Monitor > About the Utilization App

About the Utilization App

The following information applies to version 1 of the Utilization application.

Prerequisites

The Utilization app shows the current statistics in addition to historical and future trends for the environment’s storage tiers, including a detailed view for each system and for each volume (file system) of a system. A system is an MDC or client that provides statistics. In the case of a high availability (HA) Quantum appliance, the primary MDC (Node 1) sends the statistics to the StorNext Connect system (Node 2).

Overview Demonstration

About the Utilization Application Charts and Graphs

When you open the app, the app shows the utilization data for all systems in the environment. Use the system links in the Capacity/Activity tables to drill into the utilization view for a particular system. Then use the volume (file system) links in the Capacity/Activity tables to drill into the utilization view for a particular volume. To return to a broader view, use StorNext Connect's breadcrumb links at the top of the page.

Application Refresh Intervals

The Utilization app data is refreshed automatically every 60 seconds. Primary storage statistics, metadata statistics, and Storage Manager I/O statistics are updated every minute, while Storage Manager capacity statistics are updated every 10 minutes. Changes in the data shown depend on how often the statistic is updated as well as the type of chart or graph.

Chart or Graph Refresh Interval

Total capacity chart

Updated at the fastest interval possible for the given statistic (every minute for primary storage capacity, every 10 minutes for Storage Manager capacity).

Metadata chart

Updated at the fastest interval possible for the given statistic (every minute for metadata capacity).

Primary storage chart

Updated at the fastest interval possible for the given statistic (every minute for primary storage capacity).

Historical/forecast capacity graph

Summarized per day and updated every 30 to 60 minutes.

Upon the 60-second app refresh, the app resets the graph to the default display (if you changed the zoom or pan).

Archive storage tier charts

Updated at the fastest interval possible for the given statistic (every 10 minutes for Storage Manager capacity).

Storage Manager activity graph

Updated at the fastest interval possible for the given statistic (every minute for Storage Manager I/O).

Object/segment activity chart

Updated at the fastest interval possible for the given statistic (every minute for Storage Manager I/O).

Capacity table

Updated at the fastest interval possible for the given statistic (every minute for primary storage and metadata capacity, every 10 minutes for Storage Manager capacity).

Activity table

Summarized on a per day average and updated every minute.

In addition, the Utilization app page is reloaded every 15 minutes, resetting the current page to the default display. For example, if you scroll down and click the Activity tab to show the read/write activity, the page load will reset the display to the top of the page, and if you scroll down again you'll notice the default Capacity table is shown instead of the Activity table.

Note: Be patient! The page load time of the Utilization app can take longer than other StorNext Connect applications because of the many data points being rendered. Other factors can also affect the page load time, such as the network, CPU speed, and RAM of the browser system.

Troubleshooting the Utilization App

Symptom Probable Cause

I don't see a system that I expect to be shown in the Workspaces (Clusters) column of the Capacity/Activity table.

The components in the environment must be discovered prior to monitoring. Use the Discover Components app to see the topology of the StorNext environment. If it is not as expected, try a rediscovery.

See Introduction to StorNext Connect Discovery.

Also, make sure the latest Connector version is downloaded and installed on all systems. See Install the Connector on Clients.

"No data" is shown for some of the charts and graphs.

The "No data" message can appear for the following reasons:

  • Tier is not licensed
  • Tier is not configured
  • Tier is offline
  • Tier data is zero or null
  • Storage Manager is down

If the system is new, allow some time for statistics to reach the StorNext Connect system and render in the Utilization app. It can take 10–30 minutes for metadata and primary storage statistics to load in the Utilization app and 30–60 minutes for archive storage statistics to load after Storage Manager data movement occurs.

Also, make sure the version of the system being monitored is StorNext 5.4 or later.

The metadata and primary storage statistics shown in the Utilization app are different than I expected.

The Utilization app calculates the capacity and usage of metadata and primary storage with the assumption that separate stripe groups are configured for metadata and user data in every volume.

If one or more volumes use a combined stripe group (both metadata and user data), the volume(s) with the combined stripe groups are shown in the app as though both metadata and user data have the entire stripe group's available capacity. As a result, the space used in a combined stripe group is counted twice in the metadata and primary storage charts, and both metadata and primary storage values in the historical graph include the space used in the combined stripe group, resulting in the reporting of more space used than actual space used.

If some volumes have combined stripe groups, while other volumes have exclusive metadata or exclusive user data stripe groups, the aggregated values are calculated as a weighted average of both configurations.

Note: For most Quantum appliances, the HA shared volume is configured using a combined stripe group for metadata and system-implementation data, and the volumes for actual user files are configured with exclusive stripe groups.

You can view the volume configuration in the StorNext GUI. See the View a File System section of the StorNext 5 Documentation Center for more information.

The historical graph is not showing data from today.

The historical/forecast capacity graph shows data summarized once a day according to coordinated universal time (UTC), while the label reports the time zone for the browser system. As a result, data as recent as 00:00 UTC is accounted for in the graph; however, the label shows the local time offset from UTC, which may appear to be earlier.