Hi,
im wondering about a blank Memory demand Value at a virtual machine on my Windows 8.1 with enabled Hyper-V Feature. Inside the VM the OS is Hyper-V Server 2012 R2. I tried to update the Integration Services but they are actual already. Here is screenshot of the Memory Monitoring i get in the Hyper-V Console:
Can you help me guys?
Thanks
Michael
I have a few 2008 R2 VMs on 2012 R2 Hosts that I'm unable to perform online backups for. They were originally capable, but now offline is the only available option.
I've gone through the following checklist and everything appears to be in order:
Is there something else I can look into to see why Hyper-V has determined this is no longer an option for the VM? I've also, moved and recreated the VM using the same disks.
Hi,
Can anyone help?
We have a 3 node Hyper-V 2012 R2 cluster with 2 x 1GB iSCSI NICs with MPIO enabled. We created a 127GB VHDX in one of the CSVs within the cluster, then from one of the Hyper-V nodes we copy the VHDX to the local system drive.
The copy begins with a transfer speed of around 200 MB/s and gives a estimated time of approximately 11 minutes. With about 5min 30sec remaining the transfer speed drops to about 25MB/s and stays there. During this time the hyper-v host is quite sluggish.
If the job is cancelled the node comes back to life and if the job is started again, exactly the same behaviour is displayed.
We have tried making sure its been run from the coordinator node with no different, we have tried disabling ODX and TRIM, we have tried with VMQ disabled and also with Recieve Side Scaling disabled but the behaviour is still present.
The server is a Proliant DL 880p Gen 8 and we have used the HP drivers that come with the latest SPP and also the latest Broadcom drivers from there website which supposed to have resolved issues with VMQ and we have the same behaviour with both.
From previous experience I think VMQ issues would cause the transfer rate to be slow all the time until disabled or working drivers are installed. ODX I think gives sporadic transfer speeds if that's an issue but this problem is very consistent. The transfer speed is very steady every time at about 192MB/s then always at about the same point in the file transfer the speed drops to around 25MB/s.
Any thing worth a try? Any suggests would be greatfully appreciated.
Hello everyone,
Before i begin, i would like to state what i am working with:
Windows server 2008 R2 (on both domains). Both are HyperV machines
Beyond that, not must else. I took over a new network system and I'm still trying to figure it out. I'm not a network person but I'm learning quickly about it.
My question is, when i want to create a trust between 2 forest (domainA.com and domainB.com) i get the following statement:
I know i need to make a forest to forest trust but i cant. It will ask me to do a realm trust or a Trust with Windows domain. Now, when i try to do that latter, i get error or "specified domain cannot be contacted".
I have read online about this being an issue with the DNS and firewall. But im not able to find any clear guides or instructions on how configure the DNS or firewall to allow for both domains to communicate. Like i said before, i don't have much experience on networking. Any help would be appreciated. Also, if you want some information from me, please ask and in a detailed way. As i state, still learning here.
Thanks
Wondering if anyone can help? I have noticed in a couple of Windows Server 2008 R2 Hyper-V scenarios, that the VM guests are often very slow. Disk access is especially slow.
In one situation their was only a couple of guest VMs, and they were running of mirrored IDE HDDs. Performance improved significantly when I used two mirrored SSD hdds instead.
My other main situation is where the VHDs are stored on HP Lefthand P4300, over 2-nodes with 8 SATA hdds in each, using iSCSI.
So I ran a few tests with robocopy copying 4-6GB of files (mostly large) or whole VHDs (40GB or more), using HP4300 SATA, a newer HP 4330 SAS, a THECUS NAS with SATA hdds, and an SSD in a THECUS NAS, and local SAS mirrored hdds. All using iSCSI except the local SAS hdds.
You can see from results that Guests run considerably slower than host. Any ideas?
Sample data (although not always same background conditions of load etc):
From within Guest direct iSCSI to same (from HP 4330): 34MB/s
From other Guest using VHD (from HP4300) to direct iSCSI (from HP4330): 14MB/s
From within Guest using VHD (from HP4330) to same: 9MB/s
From within Guest using VHD (from HP4300) to VHD (from HP4330): 11MB/s
From within Guest using VHD (from HP4330) to VHD (from HP4330): 19MB/s
From within Guest using VHD (from THECUS SSD) to same VHD (from THECUS SSD): 18MB/s
From within Guest using VHD (from HP4300) to VHD (from THECUS SSD): 13MB/s
From within Host from HP4300 iSCSI to HP4330 iSCSI: 12MB/s
From within Host using VHD (from THECUS SSD) to same VHD (from THECUS SSD): 40MB/s
From within Host from HP4330 iSCSI to same HP4330 iSCSI: 232MB/s & 132MB/s
From within Host from HP4330 iSCSI to HP4300 iSCSI: 40MB/s & 57MB/s
From within Host from HP4300 iSCSI to same HP4300 iSCSI: 26MB/s & 47MB/s
From within Host from HP4300 iSCSI to Guest VHD (from THECUS SATA): 15MB/s
Hi,
We are testing Windows 2012R2 Hyper-V using only one stand alone host without fail over clustering now with few virtual machines. Is it possible to add fail over clustering afterwards and add second Hyper-V node and shared disk and move virtual machines there or do we have to install both nodes from scratch?
