Release Notes, 8/30/18

Live Optics Agent


Buying a complete HCI solution generally follows this workflow

Run an assessment
Running an assessment is the first and foremost step where an existing system is evaluated and major metrics which affect the HCI solutions sizing and performance are calculated. Some of the important ones are IOPS, Throughput, Latencies, vCPUs, vMem etc.

Running an assessment is very important and highly recommended. Running an assessment means a customer takes his existing workload and uses the exact data to size a solution. Without an assessment, it is very hard to guess critical metrics which can have huge impacts on the sizing and TCO.

This step is where we run the metrics collected from the assessment and run through predefined math which is used to calculate hardware for optimal performance of the HCI solution. Sizing involves many other manual inputs which are outside of the scope of assessment like: Choosing an All Flash v/s Hybrid setup etc.

Calculate TCO
The sizing exercise provides several recommendations from various hardware vendors and also fetches the latest price of components and provides an estimated TCO


In this context, the assessment is run with Live Optics and the sizing is done with the VMware vSAN Sizer. Live Optics is a powerful tool that collects metrics from environments and prepares highly readable charts giving deep insights.


New Features/Fixes

This release adds a feature to Live Optics which allows sending the data from the assessment to the VMware vSAN Sizer and running a sizing for the environment assessed.

Enhancing Live Optics makes a seamless connection between running an assessment and doing a sizing exercise. Without this, it is very hard to guess metrics which are not visible to the eye like IOPS and Throughputs and run a sizing exercise. Minor errors in calculations can result in over or under sized solutions leading to non-optimal performance and potentially highly increased cost of ownerships.

The VMware assessment report dashboard in Live Optics has been enhanced to show an option for exporting the assessment data for vSAN Sizing.


Clicking on the ‘Export’ button will provide the user with an option which reads: ‘vSAN Ready Node Sizer’. On clicking this button Live Optics will collect workload information from the assessed environment (More Information about the data is given below)

• Serialize it to a format that the vSAN Sizer understands
• Encrypt it and send the data to vSAN Sizer.

On receiving data from Live Optics, vSAN Sizer acknowledges the data was received and responds with a token. Live Optics uses this token to redirect the user to the vSAN Sizer UI in a new tab in the browser. The user will have to enter some information manually, that is not captured in the assessment (and these are beyond the scope of the assessment), things like: does the user want an All Flash vSAN Setup or a Hybrid vSAN Setup? Once the users provide these information, rest of the fields will have the values populated from the data that was sent from the Live Optics assessment. The data that sizer expects is:

• Profile Mode: All Flash/Hybrid
• Deployment Scale
• Workload: VDI, Databases, General Purpose
• Workload Type: Oracle (Databases only), Microsoft SQL Server (Databases only), Full Clone (VDI only), Linked Clone (VDI only), Instant Clone (VDI only)

The below screenshot shows that values on subsequent screens of the vSAN Sizer are already populated with the data sent.

Once the user has provided this information, the vSAN Sizer provides recommendations about various HCI Solutions.


About vSAN Sizer
The vSAN ReadyNode™ Sizer is a tool built for sizing HCI workloads. The logic accounts for compute and storage requirements when sizing for a single and multi-workload environment. The vSAN ReadyNode™ Sizer is designed for vSAN. There are several overheads, performance-based limits, and vSAN specific features which have been accounted for in the logic. The tool offers a high degree of customizability in terms of feature selection as well as user-based options. URL:


Data & Security
This section explains in detail about the security protocols implemented when data is transferred from Live Optics to vSAN Sizer and also explains what are the data points those are sent to the sizer.

Data Encryption & Transfer
The data is serialized into JSON and then encrypted with industry standard Algorithms. Live Optics and vSAN Sizer authenticate with each other based on shared secrets. Once the two tools authenticate initially, further communication is verified by the vSAN Sizer based on a pre-authenticated token. Other security protocols implemented require these authentication tokens to be always unique whenever they are generated and expire based on time.

Data Points Transferred
The below table explains what data is taken from Live Optics and transferred over to the vSAN Sizer. Some fields are taken as-is, but one some fields we apply minor math which helps in sizing.

In the below table, the first column, named ‘Live Optics Field’, lists what you see in Live Optics Report Dashboard. These are the fields that we take data from and send it over to vSAN Sizer.



Along with the assessment data, we also capture the Live Optics Logged in Users, First Name, Second Name and the email address.


Live Optics Support for Live Optics can be sought by browsing to or by sending an email to

vSAN Sizer Support for vSAN Sizer can be sought by sending an email to 


Note: Feature is in Beta
Please note that the feature is in Beta. While we are working towards making a full feature release, please be patient if you run into issues. Seek support assistance if you run into unexpected errors.



Was this article helpful?
2 out of 2 found this helpful
Article is closed for comments.