How to Backup VM on Hyper-V Fail over environment .

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3 nodes on Hyper-V (Windows Server 2012 R2 standard)

all nodes have be installed Windows & Hyper-V Agent (version 12.5.8690)

1 shared storage, each node have own volume for store VHD file.

here is the Situation:

backup location: Share Folder

backup source: VM1 (owner is Node 1)

VHD of VM1 stored on the Volume1 that owner is Node 3.

how to let backup data flow go straight from Volume1 on Node 3  to Share Folder?

my test result always is the backup data flow go Node1 from Node3 , then Node 1 go to Share Folder.

It's really waste network throughput and spend more time to backup VM1.

 

 

Anhang Größe
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Di, 12/26/2017 - 09:13
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Hi Kevin,

The behavior in your case is by-design one, since the data is always read from the node which is the owner of the CSV volume. This would be the case when you have pure Microsoft-based setup of CSV, e.g. without involving a 3rd party SAN. With external SAN it is possible to use corresponding (provided by SAN vendor) hardware VSS provider which allows (while default software VSS provider by Microsoft does not) to read VM data from the VSS snapshot directly from the node where the VSS snapshot was called from, thus eliminating the excessive network consumption.

An alternative solution would be to change the volume ownership to the node which owns the VM via pre/post commands (Backup Options->Pre-post commands) executed before the backup, so that the data is read directly from the node where backup is initiated. In this case a separate backup plan should be applied to each of the Hyper-V nodes, since these commands are executed per-plan, e.g. if you include all VMs from all nodes into a plan, then pre/post command will run only once.

Thank you.

Di, 12/26/2017 - 14:19
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