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VMware Fling: DRS Lens

DRS Lens is an fling from VMware which helps to monitor your vSphere DRS clusters. vSphere DRS is most useful feature for balancing the load on the cluster & ESXi hosts. DRS comes with 3 types of options such as Manual, Partially Automated & Fully Automated. When you use Fully Automated mode DRS itself moves the vm’s from one host to another & try to balance the load of the cluster.

When DRS is running you can see that your VM’s are migrated from one host to another or from one cluster to another. But there is no such more visibility available for that. So VMware has announced new Fling tool called DRS Lens. DRS Lens will give you an complete overview & visibility of your cluster DRS. You can see & monitor the cluster status visually by Graph’s & Bar’s. DRS Lens provides a simple, yet powerful interface to highlight the value proposition of vSphere DRS.

Summary tab will show you the details about monitoring service. you can start & stop from it here. you will also get the monitoring time & threshold values. you will also get the cluster summary.

You will get different types of dashboards such as:

VM Happiness:


VM Happiness shows the values such as which virtual machines are happy & which virtual machines are unhappy. You can choose the Bar to view more details about the VM’s such as CPU Ready & VM Memory Swap rate.

Cluster Balance:


Cluster Balance will help you to know the information about cluster balance & imbalance states according to different times. This value changes when the DRS is running.



This dashboard provides a summary of vMotions that happened in the cluster over time. It will show you the vMotion which are User Initiated or DRS Initiated. This helps users see how actively DRS has been working to resolve cluster imbalance.



This dashboard will show the various action or tasks which are performed in vSphere cluster. Here you will get all the details such as VM power on or off, cluster reconfigure, User Initiated vMotion or DRS Initiated vMotion and many more. You can choose the value which you want to see.

As we have already seen the data which we get from the DRS Lens. So for using it first you need to download it from below link:
Download DRS Lens

System Requirements:
Memory: 4GB

It is an OVA file so you can directly deploy the OVA Template using vCenter Server. Once you successfully deploy the template. power on the DRS Lens VM.

You can access it using the IP address or Hostname followed by drs/app.
For e.g
Https://IP or Hostname/drs/app In my case it is


You will get the below screen. Put your vCenter Server Details here & click Login.



You will get certificate prompt click on Trust to accept it. Then you are in the summary tab. Click Start button to start the monitoring.



Here you can configure cluster settings such as monitoring duration, CPU readytime & Memory swap rate.
Click Apply to save.

Then again you will get the prompt for vCenter login so provide your vCenter Server details & click Login to start monitoring.


Source: VMware Flings.

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Mayur Parmar

Hi I am Mayur Parmar. Independent Author & Founder of Mastering VMware. I am working in IT industry for more than 4 Years with knowledge of VMware , Microsoft Server's, Linux Server's.

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