This part of the lab is presented as a Hands-on Labs Interactive Simulation. This will allow you to experience steps which are too time-consuming or resource intensive to do live in the lab environment. In this simulation, you can use the software interface as if you are interacting with a live environment.

The orange boxes show where to click, and the left and right arrow keys can also be used to move through the simulation in either direction.

The Troubleshoot vSAN Dashboard begins with guiding the user toward looking at the Cluster level first.  Let's select the desired cluster.

1. Click the vSAN Cluster(vSAN6.6-Hybrid-Cluster)
2. Note that we can quickly see any alerts associated with the selected Cluster including VM's, Hosts and Devices.
3. Click the scroll bar down

The Step 3 'Are the relatives healthy?' widget provides a visual representation of Hosts to easily identify those with Alerts.

1. Click on the vSAN Cluster and select Alerts
2. In this example we are 'all clear' with no actionable alerts to explore further
3. Click the upper-right hand Close 'X'

The Step 4 'Is the cluster busy?' and Step 5 'Are outstanding I/Os high?' widgets allow us to get a quick understanding of the activity and demands of the cluster level over a period of time.

1. Examine these Metrics then click the scroll bar to scroll down when finished

Cluster based read latencies, write latencies and congestions are all presented as trailing indicators of changes in performance.

1. In the '6. Are VMs facing read latency' widget, click to drill down and widen our view of a specific time interval.
2. Note the data being returned via the additional Write and Congestion based widgets then click the right-hand scroll bar to scroll down when finished

Next we can look at Hosts and the associated disk groups in the vSAN Cluster

1. This view helps us see how full the write buffer is for each respective disk in this vSAN Cluster.
2. In the '9. Is the write buffer full on diskgroups?' widget, click the indicated disk to view more specific utilization information.
3. Note the '10. Are the read IOs served by cache?' widget.  In Hybrid vSAN Clusters, this view will show the hit rate of reads being served by the caching tier of each disk group.  We can easily isolate which disk groups and hosts have lower hit rates, which may be an indicator of some VMs having larger working set sizes, or excessive cache churn.
4. Click the scroll bar down

Information about the Host comprising the vSAN Cluster is displayed here and provides simple, yet important, visibility of basic configuration consistency.

1. Note that the '11. Are the hosts consistently configured?' widget allows a user to easily compare versioning (this includes Firmware levels which are shown in our simulator).
2. Within a selected disk group (Widget 13), we can easily see if IOPS are being aborted (Widget 14) and if any Storage Bus Resets have occured (Widget 15).
3. Click the scroll bar down

Finally, we can review the health and performance of Cache and Capacity devices in the vSAN Cluster.

1. For Cache devices (Widget 16), this Heatmap will highlight issues with the devices such as bus resets, commands aborted and S.M.A.R.T data
2. S.M.A.R.T data and other related information is offered for Capacity devices as well (Widget 17).  Click the 1-Bus Resets drop-down
3. Click 2-Commands aborted per second to update your view specific to this option

In Summary, this native vR Ops vSAN Troubleshoot dashboard delivers:

• A starting point for a vSAN Administrator to begin diagnostics of their environment.
• A repeatable, systematic workflow to narrow down the Root Cause of an issue by looking at the Cluster, followed by corresponding Hosts and the respective Disk Groups in the Host.
• A combination of current and past conditions to understand what might have changed, and when.
• Device level insight.

To return to the lab, click the link in the top right corner or close this browser tab.