1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Hyper-V Advice Needed

Discussion in 'Servers and Enterprise Solutions' started by PiKe, Sep 10, 2018.

  1. PiKe

    Capodecina

    Joined: Oct 18, 2002

    Posts: 22,808

    Location: Lake District

    Hoping someone can help me with this one, currently I look after a fairly large site, split over 3 locations, each location is networked via leased line to the central location.

    Two of them have onsite servers running SBS 2011, support will be ending for this soon, so I'm looking into options, I would like to have a single server solution at the main site, but split AD/Fileserver and the Exchange server over 2 VMs, I would also like some resilience in the event of hardware failure, I understand this is possible with clustering, but I guess you really need a SAN for this to work effectively (if at all).

    Without a SAN, the AD Replication and Fileserver could be easily mirrored using DFSR, I'm not sure on the exchange side of things, would MRS work or would I need to use DAG?
     
  2. Throrik

    Wise Guy

    Joined: Sep 15, 2009

    Posts: 1,144

    Location: Manchester

    You wouldn't necessarily need a DAG, but it'd be handy. In the event of a disaster if you have two Exchange Servers you could always migrate the DBs/Mailboxes, but a DAG would be better.

    You don't necessarily need a SAN, you could have a mirror of all of your servers in one location on one HV Host and another on another HV Host in a different location and just allow replication to happen, obviously it's not as HA/Redundant as a multi-host environment with a SAN, but if you're not a big enough use-case for a SAN then that's fair enough. I would however suggest unless there's a reason you're unable to go Cloud, get away from on-prem Exchange, 365 will take that issue away from you.
     
  3. PiKe

    Capodecina

    Joined: Oct 18, 2002

    Posts: 22,808

    Location: Lake District

    Does a Hyper-V replica require manual intervention if the host server goes down?
     
  4. SoundsGood

    Wise Guy

    Joined: May 16, 2008

    Posts: 2,118

    Yes, it could be automated with some Powershell and an extensive list of safety checks
     
  5. Throrik

    Wise Guy

    Joined: Sep 15, 2009

    Posts: 1,144

    Location: Manchester

    I think any realistic replica without shared storage will require some form of manual intervention in this case?
     
  6. Liquidfox

    Mobster

    Joined: Sep 26, 2007

    Posts: 3,761

    Location: Newcastle

    Look into Veeam, it'll do replication to off/on-site targets so you can have a VM you can fire up if the worst was to happen. It's relatively cheap now that they've offered a subscription licence option.

    Definitely look into DAGs for your Exchange platform, should one of them fail the other DAG will pick up the work with zero interruptions to end users.
     
  7. PiKe

    Capodecina

    Joined: Oct 18, 2002

    Posts: 22,808

    Location: Lake District

    What is DAG licensing like? Is addition CAS licensing required as well?
     
  8. Throrik

    Wise Guy

    Joined: Sep 15, 2009

    Posts: 1,144

    Location: Manchester

    DAG licensing is included with Exchange - usually you would have two Exchange Servers or two Exchange Databases to create a DAG for HA/Resilience.
     
  9. PiKe

    Capodecina

    Joined: Oct 18, 2002

    Posts: 22,808

    Location: Lake District

    Do I need a witness server for a DAG to work? There are only going to be 2 hyper-v machines, no instances will be on bare metal so if the machine with the witness dies, what would happen?
     
  10. Caged

    Capodecina

    Joined: Oct 18, 2002

    Posts: 22,683