VMware vSphere offers three different types of clones including full clone, linked clone, and instant clone. In this paper, VMware evaluates clone performance with a variety of workloads and discuss the provisioning rates of the different clone types. In addition, we provide some tips and tricks to improve the provisioning rates.
Thursday, February 25. 2021
Understanding Clones in VMware vSphere 7: Performance Study
Friday, February 12. 2021
Postman and the Elgato Key Light Air API
Due to Covid-19, I’m delivering VMware training courses online. Most of the time, I’m using Zoom but sometimes I have to switch back to WebEx. I always activate my camera, so the students have better interaction with me.
I never worried about the light but since a lot of people are working from home and posting their home-office pictures on Twitter I noticed some of them were using studio lights. After some investigation I decided to buy a Elgato Key Light Air.
The light can be switched on and off with the Control Center app and it’s also possible to change the brightness and the colour temperature. It’s remotely controlled through 2.4 GHz Wi-Fi.
I was wondering if there was a way to use REST and interact with the light. After some googling, I’ve found a PowerShell module developed by Trevor Sullivan. In his post he mentions the URL and shared an example JSON body needed for the REST API call. The JSON body has 3 parameters, on – brightness and temperature.
{
"numberOfLights": 1,
"lights": [
{
"on": 1,
"brightness": 20,
"temperature": 200
}
]
}
The URL to the API is http://IP address:9123/elgato/lights and it listens to GET and PUT commands. I want to give it a try with Postman and see if I could get this to work. You don’t need an authentication header, just a GET or PUT REST API call and a JSON body and it allows you to control the light.
Fist I send a GET request to get the current setting of the light and copy and paste these setting into the JSON body of my PUT request. After changing some parameters an hit SEND for the PUT request, the light changes immediately.
Interesting read: Automating Elgato Key Lights From macOS Touch Bar
Tuesday, February 2. 2021
Free e-book - Micro-segmentation for Dummies Guide, 2nd Edition
This book provides a broad overview of micro‐segmentation in the data center. After reading this book, you’ll have a good basic understanding of micro‐segmentation — like you’d get
from a college‐level 101 class, but far more interesting than Microbiology 101 or Microeconomics 101 (and not as difficult either)!
In the Micro-segmentation for Dummies book you’ll learn:
- How to develop an inherently secure data center with network virtualization and workload-aware granular firewalling.
- How leveraging micro-segmentation prevents the lateral spread of security threats.
- The 10 key business and functional benefits of micro-segmentation.