Hyper-V vs VMware VM Export Speed?


I have noticed that exporting a VM using Hyper-V is much much much...much faster than exporting a VM to OVF, using VMware.  This is in an environment where the servers, network, NAS and configuration (IE local data stores are hard drives) all being equal.  

When I export a VM to a our NAS over a 1GB switch connecting directly to an ESXI host using Vcenter Client, the process always uses no more than 18.75 MB/s over the switch when I watch it.  However when doing the same thing by RDPing into the Hyper-V host and issuing a powershell command to export a VM to the same NAS, when I watch this transit the switch I am seeing speeds at about 87.5 MB/s to 106.25 MB/s.  Needless to say (but I did anyway), this later scenario export completes much faster.

Does anyone have any ideas why this is so?

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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Remember two things happen, when you Export to OVF from VMware vSphere (ESXi).

Try a copy, or vmkfstools from the console of the ESXi server to NFS datastore on your NAS (which is now the only supported function, e.g. CIFS has been removed), and see if the speed is similar.

It send's it to the client, and client sends it to NAS, two data paths or channels. (two data copies!).

Hyper-V just copies it direct to NAS.

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CnicNVAuthor Commented:
Ok, this makes sense.  Also, I will look into using vmkfstools via ESXI console and the commands required to export a VM to the NAS via NFS.

Thanks again :-)
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