The distribution of access (IOPS) to each Tier pool is displayed on a per capacity basis. For a two layer or three layer Tier pool, the distribution of capacity that is allocated to each tier is displayed in different colors. In addition, the set data range of High/Middle/Low is displayed in a horizontal line.
The display procedure is as follows:
In the configuration dialog box, select a device in the Target field and "Tier Pool" in the Resource field.
If you want to specify the displayed range of IOPS (vertical axis of the panel), select "Manual" in the IOPS Range field and input minimum/maximum values. Default is "Auto", which displays all the ranges in which data exists.
If you want to display an interval of IOPS (vertical axis of the panel) on a logarithm scale, select "Logarithm" in the IOPS Scale field. Default is "Linear", which is displayed on a linear scale.
Select one Tier pool from a table, and then click Add.
The Access Status Chart panel for the Tier pool is added to the Panel area.
The evaluation result of the latest generation is set to be displayed by default. When changing a displayed generation, select the target generation from the drop-down list of the Generation field. You can select from the latest generation to four generations back.
Point
Access status is displayed only when Automated Storage Tiering is enabled.
Hovering the mouse over a graph area on the panel displays the values of the IOPS and the capacity indicated by the location as a tooltip.
You can use an access status chart to quantitatively evaluate the introduction effect of Automated Storage Tiering and SSDs. Refer to the Storage Cruiser Operation Guide for Optimization Function for details.
