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Hyper-V Replica Vs Hyper-V cluster

Posted on 2014-04-16
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Last Modified: 2014-11-12
Dear All,
I have Hyper-V replicas configured in 2 windows2012 R2 server for a VM
I need to setup VM in Node1 failover to VM in Node2 automatic.

I tried Hyper-V replica first as one of my friend told me replica will do your job.
Now I came to know replica will not do automatic failover.

Does anyone think Hyper-V cluster will do my job?
Server is like fileserver as our application is based on flat file system
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Question by:-MAS
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Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40003801
Hyper-V Replica, is simple, it copies/mirrors a VM to another Host, if your Host A VMs, fail, you can turn on your replicas. (no requirement for shared storage) on Host B, and you will have lost all the changes since last replication.

Hyper-V Cluster using shared storage supports Live Migration and HA, in the event, a Host fails, VMs will be restarted automatically on other hosts.

So yes it will do it, but there will be small amount of downtime, e.g. less than 2 minutes, whilst the VM is restarted again. (with all your data saved).

You will need to configure Shared Storage and Cluster Shared Volumes, and Failover Clustering.

So it's a small amount of downtime, ok?
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Author Comment

by:-MAS
ID: 40003823
-->You will need to configure Shared Storage and Cluster Shared Volumes, and Failover Clustering.
I am not clear about shared storage and shared volumes.

As of now both the nodes has its own HDD.

Is it mandatory to have a SAN or NAS?
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LVL 119
ID: 40003863
You need shared storage, this can be a NAS, SAN or recently with Windows 2012, this could be SMB3 CIFS share. (which is supported for VMs and Clustering)
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by:-MAS
ID: 40004129
Is it possible to use Hyper-v Replica broker to failover automatic?
If yes how?
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Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40004142
Hyper-V replica needs to be manually failover and failed back.

It's poor mans' DR!
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Author Comment

by:-MAS
ID: 40011372
I request to keep this question open as I saw in a place with automatic failover.
I am  trying to accomplish the same here
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LVL 119
ID: 40011590
Failover Clustering will provide that function.
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Author Comment

by:-MAS
ID: 40014100
Can you provide a URL to configure step by step?

Is it mandatory to have a shared storage?
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Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40014176
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Author Comment

by:-MAS
ID: 40014231
I have 2 windows2012 R2 servers . Is it possible to have automatic failover using the above URl?
if yes please send which is relevant for my req
0
 
LVL 119
ID: 40014319
Yes, it is possible.

ALL URLs are relevant.

You need to

1. Build a Failover Cluster.
2. Using SMB3 for storage of virtual machines.

Do you have a third Windows 2012 R2 Server that can act as the SMB3 file share?
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Author Comment

by:-MAS
ID: 40014461
I have only 2 servers which is 2012R2

Is there any workaround if I have only 2 servers.
bcz I saw a video in Youtube it fails over automatic
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LVL 119
ID: 40014503
If you only have two servers, it's difficult because you have no shared storage, in Windows 2012 R2 you can use a Windows SMB3 share as shared storage, but it's no point, creating shared storage on a host which could fail.

So we are back to no shared storage no cluster, no failover.
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Author Comment

by:-MAS
ID: 40014509
What will happen if the storage fails?

I think that is a single point of failure.
Am I right?
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LVL 119
ID: 40014525
That's correct.

All VMs will fail because that is where they are stored.
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LVL 25

Author Comment

by:-MAS
ID: 40014532
I think manual failover is better than the one I am trying to achieve.
What is your suggestion?
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LVL 119
ID: 40014539
With the hardware you currently have, manual Failover, is all that you will be able to achieve.

Which is better than none at all.
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Author Comment

by:-MAS
ID: 40027243
I've requested that this question be closed as follows:

Accepted answer: 166 points for hanccocka's comment #a40004142
Assisted answer: 167 points for hanccocka's comment #a40003801
Assisted answer: 167 points for hanccocka's comment #a40014176
Assisted answer: 0 points for abbasiftt's comment #a40014509

for the following reason:

Thanks a lot
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Author Closing Comment

by:-MAS
ID: 40027244
Thanks Andrew
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