Our new book, the vSphere HA and DRS technical deepdive is available on CreateSpace and Early this year Duncan. VMware vSphere HA and DRS Technical Deepdive zooms in on two key components of every VMware based infrastructure and is by no means a “how to” . pages. Dimensions: in. x in. x. vSphere 4. 1 HA and DRS Technical Deepdive zooms in on two key components of every VMware based.

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In fact, VCHA is exactly the same regardless of how it is deployed. If however there are not enough resources available it will not power on this VM. There is one additional item that you may be wondering about, though.

This should result in a migration which gives the most drepdive in terms of cluster balance, in other words: You can reconfigure your DRS rules so that the nodes are pinned to certain host groups on each side. VCHA, if configured properly, will indeed recover your vCenter Amd Appliance to an alternate node running in another location.

In his role, he covers vSphere Lifecycle. This means that every time you upgrade, replace certificates, or need to re-deploy the VCHA cluster you will have to tear down and manually clone the VMs, move them to where they need to run, resize the Witness, and re-setup all the DRS rules. I think, in hindsight, it may have been better to call these Automated Basic and Manual Advanced. For each host h that is not Source Host: In addition, lets say you need to do something that requires you to destroy the VCHA cluster such as changing certificates, changing the IP of vCenter Server, or restoring vCenter Server.


This book will take you in to the trenches of HA and DRS and will give you the tfchnical to understand and implement e. The A record for vCenter Server is controlled by whatever DNS service is being used in your environment and event if you can automate the updating of that A record to the new IP address there is still the real possibility that there will be transient issues due to the DNS TTL, propagation, and caching.

And a very special thanks to Scott Herold for writing the foreword! The question of course is for the VM which is being powered on what kind of values does DRS work with? As said every 5 minutes DRS will calculate the sum of the resource entitlements of all virtual machines on a single host and divides that number by the capacity of the host:.

HA and DRS Technical deepdive available

Great news on the book. For each VM check if a VMotion to each of the hosts which are less utilized than source host would result in a less imbalanced cluster and meets the Cost Benefit and Risk Analysis criteria. I will not be focusing on Resource Pools at all as I feel that there are already more than enough articles which depdive these.

The actual algorithm being used to determine this is described in this KB article. This is absolutely false. Based on these consideration a cost-benefit-risk metric will be calculated and if this has an acceptable value the VM will be consider for migration.

First of all we want to avoid a constant stream of VMotions and this will be done by weighing costs vs benefits vs risks.

HA and DRS Technical deepdive available –

Duncan is the owner of Yellow-Bricks. The in-depth discussions we had are without a doubt the most difficult I have ever experienced and were very interesting, both most of all fun!


With the Advanced setup you have to do all of that work manually. One of the most common questions we get and misconceptions I hear about is that in order to get all the features of VCHA you need to deploy using the Advanced workflow.

Some books have turned up on amazon. The result of all hosts will then be used to compute an average techjical the standard deviation. What if you have multiple locations and you want to protect vCenter Server from a complete site failure?

vSphere High Availability (HA) Technical Deepdive – Yellow Bricks

Also remember that in order to split the nodes across sites, you need to use the Advanced workflow. Howeverall of the workloads and hosts will remain in the failed site without some other DR orchestration. At least not 30 days. Frank is the owner of frankdenneman.

If so, can I reserve a copy? Do you know if it will be released on Amazon.

DRS Deepdive

But most of all I would like adn thank Duncan for giving me this opportunity to work together with him on creating this book. You need to fix your Amazon link. Much of that content can be found on vSphere Central.

Hi, The book should also be available e-reader format epub or kindle for those that have invested in e-readers or just find it more convenient to download the file.