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To take a closer look at how a host uses the disk space available to it, and to promptly detect probable usage excesses, select the Disk option from the Subsystem list. Figure 1 will then appear.
This dashboard provides the following:
To view a bar chart in the Comparison tab page more clearly, click on it; this enlarges the chart as depicted by Figure 2 below.
If your expanded bar chart appears cluttered owing to a large number of disk partitions/processes, you can easily filter out the ‘not-very-important’ disk partitions / processes from the chart. Besides enhancing the readability of your bar charts, this enables you to focus on selected descriptors alone. For instance, in the bar chart, you can choose to view only the top-5 processes on the basis of the level of disk I/O activity. To achieve this, simply select the top-5 option from the Show list (see Figure 3).
After analyzing current disk performance thoroughly, if you want to engage in an in-depth analysis of the historical disk usage metrics, switch to the History tab page by clicking on it.
Like the bar charts, these measure graphs also enlarge when clicked (see Figure 4).
To assess the overall health of the disk partitions and to perform efficient service level audits on disk usage, you can convert the measure graphs into summary graphs, on-the-fly. For this purpose, click on the icon at the right, top corner of Figure 5. will then appear displaying summary graphs for a pre-configured list of measures.
Figure 6 : Summary graphs of disk usage
You can even expand the trend graph by clicking on it, and then alter its Timeline. By default, the trend graph plots the minimum and maximum values of a measure during the given timeline. In the enlarged mode, you can view the Graph type so that the average values or sum of trend values are plotted in the trend graphs instead.
In case of descriptor-based tests, the Summary and Trend graphs displayed in the History tab page typically plot the values for a single descriptor alone. To view the graph for another descriptor, pick a descriptor from the drop-down list made available above the corresponding summary/trend graph.