Dashboard

The VAST Web UI dashboard offers you a quick and easy way to monitor your VAST Cluster.

The dashboard appears when you log in to the VAST Web UI. To return to it at any time, click the VAST Data logo at the top of the page or select Dashboard from the left navigation menu.

The dashboard features several cards:

You can choose whether to show information in these cards in MB/sec or GB/sec, using the selector in the upper left corner of the page. This allows you to scale the display according to the anticipated amount of data.

Capacity

The Capacity card shows the ratio of physical to logical capacity or ratio of usable to logical capacity.

By default, it displays usable capacity, which differs from raw physical capacity due to two components: a fixed initial space reservation for background activities and the overhead of parity blocks introduced by each write for data protection. The usable capacity values are adjusted to reflect realistic usable capacity whereas the physical capacity values reflect raw physical capacity.

If you wish, you can change the Capacity card to display raw physical capacity instead of usable capacity. The relevant setting is in the VMS page under Settings and is called Show usable capacity. Disable this setting to switch to physical capacity and re-enable to revert to usable capacity.

The Capacity card features the following:

Capacity Card

Data Reduction. The data reduction ratio (DRR), continuously computed as the ratio of all data written by your data clients to the cluster (including snapshots) to the physical capacity in use. This figure reflects the reduction performed by the cluster through compression, deduplication and such.

A percentage of Used, Auxiliary and Free capacity, with indication of the amount of Usable and Logical space size for each capacity type:

	Used	Auxiliary	Free
percentage	The amount of data written to the cluster.	The amount of data that has been deleted logically and may be held by snapshots.	The unused capacity of the cluster.
Usable	The amount of usable SSD space in use by primary data. This is similar to the physical used with overhead subtracted. The higher the data reduction ratio, the lower this value is relative to the amount of data that is logically written.	The amount of usable physical SSD space in use by snapshots and by any data that may be pending deletion at the current time.	The amount of physical SSD space available for use computed dynamically based on overhead impact.
Logical	The amount of logical data written to the cluster by data clients. This figure does not include snapshots.	The amount of logical data written to the cluster that was deleted and is being held as auxiliary data, either by snapshots or as deletion in process.	The estimated effective free capacity remaining for writing data to the cluster, computed dynamically based upon the observed data reduction ratio and overhead impact.

A percentage of Metadata usage. The percentage of the cluster's metadata space that is being used.
A percentage of iNode usage. The percentage of iNode utilization in the cluster.

Note
By default, the units of measurement shown on the Dashboard are base10 units. If you prefer, you can switch to base2 units.

Performance

The Performance card dials show real-time metrics.

In Default mode, the following client data access metrics are displayed:
- Bandwidth. The rate at which data is transmitted between the client network and VAST Cluster.
  Tip
  Hover over the dial to display read, write and total bandwidth. Click the dial to toggle between total bandwidth and a breakdown of read and write bandwidth.
- IOPS. The number of I/O operations performed per second.
  Tip
  Hover over the dial to display read, write and total IOPS. Click the dial to toggle between total IOPS and a breakdown of read and write IOPS.
- Latency. The time needed to perform an I/O operation.
  Tip
  Hover over the dial to display read, write and average latency (a weighted average based on read IOPS and write IOPS). Click the dial to toggle between average latency and a breakdown of read and write latency.
If you select Replication mode, the above metrics are shown for the connection between native replication peers.
If you select VAST DB mode, the following metrics are shown:
- Bandwidth. The rate at which data is transmitted between the client and VAST Cluster.
- Running. The number of currently running database queries.
- Scanned. The number of database table rows scanned per second.

Inventory

The Inventory card shows the main components of the cluster's hardware inventory and status information.

The card shows the count of components in the Active, Failed or Other state. ( Other refers to components in states other than Active or Failed.)

Tip
Click to go to the Infrastructure page that lists relevant components and provides detailed information about their status.

Metric Graph Cards

Each graph displays the levels of selected analyzed metrics as they varied in recent seconds. You can change the combination of metrics displayed on each graph.

To change which metrics are displayed on each graph, click and then select the metrics you want to display.
Hover over a point on a graph to see the values of the metrics at the selected point in time.

Tip
For deeper analytics, use analytics reports.