We have recently purchased the new server having 16 GB of RAM. We have created 5 virtual machine. Out of these 5 virtual machines three are windows VM and the remaining two are Linux VM.
We have been contsantly facing the poor response of the virtual machines and the network / infra team is not able to tell us the root cause of the problem and providing the solution.
Can you please let me know what could be the possible cause of the slow down.
Additionally, we want to have the audits conducted to see if the infrastructure / network for our company has been setup correctly. Can you please let me know what are the typical audit parameters we evalluate for the best performance of Network and SYstems resources.
Thanks for the help.
Memory (RAM) is being distributed among so many VMs, each VM has very less RAM available for its own use.
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Good day! I have about 700 virtual machines running Windows 2016. We are using vmvare 6.0. Need to know the last login of users? How can i do this?
all virtual machines are separated from each other, there is no domain.
Thank you all!
Need to know the last login of users?
If you are referring to log in of users to the 700 Virtual Machines (VMs), ESXi and all Virtual Machine Monitors (VMMs) regard VMs as "black box" sources of load. They don't know how many users are logged in to a VM nor what they are doing. VMMs deal in CPU usage, disk usage, network load and so on. In fact the best way to think of ESXi's view of the system is to consider what the view of the system is from the standpoint of the (Pentium) processor. It also has no idea how many users are logged in or what they are doing.
At the moment the task is not relevant, thank you all
As a very beginner, I only know how to create VMs and install OS on these using Oracle VirtualBox. All the VMs created are dependent on the hardware resources (CPU, RAM etc.) of a single machine. If the machine goes down the VMs will go down. Need to know how VMs can be created using taking resources from different physical machines (manually or dynamically) to avoid failure of any VMs.
For example: There are 4 physical machines having 8 core and 16GB RAM each. Now, I want to create three VM having having 8 core and 16GB RAM taking from different physical machines. If one physical machine goes down, no VM will be down.
You can look up clustering solutions (e.g. VMware clusters, or Hyper-V failover clusters). In this model, if a physical host goes down, then the virtualization platform will power up the VMs on other hosts.
If you're looking for zero downtime, then VMware has something called Fault Tolerance in which a shadow copy of a VM is running on a different host and is continuously synchronized with the primary copy. If the primary host goes down, the shadow copy can take over with zero downtime (e.g. you don't have to boot from the shadow copy because it's already running). This feature, while cool, has a lot of real-world limitations in how it inter-operates with other features of VMware. For example, as of vSphere 6.0, you cannot do various kinds of migrations for such VMs, etc. I believe it also requires a more expensive license.
These solutions generally require some shared resources between the physical hosts (most notably storage). Otherwise they will not work (or at the very least, performance will greatly suffer).
I need you to solve big problem of mine. I've created an IIS smooth streaming application to deliver the media content.
I'm using azure windows virtual machine, small instance (CUP 1 Core), as a media server. I installed IIS Media Services on vm(Virtual Machine) and I'm creating publish points on it.
The number of users are too many and load on vm will be increase. So, I decided to go with the Load Balancing/Auto Scaling options. Well I'm doing this first time.
Here is my media server architecture:
I want to implement 3-tier architecture, like I'll create 3 virtual machines and want them communicate each other to balance the load. I mean if load increase on vm-1 then load will be balance with vm-2 and/or vm-3. Also I want to auto scaling of vms.
How can I do this?
Thanks in advance
Devendra
to do so you can create an availability set where you can join the 3 VMs , here are some resources I think they will be very beneficial
"managing the availability of the Virtual Machines" http://www.windowsazure.com/en-us/manage/windows/common-tasks/manage-vm-availability/
here is a second one for the load balancing I think it is a bit like the first one: http://www.windowsazure.com/en-us/manage/windows/common-tasks/how-to-load-balance-virtual-machines/
for the scaling I think it is still in the preview, you can test it by adding this feature to your account. after that you will be able to access it in your cloud service after creating the Virtual Machines required.
Is virtual PC practical on a home personal development computer. I do some custom .net programming at home and I was wondering if in terms of performance and overall use, Virtual PC is useful. Do the applications inside Virtual PC session run slower. It will help me with my personal dev machine. Would you recommend any other products?
In my estimation virtual machines are one of the best tools that a developer can have. I have my base dev machine and on it I run VPC for different platforms to test installations and application functionality. For web development I keep VPC;s running each of the major browsers that I support, so I continually test my websites on various browsers. I even still maintain an old VB6 app and I have replicated my old VB6 build environment to a VPC image. Make sure you have lots of RAM. My machine runs with 4GB and that works well for most everything I need. I also have Sourcegear Vault set up for source code management. I have the clients loaded on the various VPC's that I use for development and they all check data in and out from my central SQL Server box. It works great.
It really depends on what your home computer is like. I've used VPC to test different versions of Visual Studio (e.g. to make sure that a solution is VS2005 compatible, and to check out VS2010).
I wouldn't want to use it all the time, but then I am working on a laptop. Given a really meaty multicore home desktop (preferrably with hardware support, of course, and lots of memory) it could be reasonably practical for day-to-day use.
VMWare Player is free and some people find it faster - I haven't used it enough to compare the two properly myself. If you're spend a lot of time "in" the VM, it would probably be worth giving both a proper test-drive.
VPC is a very good choice. I use it to test deployments and for presentation purposes.
If you have a PC with a new Intel chip and at least 2 gigs of RAM it actually works just as fast as a regular PC would :).
I recommend 4 gigs of ram though, they're cheap as hell these days and it really matters.
