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Jeremy Wheeler

I am an experienced Consulting Architect for VMware’s Professional Services Organization, End-user Computing specializing in VMware Horizon Suite product-line and SDDC. I have over 23 years of experience in the IT industry. In addition to his past experience, I have a passion for technology and thrives on educating customers. Additionally, I have 10 years of hands-on virtualization experience deploying full-life cycle solutions using VMware, CITRIX, and Hyper-V. I also has 18 years of experience in computer programming in various languages ranging from basic scripting to C, C++, PERL, .NET, SQL, and PowerShell. I’ve received acclaim from several clients for my in-depth and varied technical experience and exceptional hands-on customer satisfaction skills. In February 2013, I received VMware’s Spotlight award for my outstanding persistence and dedication to customers and was nominated again in October of 2013. I was awarded 2015 – 2017 vEXPERT.

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SQL Server or Normal VM behavior for HA

Jeremy Wheeler
May 5, 2015July 1, 2015 1 min

In the event your organization is considering maintaining a SQL server on a Stretched Management cluster (Metro Cluster) or normal cluster please keep in mind the following:


  1. Normal Operations
  2. Host fails and dedicated resources of vCPU, RAM, are now unavailable
  3. Admission Control triggers an HA event 
  4. Virtual Machine is power cycled-down
  5. DRS migrates Virtual Machine to surviving host in the cluster
  6. Virtual Machine is powered-on based on power policy 

Step 4, 5, 6 would cause an outage unless the SQL DB is clustered. Stretched storage only
will help for migration between hosts but dedicated compute resources to VMs will still cause an outage. 

Even placing a stretched storage solution in a cluster doesn’t magically maintain a fully powered on VM. If you steal the compute resources from anything it’s going to have a bad time. The only way around this would be to setup VMware’s FT where everything is mirrored between Host A and Host B.

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