Q&A Recap: Shared Disk Webinar With Microsoft’s Kevin Farlee

Huge thanks to everyone who was able to join us for our short webinar this week, “How to Build Shared Disk SQL Server Clusters in Azure.

We had the privilege of having Microsoft Principal Program Manager, Kevin Farlee, join us to provide insight on the recently released Azure shared disks – the industry’s first cloud block storage.

I also discussed how our DxEnterprise software enhances this new technology and provided a live demo of the combined technology in action. If you would like a sneak peek of this session, check out the full slide deck and a summary of the Q&A session below.

Access the full recording here: https://dh2i.com/webinars/how-to-build-shared-disk-sql-server-clusters-in-azure/

Slide Deck PDF

Q&A Write-Up

Azure Disk Storage Focused

 Is there a limit on the number of nodes that you can present to an Azure shared disk?

 Different Azure shared disks have different limits. The maximum limit is between 2 and 10, depending on the disk type and size. See this link to Microsoft Docs for more information.


Can you increase or decrease the size of an Azure shared disk?

 Shrinking a disk is not supported, but you can expand (grow) a managed disk in Azure or add disks for additional storage space.


Is there any uptime SLA associated with disks themselves?

 Yes, there is and it is based on the various configuration options users choose. You can have disks hosted in multiple availability zones to increase uptime. Uptime ranges from 99.9% to 99.99%.


What happens to data when failing over a managed instance between hosts?

 The user data actually stays in the same location – only the owner of that particular disk changes. In other words, the data never moves as it stays in that shared location.


DxEnterprise Focused

Is there a limit to the number of platforms you can connect?

 There is no limit – we support Windows Server 2012 or newer, RHEL 7 and RHEL 8, RHEL Derivatives, and Ubuntu 16.04 and 18.04. So, if your organization has any servers running any of these supported operating systems you can use DxEnterprise.


What is the process to upgrade DxEnterprise?

 The process is fairly simple and can be done during production hours because of its ability to freeze nodes. For example, a user could freeze a node to turn off high availability (HA) for that node and then proceed to uninstall and reinstall the newest version of DxEnterprise. All can be done without taking an outage or using any downtime.


Do you need a specific version of SQL Server to use with DxEnterprise?

We support all versions that Microsoft supports. Click here to see a list of what Microsoft supports.


How is DxEnterprise Licensed?

It is licensed on a subscription basis per server per year. The subscription includes support & updates. We also have some offerings in Azure and AWS that allow users to only pay for their usage based on an hourly rate.


For any additional questions, please contact: info@dh2i.com