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56

This used to be true, but is no longer exclusively true. What they are referring to is Strict Co-Scheduling. Most important of all, while in the strict co-scheduling algorithm, the existence of a lagging vCPU causes the entire virtual machine to be co-stopped. In the relaxed co-scheduling algorithm, a leading vCPU decides whether it should co-stop ...


13

This largely depends on the underlying hypervisor and the admins who run it, let me explain: It's bad practice to just arbitrarily give you 4 CPU's just because you requested it. Generally speaking, you think you need 4; but resource monitoring says you only need 1. VMware ESXi for example requires locking all pCPUs when a vCPU makes a request for CPU ...


6

Is it possible to plug 10 cat5 (network) cables that come from 10 different DSL modems to an HP server so I have 10 different broadband lines connected to one single server? Yes, it's a terrible idea but yes you can. If so how? Buy some multi-port NICs Any suggestions from geniuses in Networking? A hint of sarcasm there but I'll rise ...


5

ESXi doesn't support hot-removing memory or CPUs from a VM. Someone I met in the pub a couple of months ago told me that the sister of a friend of his cousin *cough* got the answer that virtually no customer demands this feature. In other words: It doesn't pay to bother implementing hot-remove. If you want ESXi to support this, go to VMware and tell them. ...


4

The MAC address of the virtual server is used throughout; typically the host uses transparent bridging to forward packets to the virtual adapters it is hosting. As is normal for a bridge, it forwards packets without changing the MAC address. It's also possible to connect virtual servers via virtual routers, NAT, load balancers etc. In that case you may not ...


3

Conditional application of Device Drivers is great because 1) it is much more accurate and 2) it is much faster but testing it is hard. What I would do is write out each condition as if you want it to apply to the target hardware and then modify them so they will return true when the Task Sequence for OSD runs against your Virtual Machine. For example: ...


2

hyper-v management console, connect to it.


2

I can not say for sure in vmware, but when using kvm decreasing memory of a running virtual machine works fine. Of course up to a limit, but the software will tell you. When you decrease it the memory in the virtual machine will gradually be lowered, until it can't be lowered any further. If you set the memory to be lower than where it stopped you will need ...


2

You can set up port forwarding on the physical machine, so that some physical machine's port in physical network is forwarded to the VM SSH port. For example if the physical machine is 10.10.10.1 and VM network 192.168.0.0/24, then port forwards can be like this: 10.10.10.1 port 225 forwarded to 192.168.0.1 port 22 10.10.10.1 port 226 forwarded to ...


2

Yes, the statement makes sense in general. However, it's something you should test for your exact configuration and workload though. Sometimes more CPUs is better if you can actually take advantage of them. However, if you don't actually have that much parallelism, a VM configured with less CPUs will often perform slightly better as it avoids slowdowns ...


2

To give you a very simplified answer: The physical NIC in the host is acting as a "bridge" or "passthrough" between the virtual switch and the physical network. There's no virtual MAC to physical MAC mapping whatsoever. For a virtual switch that isn't also being used for management of the hypervisor itself, there doesn't even need to be an ip address ...


2

Just use the DHCP management console to set the router that is set in the DHCP responses (to the address of the Linux server).


2

You back it up like you would a physical server, and conversely, restore using actual system state backups and not snapshots and VHD copies. Invocation ID When you perform a System State restore on a Domain Controller, the invocation ID automatically changes - letting other Domain Controllers know that this is technically a "new" database replica. If, on ...


2

100% is totally fine. Wherever you read it damages the processor -those are idiots with no proper cooling. Whether 100% CPU utilization is acceptable depends - on the task. Yes, the computer will get sluggish. So what? If the job of the server is to finish calculating something then I rather have him use 100% of the CPU than take longer. Acceptable CPU ...


1

From what I understand, vGPU requires support at various layers. Hardware - only specific GPU's support vGPU functionality. Hypervisor - Citrix and VMWare are the only ones that I am aware of that support vGPU functionality. I'm not aware of anything in the full/free/open source Xenserver that provides this. VDI - The method you use to connect to the ...


1

If you want a drop-in replacement, with minimal downtime, you had to copy the entire virtual disks on another, similar hosts. Basically, you must: snapshot the host's LVs copy the virtual disks on another similar host copy the virtual machine definition files (.xml) to the other host If your virtual disks are normal image files, you can copy them using ...


1

You will not damage the processor. There is no advisable CPU usage. You use whatever you want. There is no source of that, i am telling you that from experience. The slowing of processes running is another thing. If it is a multi user server you have to reconfigure it.


1

Add the additional IPs as IP Alias Virtual IPs. Then configure 1:1 NAT to ensure that traffic to/from each of your servers is mapped properly.


1

I had similar symptoms, not on a VM but a Win7 Laptop. Taskmgr.exe and other processes (like Winmerge.exe) were taking 13% of cpu (one out of 8). The issue was temporarily alleviated by restart, so I was doing that a lot. After long time investigating it, I figured that that Webroot Secure Anywere (software for virus and other types of protection) ...


1

After testing stuff out and googling found that it was network issue and was happening because of VQM and Broadcom Network Adapters. This post helped me solve it: http://www.reddit.com/r/sysadmin/comments/2k7jn5/after_2_years_i_have_finally_solved_my_slow/ Had to enable VQM everywhere and create registery value BelowTenGigVqmEnabled with value of 1 in ...



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