The Dashboard 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.
Capacity
The Capacity section on the
Dashboard provides an overall view of system capacity. This section
displays physical capacity, volume capacity, and capacity savings.
- Physical Capacity
- Physical
capacity indicates the total capacity in all storage on the system. Physical capacity includes all
the storage the system can virtualize and assign to pools. Physical capacity is displayed in a bar
graph and divided into three categories: Stored Capacity,
Available Capacity, and Total Physical.
- 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 free 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 Physical
- The Total Physical capacity displays on the right under the bar graph and
shows all the physical 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 View MDisks to view more information about the physical
capacity of the system on the MDisks by Pools page.
If you are using the command-line interface to determine physical
capacity usage on your system, several parameter values are used from the
lssystem command to calculate stored, available, and total capacities. Stored
capacity is calculated with the values in the
total_mdisk_capacity,
total_free_space,
total_reclaimable_capacity by using the
following formula:
- Total stored capacity = total_mdisk_capacity -
total_free_space - total_reclaimable_capacity
To calculate the available capacity, use the values in
total_free_space
and
total_reclaimable_capacity in the following formula:
- Total available capacity = total_free_space +
total_reclaimable_capacity
The value in the
total_mdisk_capacity in the
lssystem
command indicates the total physical capacity on the system.
- Volume Capacity
- Volume capacity is the total capacity of all virtualized storage on the system. Volume capacity
is displayed in a bar graph and divided into two categories: Written Capacity
and Total Provisioned 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 Volume Capacity also displays the percentage for over-provisioned
volumes. The Overprovisioned value indicates the percentage of volume
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.
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.
Mini-Dashboard
The Mini-Dashboard provides an at-a-glance look at the total, read, and
write latency, bandwidth, and IOPS performance metrics for the system. The
Mini-Dashboard displays at the bottom of the management GUI after you leave the
Dashboard page. The information can be used in the following ways:
- Compare expected I/O rates against actual I/O rates for analytic workloads or transactional
workloads.
- Compare system performance among managed systems.
- Determine optimal system usage.