about I/O Priority Manager, see the topics in the online documentation.