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Apr
22
comment Hyper-V Manager shows 3 sockets/NUMA nodes available but there are only 2
By default, the VM will match the physical machine. I doubt, however, this is how his physical machine is built. I suspect somebody played with the values in the settings.
Apr
22
comment Hyper-V Manager shows 3 sockets/NUMA nodes available but there are only 2
Respectfully, this answer is just speculation, and it's not correct. See my response to the question.
Feb
25
comment Is it possible to run production machines on a replication target?
Actually, the replication target will see more or less as many writes to its disks as the primary host saw. So it's not just network bandwidth that gets consumed. You need enough storage throughput, too.
Feb
9
comment File Sharing using Hyper-V Shared VHDX
Whether a SAN is turning a pile of disks into a volume or whether that's done with Storage Spaces is of no particular relevance to this discussion. My point is that you will be much happier with a file server.
Feb
8
comment File Sharing using Hyper-V Shared VHDX
The thing that you really need to know is that CSV works by using SMB (the file server protocol) to move data whenever the node in question doesn't own it. So joining several computers together with CSV basically does the same thing as a file server, except in one special situation: When you have a really big file that is exclusively owned by one node, that node can read and write to it directly, provided that the file isn't being changed in size -- i.e. the data in it is being re-written. This is exactly what Hyper-V and SQL Server do. File servers are really good at small files.
Feb
6
comment File Sharing using Hyper-V Shared VHDX
If you create a guest cluster and put CSVFS on top of it, then all the members of that guest cluster will see that (virtual) disk as a local disk, and they will all share it, seeing the files on that disk symmetrically and safely. But so what? The only point in doing that is so that you can run a Scale-Out File Server on top of that, or a SQL server on top of that. If there was any other purpose, then you'd be better served by just giving the VHD to a single VM and using that VM as a file server.
Feb
6
comment File Sharing using Hyper-V Shared VHDX
Yes, I am. Your link is a cookbook for creating a cluster of guest VMs running Windows, but there are other possible uses, all of a similar nature.
Jun
4
comment Dell VRTX - slow cluster shared storage
Yes, that's why I made a distinction between local caching and coherent caching.
Jun
3
comment Dell VRTX - slow cluster shared storage
If you actually did turn on local caching in the controllers, that would invalidate the cluster file system that you're trying to use, which is probably why you're not seeing the option to do it. If you want to use CSV, any caching has to be coherent across all the hosts that have access to the volume.
May
15
comment Convert Folders to VHD file
If your files are corrupted, then they'll still be corrupted when you convert the volume to a VHD. If they're not corrupted, then ROBOCOPY will work nicely.
May
15
comment Restoring a VM from a backed up snapshot in Windows Server 2008R2
No. It can be backed up while it's running. If it has the Backup Integration Component installed within the VM, the VM will actually keep running through the whole process. If not, it's is paused briefly.
May
13
comment Restoring a VM from a backed up snapshot in Windows Server 2008R2
I think that you missed my point a little. Even in Server 2008R2, when you ask for a backup of a VM (which very much does exist as a feature) what it actually does is create a snapshot of the VM and then allow you to copy that snapshot to other media. It just doesn't label it a "snapshot." It's labeled as a "backup."
Apr
28
comment reached the maximum partitions on my virtual machine
And why are you creating a new partition when you do extend the disk, rather than just extending an existing file system?
Mar
24
comment How to exclude VHDX disk from snapshots on Hyper-v
No. While the VM is powered off, there is no memory assigned to it. Of course, if your VM is powered off, then the file systems have been shut down cleanly and there's no danger of corruption. If you wanted to exclude a VHD from a snapshot while the VM was powered off, you could remove it, take the snapshot, and re-add it. (I know that you'd like that to be one step, but I don't have a better suggestion. It would be a single line of PowerShell code if that's any condolence.)
Mar
5
comment Correct VHDX sector size in Hyper-V enviroment for a RAID array
Those are tiny. I doubt that you'd see much difference.
Dec
2
comment Windows Server 2012 Hyper V Clustering Live migration Hot Failover
There are actually several commercial products that do exactly what you're saying isn't possible. They work by, essentially, continuously migrating the machine to a new host, so that if the primary host fails, the secondary can pick up where the first left off. See the various offerings from Stratus for good examples of this.
Oct
11
comment Hyper-v on 2012R2 startup gen1 vm causes the host to freeze up
You didn't have VMware Workstation and Hyper-V installed simultaneously, did you?
Oct
9
comment Hyper-V Dynamic Memory - virtual machine memory usage and host memory demand do not make sense
TomTom, I'm quite certain about how it works. (The guy who wrote the code is sitting two doors down from me at the moment.) Adding of memory beyond the "startup" value does, in fact add new memory to the VM. That memory can't be removed from Windows entirely, at least not without causing all the device drivers to be rewritten. So it's ballooned.
Oct
4
comment Disk latency within a virtual machine
No, I'm not suggesting they're useless. I'm merely pointing out that time within a VM is virtualized, and thus measurements of anything that tries to look at small time quanta will result in messy data. Data you collect over long periods of time will be generally right. Looking at any small-span time period may not be accurate.
Oct
3
comment Disk latency within a virtual machine
I'm not sure what your terminology is getting at. Yes, CSV is the file system that is typically used for VHDs, and that sits on a volume, which is shared across the host cluster. That volume sits on top of a LUN, which is part of a disk pool, usually (with Server 2008 R2) in a SAN. What, specifically, are you asking?