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Slow file transfer

Posted on 2014-12-30
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Last Modified: 2015-06-20
slow file transfer between VM and physical server
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Question by:laurenofis
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Expert Comment

by:rharland2009
ID: 40524230
Wow - a real ton of detail there...:-)

Starters:

What's slow? What's the transfer rate?
NIC connection speed on physical and VM (gig, 10GBe, etc.)
What OS are the physical and virtual boxes running?
Has this problem recently occurred? Were file transfers faster previously?
If so, what changed?
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LVL 37

Expert Comment

by:Neil Russell
ID: 40524242
Are the VM and physical in the same room/building/country/planet?

Might sound silly but it would at least be something to go on!
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Expert Comment

by:rindi
ID: 40524410
What is the HyperVisor you are using? VMware ESXi, Hyper-V, VirtualBox,....?

Depending on the HyperVisor you must make sure you have installed the appropriate Driver in the VM, for example VMware Tools if it is VMware, Integration services if it is Hyper-V, etc., etc.

Besides that, some HyperVisors offer different virtual NIC models, of which some perform better than others.
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Accepted Solution

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laurenofis earned 0 total points
ID: 40577326
We are using hyper v with dell poweredge R620's. The problem did get better after updating our drivers and firmware  from dell. The hypervisors are in the same rack with Teamed LANs through Windows Server Manager. We are using a mix of broadcom and Intel Nics. The preformance is fast between the hypervisors but considerably slower from the virtual guests. I will run some speed tests soon to get some real numbers.
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Author Closing Comment

by:laurenofis
ID: 40840853
This appeared to have worked previously but the problem was 100% solved by creating a new hyperV cluster, migrating the virtual machines over, then re adding the old hypervisors into the new cluster.
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