• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 101
  • Last Modified:

Exchange DAG and vMotion

Experts out there, Does vMotion supported on Exchange VMs whether it is planned or automated?
0
sara2000
Asked:
sara2000
3 Solutions
 
Schnell SolutionsSystems Infrastructure EngineerCommented:
This is supported and it will bring you HA.

However, the preferred method is to use the Exchange DAG as far as with the DAG Exchange is aware of the DBs consistency and takes care of it. With VMotion the Hypervisor will be pending just of the VM OS, but not the applications running on it.

Additionally that it is supported, it can work both planned or automated.
0
 
Adam BrownSr Solutions ArchitectCommented:
It is supported on the following VMWare Versions: https://www.windowsservercatalog.com/results.aspx?&bCatID=1521&cpID=11779&avc=0&ava=0&avt=0&avq=0&OR=1&PGS=25

As long as the requirements in this article are met: https://technet.microsoft.com/en-us/library/jj619301(v=exchg.150).aspx
Pay specific attention to the statements regarding VM Migration, clustering, and HA.

Note, MS will note support versions of Exchange prior to 2013 on VMs. If you want to know about Exchange 2010 and vMotion, basically, it's not supported. On 2013 and 2016 it *might* be supported, as long as the configuration is correct.

If you're using a DAG with 2013 and later, don't bother with vMotion, though. Use a Load Balancer to balance your VMs or do manual DNS record changes for failover. I say this because vMotion is a Hardware level failover solution, while Exchange's native DAG HA capabilities are Software level HA, which will provide HA capabilities for a much larger variety of issues. Don't mix vMotion and Exchange native HA capabilities. It may be possible to do so, but it is superfluous.
0
 
sara2000Author Commented:
Thank you for the quick reply.
We need to patch the Esxi hosts from time to time. In this case, we have to perform vmotion(Enter into maintenance mode). I wonder whether DAG will failover during the vMotion?
0
 
Todd NelsonSystems EngineerCommented:
Assuming one (but not all) of the Exchange DAG members resides on the ESXi host you will be perfoming maintenance, you do have an option to put specific DAG members into maintenance mode as well if you are concerned about an unexpected failover.  Personally, I would recommend it.

http://mikepfeiffer.net/2010/08/performing-maintenance-on-dag-members-in-exchange-2010-sp1/
http://exchangeserverpro.com/bother-running-dag-server-maintenance-mode-scripts/
0
 
Todd NelsonSystems EngineerCommented:
sara2000,

What is the status of your request?
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now