Super helpful - thanks CFee From: [email protected] [mailto:[email protected]] On Behalf Of J- P Sent: Wednesday, January 14, 2015 2:16 PM To: NT Subject: RE: [NTSysADM] hyper-v Volume
Yes, If you read my second post , this was specifically on an 08 server ENVIRONMENT My Hyper-V hosts are Dell PowerEdge R520, utilizing Broadcom NetXtreme 1Gb NICs and running Server 2008R2 SP2. Firmware/drivers all up to date. The issue has only ever existed on the guest VMs, never the host nor any other baremetal box. RESOLUTION There's this little thing called Virtual Machine Queues. In short, it increases overall throughput for VMs by offloading virtual network processing to the physical adapter. Read more here.<http://www.dell.com/downloads/global/power/ps1q10-20100101-Chaudhary.pdf> Prior to stumbling across that article, I had actually stumbled upon a resolution that basically solves the issue by simply disabling VMQ on the physical adapters assigned to the VMs. But I started reading about VMQ and I wanted it! So I then found the above article and realized the problem: Broadcom has VMQ enabled by default, however, there is a registry value that needs to be added first for VMQ to function properly. Without the registry value, you get the problem of slow network performance. Jean-Paul Natola ________________________________ From: [email protected]<mailto:[email protected]> To: [email protected]<mailto:[email protected]> Date: Wed, 14 Jan 2015 14:02:04 -0500 Subject: RE: [NTSysADM] hyper-v Volume The KB only refers to 2012 host. Does anyone know if the same is true for others (2008/2008R2/2012R2) ? CFee From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of Jameel Sarangi Sent: Tuesday, January 13, 2015 6:32 PM To: [email protected]<mailto:[email protected]> Subject: RE: [NTSysADM] hyper-v Volume Was going to suggest the same thing. Dell servers experience this issue last I checked. Jameel Sarangi VP Operations From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of CSSU NetAdmin Sent: Tuesday, January 13, 2015 4:08 PM To: [email protected]<mailto:[email protected]> Subject: Re: [NTSysADM] hyper-v Volume This might not help but we had a similar problem a month ago and it turned out to be an issue with a Broadcom nic driver. We resolved it by disabling the virtual machine queue on the nics on the host. Here is the kb<http://support.microsoft.com/kb/2902166> we followed. On Tue, Jan 13, 2015 at 4:21 PM, J- P <[email protected]<mailto:[email protected]>> wrote: Hi all, I have a 2012r1 guest on a 2012r1 host that is a file server. long story short, the server behaves sluggish when logged on and trying to do anytjing- I have checked all the logs (both host and guest, both windows and perc logs) everything is up to date no errors . NOTE: file and folder access over the network is fine according to the users (to be fair the previous server was a single.cpu sata mirror with 4gb of ram) so it's not like they have a good baseline to compare. Anyhow , can create a new guest and attach the existing data volume from the sluggish guest AND retain the same ntfs and share permissions? tia
