My honest review of @DuncanYB & @FrankDenneman vSphere 4.1 HA and DRS Technical Deepdive Book

I have order the “vSphere 4.1 HA and DRS Technical Deepdive” by @DuncanYB most famous by 007 & @FrankDenneman about 3 months back on Amazon. I received the book about one month after ordering due to the distance the book had to travel I guess, although I paid for shipping more than I paid for the book. I can not blame the authors for the long shipping time, as I had this same problem with Amazon with every book I have ever ordered.  So if you are in rush for the book, then you might want to look at buying the e-book edition at even a cheaper price than the paper back. This was not available at the time I ordered, though hey having the paper back was worth the wait.

I believe the book was well worth reading for me, although I had a good idea of many of the concepts it had covered it was great to have a refresh of these concepts in one place with the updated best practices. Further, quite few concepts were totally new to me. Over all I think the book was worth my money and time. Further, I believe if I had read the book before going multiple times over  HA DeepDive & DRS DeepDive posts on @DuncanYB, I would have got even a ton more surprises in the book.… Read More

VMWARE ESXi – Host in HA Cluster must have userworld swap enabled

I had always been using the VMware ESX version in my implementation. As I noticed that VMware seems to be pushing toward the move to ESXi, I had decided to try the latest version for a full scale installation. Though when I was trying to configure HA for my VMware ESXi Cluster, I had been hit with the below error:

HA agent has an error : Host in HA Cluster must have userworld swap enabled

VMware ESXi HA Error

Luckily the VMware support was quite helpfull as the usual and gave me the simple solution for the problem in less than a minute, I was back up and running with HA configured. So I decided to share the solution with you. Read below the steps for the solution:

Well, it end up that ESX Server 3i systems with swap not enabled cannot be added to HA clusters, so you have to enable the Swap in order for HA to work. Below is how you enable the Swap in ESXi.
To enable swap on your ESXi 3 host system:

  1. On the VirtualCenter Server, select the ESXi 3 Server host.
  2. Click the Configuration tab.
  3. Click Advanced Settings.
  4. Choose ScratchConfig.
  5. Configure ScratchConfig.ConfiguredScratchLocation to a valid directory with sufficient space (1GB) to hold the userworld swap file.

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