Dashboard
The Dashboard on the management GUI provides a way to quickly assess the overall condition of the system and view notifications of any critical issues that require immediate action.
The Dashboard is the home page that displays after you log in to the system. It contains high-level information about the system and is not a replacement for the Performance page or the system view. The Dashboard contains sections for performance, capacity, and system health that provide an overall understanding of what is happening on the system.
Performance
The Performance section on the Dashboard displays a graph with up to 5 minutes of data from the performance of a specific system or a comparison of the performance of the nodes. Select either System or Node Comparison to switch the view between system-level performance and node-level performance.
The performance graph is updated with new data every 5 seconds. Select any of the available metrics to change what is displayed by the graph. To view a metric not available on the Dashboard, go to the Performance page in the navigation.
Capacity
The Capacity section on the Dashboard provides an overall view of system capacity. This section displays usable capacity, provisioned capacity, and capacity savings.
- Usable Capacity
- Usable capacity indicates the total capacity in all storage on the
system. Usable capacity includes all the storage the system can be virtualized and assigned to
pools. Usable capacity is displayed in a bar graph and is divided into three categories:
Stored Capacity, Available Capacity, and
Total. If the system supports self-compressing drives, certain system
configurations make determining accurate usable capacity on the system difficult. For example, if
the system contains self-compressed drives and data reduction pools without compression enabled, the
system cannot determine the accurate amount of usable capacity that is used on the system. In this
case, overprovisioning and losing access to write operations is possible. If this condition is
detected by the system, the Usable Capacity section of the
Dashboard page displays a message instead of capacity information. To recover
from this condition, you need to ensure that all thin-provisioned volumes and thin-provisioned
volumes that are deduplicated are migrated to volumes with compression enabled in the data reduction
pools. Alternatively, you can migrate the volumes to standard-provisioned volumes and use the drive
compression to save capacity.
- Stored Capacity
- Stored Capacity indicates the amount of capacity that is used on the system after capacity savings. The system calculates the stored capacity by subtracting the available capacity and any reclaimable capacity from the total capacity that is allocated to MDisks. To calculate the percentage, the stored capacity is divided by the total capacity that is allocated to MDisks. On the left side of the bar graph, the stored capacity is displayed in both the total capacity and as a percentage.
- Available Capacity
- The total Available Capacity displays on the right side of the bar graph. Available capacity is calculated by adding the available capacity and the total reclaimable capacity. To calculate the percentage of available capacity on the system, the available capacity is divided by the total amount of capacity that is allocated to MDisks.
- Total
- The Total capacity displays on the right under the bar graph and shows all the capacity available on the system. The bar graph is a visual representation of capacity usage and availability and can be used to determine whether more storage needs to be added to the system. Select MDisks to view more information about the usable capacity of the system on the MDisks by Pools page. You can also select Compressed Volumes, Deduplicated Volumes, or Thin-Provisioned Volumes.
- Provisioned Capacity
- Provisioned capacity is the total capacity of all virtualized storage on the system. Provisioned capacity is displayed in a bar graph and is divided into two categories: Written Capacity and Available Capacity capacity. Written Capacity displays on the left side of the bar graph and indicates the amount of capacity that has data that is written to all the configured volumes on the system. The system calculates the written capacity for volumes by adding the stored capacity to capacity savings. The percentage of written capacity for volumes is calculated by dividing the written capacity by the total provisioned capacity for volumes on the system. The Available Capacity displays on the right side of the bar graph and indicates the capacity on all configured volumes that is available to write new data. The available capacity is calculated by subtracting the written capacity for volumes from the total amount of capacity that is provisioned for volumes. The percentage of available capacity is calculated by dividing the available capacity for volumes by the total amount of capacity that is provisioned to volumes on the system. The Total Provisioned capacity displays under the Available Capacity and indicates the total amount of capacity that is allocated to volumes. The Provisioned Capacity also displays the percentage for over-provisioned volumes. The Overprovisioned value indicates the percentage of provisioned capacity that is increased because of capacity savings.
- Capacity Savings
- Capacity Savings indicates the amount of capacity that is saved on the system by using compression, deduplication, and thin-provisioning. The percentage value for each of these capacity savings methods compares the stored capacity before capacity savings is applied to the stored capacity after capacity savings is applied. Compression shows the total capacity savings gained from using compression on the system. Deduplication indicates the total capacity savings that the system is saved from all deduplicated volumes. Thin-Provisioning displays the total capacity savings for all thin-provisioned volumes on the system. You can view all the volumes that use each of these technologies. Different system models can have additional requirements to use compression or deduplication. These requirements can include additional hardware, licenses, or both to use these functions. Verify all system requirements before using these functions.The system supports several compression technologies, such as data reduction pool and self-compressing drives, where data is compressed in the hardware as it is written to a drive. A single capacity savings percentage for systems that use multiple compression technologies cannot be determined. Select View Compression Details to view savings details for each of the compression technologies that are currently used on the system.
System Health
The System Health section on the Dashboard provides a holistic view of the system through tiles of data that represent different components that make up the system. A tile contains one type of component, but it can contain multiple items of the same type.
The current software version number and the system ID are displayed above the Connectivity components category.
System Health tiles
The tiles of data in the System Health section of the Dashboard represent different components that make up the system, providing a holistic view of the system.
Each tile contains one type of component, but it can contain multiple items of the same type. For example, a Fibre Channel port is a component, so it is contained in a tile, but the Fibre Channel tile can contain multiple Fibre Channel ports. Tiles with errors and warnings are displayed first so that components that require attention have higher visibility. Healthy tiles are sorted in order of importance in day-to-day use.
- Hardware components display the health of all components that are specific to the physical hardware.
- Logical components display the health of all logical and virtual components in the management GUI.
- Connectivity components display the health of all components that are related to the system’s connectivity and the relationship between other components or systems.