When I first installed vSphere 6.0 I was pretty impressed about the performance gain of the vSphere Web Client. Finally the Web Client is a tool I can work productive with and mustn’t be afraid to be marked as unproductive from my customers (it’s tough to argument a higher hour-rate if I wait 20% of my time for the UI 😉 ).

So my homelab was installed with vSphere 6.0 and I tried to connect to it via VPN from my hotel wifi. Since the wifi was blocking my VPN attempts I was forced to tether/share the internet via my smartphone.

Sharing internet on… starting OpenVPN against my homelab… opened Chrome to use the Web Client and.… the useability with the Web Client 6.0 was really really good.

After a few minutes I received a warning by my provider T-mobile that my data plan has reached the 80% thresholds. I know 500MB included in my data plan is not that much, but still I was really suprised seeing this OpenVPN statistics after a few minutes.

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Since I haven’t used any other services than the vSphere Web Client I wanted to know how much bandwidth working in a local Browser via the Web Client really needs.

I created a test-case (it’s Sunday, weather is bad, Bundesliga is pausing) which should take around 3-4 minutes:

  1. Login to the vCenter via the Web Client
  2. Navigate around in the home menu
  3. Select Hosts and Clusters
  4. Choose an ESXi Host and navigate to Manage / Settings / Networking
  5. View the vSwitch, virtual adapater and physical Nics settings
  6. Go to related Objects and select a datastore
  7. Browse the content of the datastore
  8. Create a new VM with default settings
  9. Power on the VM

I did this test with 2 Browsers Chrome and Firefox (to make sure the results are nearly identical) and observed the results via the activity monitor of MacOS. As a 3rd alternative I have chosen to use a remote connection via Microsoft Remote Desktop (native resolution, 16 Bit color) and did the same test-case steps mentioned above.

Here are the results:

  1. Chrome – duration: <4 minutes, bandwidth: ca. 21 MB
  2. Firefox – duration: < 4 minutes, bandwidth: ca:26 MB
  3. RDP – duration: < 3.5 minutes, bandwidth: ca. 2 MB

Of course there are a lot of factors not considered (high activity on the vCenter that might increase the data most certainly), but the numbers should give you a feeling that the better performance of the Web Client seems to come side by side with a pretty bandwidth sensitive caching on the client side. So if you work with limited bandwidth or any kind of throughput limitation use an RDP connection to a Control-Center VM within your environment that is able to use the Web Client for your daily vSphere operations.


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