~ Jukka ~
The host machine is running on Windows Server 2012 STD. and two Hyper-v machine running with dynamic HDD. one hyper-v machine HDD size increase as because of so many file copy in the hyper-v machine. and now i delete this file. But HDD hype-v machine size not reduce. So, how can i reduce the Hyper-v machine size. on that Hyper-v machine Exchange 2010SP3 running. the physical HDD getting space low. So, need to reduce the Hyper-v machine size.
Please suggest
Our team has kept scripts to automate our creation of VM machines. Since our VM environment is clustered, we have always used Volume GUID paths to point to the paths of the VHD and/or VHDX files for each of the VMs.
Since the GUID volume name contains a question mark, we've always gotten around this by doing a substitution of the question mark with a period.
For example, to create a VHD file, we have always done this.... The $vhdPath variable is the GUID volume path, which is identified earlier in the script.
New-VHD -Path $vhdPath.Replace("?",".") -Fixed -SizeBytes 70GB
After this is created, the script goes ahead and creates the VM
New-VM -MemoryStartupBytes 4GB -Name $VMName -SwitchName $SwitchName -Path $deviceid -VHDPath $vhdPath.Replace("?",".")
The $deviceid is the full GUID volume path, and the $vhdPath variable is the full GUID volume path, along with the VHD file name.
However, as we're trying to build VMs using Hyper-V 2012 R2, it appears that 2nd command, the creation of the VM itself, does not work anymore.
It complains that 'The network path was not found'. It seems to think, now that I changed the ? to a ., it thinks it's a UNC path of some sort.
However, the 1st command, the creation of the VHD file, still works correctly; no complaints there.
I find this really strange as the New-VHD command is successful; as I've verified that the VHD file gets created.
It's only the 2nd part, when trying to create the VM and pointing to the VHD file on the same guid volume path, with the exact same substitution, is when it fails.
This part has always worked when we are using Win 2008R2 Hyper-V and Win 2012 Hyper-V...
Any ideas?
Could you please share your best practices for setting up a new Windows Server 2012 r2 Hyper-V Virtualized AD DC, that will be running on a new WinSrv 2012 r2 host server. (This will be for a brand new network setup, new forest, domain, etc.)
Specifically, your best practices regarding:
the sizing of non virtual and virtual volumes/partitions/drives,
the use of sysvol, logs, & data volumes/drives on hosts & guests,
RAID levels for the host and the guest(s),
IDE vs SCSI and drivers both non virtual and virtual and the booting there of,
disk caching settings on both host and guests.
Thanks so much for any information you can share.
I have setup 3 server with windows hyper-v server 2012 R2 & currently i am managing them from remote management.
now i am thinking take all 3 hyper-v in domain network to use "Nothing shared Migration"feature which is in hyper-v 3.
can we do this with hyper-v server 2012 R2. i want to that my users can keep access there vps from anywhere and in case of any issue take place in my network then i can move my VPS to another hyper-v server and mean while user keeps accessing them. is it possible.
Akshay Pate
Hi,
we have difficulties with Time-Sync in a Server 2008 R2 Environment, running the FSMO-PDC-Role as a VM on Hyper-V (time is false, Server marked as falseticker, Event ID 50 ...).
ther are many articles by MS about the Hyper-V time integration Services - pro and con.
Ben had recommend the time Integration ins his blog and said that he will discuss the different recommendations with other MS-Teams. This has been in 2010 - is there any result? What is today the recommendation? Is it the same for 2008r2 an 2012R2?
I would be happy to hear someting from Ben or someone else out of the Hyper-V-Team.
Thanks
Best regards Thomas
Hi Experts
I need to know some basic idea about Capacity planning for Hyper-V which requires Capacity Planning for Hyper-V individual host and Cluster.
I got attached info on websites but still not clear. Can someone link me to an effective website or help me to calculate the required sizing. W
Regards Suman B. Singh
Hi guys,
we are using three node cluster with Windows Server 2012R2. Our virtual machines are virtualdesktops with Windows 8.1 guest OS, 4 vCPU and 8 GB of dynamic memory.Sometimes dynamic memory stops working, guest OS is not able to allocate more RAM and starts to swap. This swapping slows performance of all our virtual machines, sinceall virtual machines are on same cluster shared volume. This happens at random RAM amount allocated, for example at 2.6 GB,which is way below our 8 GB limit.
Live migration helps to solve this issue for migrated VM, after live migration the guest OS is able to allocatemore ram and starts to work properly, swapping disappears. However after some time, problem appears on other VM.
Our physical machines have 2x 10core Xeon and 394 GB of RAM. Only about 30% of RAM is used, so there is free space for all virtual machines. But we need to solve this issue so dynamic RAM starts to work properly.
Do you have similar experience?Hi Guys
I want to use client hyper v in windows 8 Professional
There is a legacy application that runs on xp and uses a serial port
So the xp machine will be a virtual, can client hyper v support com port so that the application will work
Hi guys,
I am using a 3-node WS 2012 R2 Hyper-V cluster. For all virtual machines I enabled resource metering. However, on a random basis Measure-VM stops displaying numbers, it just returns blank fields instead of values...resource metering is still enabled on a VM, but all values are empty. This happens to random VMs, while resource metering for all other VMs keeps working properly.
The only workaround is to disable & enable resource metering, however this resets values which is obviously a problem.
Has anyone had this problem?