Hi everybody!
In process of migrating to Hyper-V from ESXi I encountered really strange problem that cannot resolve it by myself...
I have "Whitebox" server for testing only, on ESXi 5.1 all worked great.
I installed Server 2012 standard and 2 2008 R2 guests on it.
Underlying storage is RAID 10 with read up to 250 MB/s and write speed up to 130 MB/s.
I have 2 NICs one Intel GT 1000 PRO and one onboard Atheros, both 1 Gbps.
On host I disabled Atheros, with Intel I created one External vSwitch for VMs and server management (like I had on ESXi)....
The OK part:
1. Test ISO file, 5 GB in size
2. If I copy this file between VMs I get speed 116 MB/s
3. If I copy this file from VM to HOST I get speed 211 MB/s
4. If I copy this file from HOST to VM I get speed 117 MB/s
The NOT OK part:
5. If I copy this file from HOST to my WORKSTATION I get speed ~50 MB/s
6. If I copy this file from WORKSTATION to HOST I get speed ~50MB/s
7. If I copy this file from VM to my WORKSTATION I get speed ~50 MB/s
8. If I copy this file from WORKSTATION to VM I get speed ~50 MB/s
This same server under ESXi 5.1 control copied files over network with 110-120 MB/s !!!
So my question is, how come Server 2012 and its guests perform 1/2 slower over the network than ESX?
Switch is also gigabit and proven working (transfers between 2 WKS are 109 MB/s)
Any idea?
Thanks!