I've had some success with this; I had to develop some older .NET 1.1 software on Vista, which wasn't supported. I had to run XP in a virtual PC container in order to get the project done.
The biggest issue was available RAM; I'd recommend maxing out your home PC to use as much as it can- this will likely be less than 4GB unless you're running a 64Bit OS. I found that getting an extra gig of ram made life much better. Ram is cheap right now, so I'd start there if it didn't work well enough for me at first.
Yes applications will run slower but the hit isn't as big as you might expect. It is pretty reasonable to do development on a virtual machine. Obviously the performance is relative to how fast your computer is, a mulitcore machine will do nicely.
If you develop driver or core routines, where every mistake can and usually will result in a crash. A VM is the best you can use.
I tried Virtual PC and VMWare. They are both pretty good for such stuff.
Virtual PC should be fast enough, unless your driver or code is really time sensitive. A cross-platform, free alternative to Virtual PC is Virtual box.
If you've got a VirtualPC license already, by all means use it. If not, you might have a look at Sun's VirtualBox. It's Free/Libre and cross-platform. I use it to run windows and linux on mac os x and linux and have been quite happy with it.
You can run your dev tooling natively on your pick of O/S. and use VM's to test on other environments. Get lots of memory if you're going to do this, say 2GB or more - if you haven't already.
AMD chips have some facilities (nested page tables etc.) that improve VM performance. 2nd gen Opterons and some Athlon 64 chips will support this for reasonable money. You can even get brand-name hardware like an HP XW4550 with this sort of chip for fairly reasonable money. I'm not sure to what extent Intel has caught up with this yet.
Assuming your host machine has enough raw power then a virtual machine works fine. I have a 2.5GB ram, 2Ghz duel core work laptop and don't want to install vs2008 for personal development so have a virtual machine for that. I've given it 1 GB of dedicated memory at the moment and it runs great, no problems. If needed I'll up the ram allocation but for now I'm happy.
Hope this helps :-)
I use VirtualBox for all development and find the performance much better than VPC. My machine is about a 2 year old dual core with 4gb ram and performance is not noticeably slower than running natively. The virtual machines are Vista and the host OS is Windows 2008. I would definitely recommend using virtual machines as creating a fresh new machine for a new project is very easy.
I have a toshiba notebook with 2Gig of Ram. I am wondering if its worth to install Virtual box and use it to browse web, do quicken, some small dev work etc.? How would I install Windows OS on virtualbox virtual session? Are there good tutorials out there? Would 2gig of ram be enough to run virtual sessions on notebook computer with following configuration:
2 gig of ram
Intel Pentium 4 cpu
60 gig hdd
I'm looking into using virtual machines to host multiple OSes and I'm looking at the free solutions which there are a lot of them. I'm confused by what a hypervisor is and why are they different or better than a "standard" virtual machine. When I mean standard I going to use the benchmark virtual machine VMWare Server 2.0.
For a dual core system with 4 GB of ram that would be capable of running a max of 3 VMs. Which is the best choice? Hypervisor or non-hypervisor and why? I've already read the Wikipedia article but the technical details are over my head. I need a basic answer of what can these different VM flavors do for me.
My main question relates to how I would do testing on multiple environments. I am concerned about the isolation of OSes so I can test applications on multiple OSes at the same time. Also which flavor gives a closer experience of how a real machine operates?
I'm considering the following:
(hypervisor)
Xen
Hyper-V
(non-hypervisor)
VirtualBox
VMWare Server 2.0
Virtual PC 2007
*The classifications of the VMs I've listed may be incorrect.
The main difference is that Hyper-V doesn't run on top of the OS but instead along with the system it runs on top of a thin layer called hypervisor. Hypervisor is a computer hardware platform virtualization software that allows multiple operating systems to run on a host computer concurrently.
Many other virtualization solution uses other techniques like emulation. For more details see Wikipedia.
Disclaimer, everything below is (broadly) my opinion.
Its helpful to consider a virtual machine monitor (a hypervisor) as a very small microkernel. It has very few jobs beyond accessing the underlying hardware, such as monitoring of event channels and granting guest domains access to specific resources .. while enforcing some kind of scheduler.
All guest machines are completely oblivious of the others, the isolation is true. Guests do not share memory with the privileged guest (or each other). So, in this instance, you could (roughly) think of each guest (even the privileged one) as a process, as far as the VMM is concerned. Typically, the first guest gets extra privileges so that it can manage the rest. This is the ideal technology to use when virtual machines are put into production and exposed to the world.
Additionally, some guests can be patched to become aware of the hypervisor, significantly increasing their performance.
On the other hand we have things like VMWare and QEMU, which rely on the host kernel to give it access to bare metal and enough memory to exist. They assume that all guests need to be presented with a complete machine, the limits put on the process presenting these (more or less) become the limits of the virtual machine. I say more or less because device mapper QoS is not commonly implemented. This is the ideal solution for trying code in some other OS, or some other architecture. A lot of people will call QEMU, Simics or even sometimes VMWare (depending on the product) a 'simulator'.
For production roll outs I use Xen, for testing something I just cross compiled I use QEMU, Simics or VirtualBox.
If you are just testing / rolling new code on various operating systems and architectures, I highly recommend #2. If your need is introspection (i.e. watching guest memory change as bad programs run in a guest) ... I'd need more explanation before answering.
Benefits of Hypervisor:
Hypervisor separates virtual machines logically, assigning each its own slice of underlying computing power, memory, and storage, thus preventing the virtual machines from interfering with each other.