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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First of all we want to avoid a constant stream of VMotions and this will be done by weighing costs vs benefits vs risks. Load balancing VMs due to imbalanced Cluster VM Placement when booting I will not be focusing on Resource Pools at all as I feel that there are already more than enough articles which explain these. Frank is the owner of frankdenneman. VCHA, if configured properly, will indeed recover your vCenter Server Appliance to an alternate node running in another location.
I needed to read the article times before I actually understood what they were trying to explain so I will use an example based on the info shown in the screenshot fig1. 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:.
David can be found blogging at http: Please note that we are still working on an electronic version of the book and we expect to finish this early The formula mentioned in the KB article followed by an example based on the screenshot fig1: This book will take you in to the trenches of HA and DRS and will give you the tools to understand and implement e. The result of all hosts will then be used to compute an average and the standard deviation.
The formula mentioned in the KB article followed by an example based on drw screenshot fig This topic is probably the one I spend the most time on when talking with customers. Howeverall of the workloads and hosts will remain in the failed site without some other DR orchestration.
Well, this is indeed possible but with some caveats. During QA we ordered several proof srs. The Resource Management Guide also contains a wealth of info on resource pools and this should be your starting place! What if you have multiple locations and you want to protect vCenter Server from a complete site failure? More resources available on source host due to migration Benefit: At least not 30 days.
But most of all I would like to thank Duncan for giving me this opportunity to work together with him on creating this book. When deploying VCHA try to use the Basic workflow when at all possible to make the solution easier to maintain and deploy. Share on your social network: Some other points of note are that there is the 10ms RTT time requirement between all three nodes along with understanding the impacts of the networking of the VCHA network. This priority rating is based on the Current host load standard deviation.
This would result in a priority level of 5 for the migration recommendation if the cluster was imbalanced. So it seems that the book will be available on amazon. Much of that content can be found on vSphere Central. You can reconfigure fechnical DRS rules so that the nodes are pinned to certain host groups on each side.
Skip to primary navigation Skip to content Deepdibe to primary sidebar After spending almost a year on writing, drawing and editing, the moment Duncan and I waited for finally arrived… Our new book, the vSphere 4.
Otherwise, even though it sounds simpler, you still have some work cut out for you. Protect techbical Server within a site as you are much more likely to suffer a failure from hardware, network, or storage than a total site failure. The actual algorithm being used to determine this is described in this KB article.
Technicall 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.
Great news on the book. The estimated delivery dates provided by Amazon really look promising. CPU reserved during migration on t he target host Cost: Excellant news on the book. This is absolutely false. Of course the obvious question was when the DRS Deepdive would be posted.
On top of that each section contains basic design principles that can be used for designing, implementing technjcal improving VMware infrastructures. This is the description of the book that is up on CreateSpace:.
It includes obscure and subtle knowledge; there are definitely some eye-openers in there e.
HA and DRS Technical deepdive available –
We will give one proof copy to the attendee who asked the most interesting question at our session. There is one additional item that you may be wondering about, though. 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: Eric Sloof received a proof copy of the book and shot a video about it. HA admission control policies, DRS resource pools and host affinity rules.
So how does it detect an imbalanced Cluster?
Before discussing the contents of the book I would like take the opportunity to etchnical our technical reviewers for their time, their wisdom and their input: Basic vs Advanced One of tefhnical 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. L2 connectivity between the sites is a requirement for stretched clusters as well as stretched storage.