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Dell PowerStore Monitoring Your System

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Capacity forecasting and recommendations

PowerStore uses historical capacity metrics to forecast when your appliance or cluster may run out of storage space, and to provide recommendations on how to free up the system resources.

Capacity forecasting

There are three threshold levels that are used to forecast system capacity alerts. Thresholds are set by default and cannot be changed.

Table 1. Capacity alert thresholdsThe table lists the levels that are used to forecast system capacity alerts.
Priority Threshold
Major 1–4 days until the appliance or cluster is full.
Minor 15–28 days until the appliance or cluster is full.
Okay 4+ weeks until the appliance or cluster is full.

Alerts appear in the appliance or cluster charts, and also in the Notifications > Alerts page.

Forecasting starts after 15 days of data collection for the cluster or appliance. Before 15 days of data collection, an "Insufficient data to predict time to full" message appears in the Physical Capacity area next to the chart. Forecasting includes data for up to one year, with a two-year retention period.

You can look at the capacity chart to get a graphic visualization of the capacity forecast for the cluster. To open the capacity chart, go to the Dashboard window and select the Capacity tab.

Figure 1. Cluster capacity chart - forecasting
capacity forecasting
  1. Selecting the Forcast option, displays the mean predicted physical usage (for the next seven days).
  2. Selecting the Forcast Range option, displays the range of low-to-high predicted physical usage (for the next seven days).
  3. Hovering over the forecast section of the capacity chart, displays the values for mean-predicted usage and range of predicted usage.

Capacity recommendations

PowerStore also provides a recommended repair flow. The repair flow provides options to free up space on the cluster or appliance. The Repair Flow options are provided in the Alerts panel and include the following:

Table 2. Capacity recommendationsThe table lists recommended repair flows to free space on the cluster or appliance.
Option Description
Assisted Migration Provides recommendations of volumes, or volume groups to migrate from one appliance to another. Migration recommendations are generated based on factors such as appliance capacity, and health. You can also choose to manually migrate volumes, or volume groups, based on your own calculations, when your cluster or appliance is approaching capacity.

Migration is not supported for file systems.

Migration is supported within a single cluster with multiple appliances.

Migration recommendations are provided in the PowerStore Manager after a Major threshold is met. However, you can use the PowerStore REST API to review migration recommendations at any time.

Clean Up System Delete system resources that are no longer being used.
Add More Devices Purchase additional storage for your appliance.

Recommendations expire in 24 hours to ensure that the recommendation is always current.

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