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KVM

4.3
(18)

KVM (for Kernel-based Virtual Machine) is an open-source virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V).

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Showing 18 KVM reviews
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KVM review by Derek D.
Derek D.
Validated Reviewer
Review Source

"My KVM review!"

What do you like best?

KVM has been for our company one of the best virtualization because It supports x86 infrastructure. It's open source and you can download it for free and use for development on your virtual machine. I would say it's easy to use when you know the commands and everything.

What do you dislike?

What I dislike about KVM is the fact you have to know how to install it and it's not easy to install for everyone. Depending on the machines there may be incompatibility issues. The support takes more time to get a reply because it's a free product.

Recommendations to others considering the product

I would recommend to everyone If you want an open source and free replacement for servers then you can give it a try. Configuration is really easy and doesn't takes a lot of time. This is a good solution If you want to install Windows on it. Don't forget this is an open source product so you can really trust this product for your company.

What business problems are you solving with the product? What benefits have you realized?

We saved money with KVM because we needed servers with linux kernels and we just used KVM as virtualization. We installed many linux versions for the costumers and they were really greatful.

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KVM review by Evan L.
Evan L.
Validated Reviewer
Review Source

"KVM is flexible, available at no cost, but not necessarily for the faint of heart..."

What do you like best?

I like that there's no licensing cost. I like the flexibility on tap. Overall with some technical familiarity you can deploy in [relative] confidence.

What do you dislike?

I dislike the steep learning curve, the lack of commercial support, and the finicky nature of the older, less mature versions. Centralized management is not really fleshed out, even though things like WebVirtMgr can be configured. Maintenance can be tricky. Migration from one host to another isn't very straightforward either.

Recommendations to others considering the product

I just read that Amazon is moving AWS away from Xen and towards KVM. That's huge news. I would imagine that it will only become better, more stable, and more fully featured with that kind of user base behind it, on top of the current base!

What business problems are you solving with the product? What benefits have you realized?

In areas where there's no virtualization budget but you need VMs, and can't or won't use VirtualBox or Xen, KVM is an option...

What Server Virtualization solution do you use?

Thanks for letting us know!
KVM review by Blagovest P.
Blagovest P.
Validated Reviewer
Verified Current User
Review Source

"My experience with KVM"

What do you like best?

Combined with LibVirt, KVM is one of the easiest and free hypervisors. Windows, Linux or UNIX operating systems runs without any problem. Windows drivers are provided compiled online from RedHat.

What do you dislike?

It's hard for setup if it's used without Libvirt or a similar tool.

Recommendations to others considering the product

Use it with LibVirt or integrated system like ProxMox. ZFS for the file storage is a big advantage! Also, it can be used with storage clusters lice Ceph for a bigger environments. OpenStack, the industry standart for compute clouds is mostly compatible with KVM.

What business problems are you solving with the product? What benefits have you realized?

Our infrastructure is based on KVM and Linux Containers. We had a lot of VMWare legacy but it was converted to Ubuntu and KVM hypervisor for about a year. Management and backup is a lot easier with with Ubuntu and KVM. Especially combined with ZFS and snapshotting.

KVM review by Phil w.
Phil w.
Validated Reviewer
Verified Current User
Review Source

"KVM the FLOSS virtualisation solution"

What do you like best?

Kvm is supporting Intel's VMX hardware virtualization which is optimal on intel powered system, I assume it's the same with other ventors isnt AMD providing vt instuctions set too ?

What do you dislike?

It can be confusing to have several incompatible virtualisations system on the same host , which is not possible but afaik there is no abstraction service to switch from one system to an other.

Setting up network interfaces can be confusion, and supporting accelerated GPU is not fully supported, so it can be inappropriate to test opengl application, that said vmware with mesa gallium driver can be an alternative to consider.

Recommendations to others considering the product

you can also look for libvirt and virtman which is providing a nice user interface if you're not confortable with command lines or man pages. Something also useful is to disable the GUI windows and use ncurses mode to use the guest machine on host's terminal. Last but not least even if kvm is a good product maybe there are other way to address isolations needs, for instance containers can also be considered, check also for CGroups, LXC, docker, rocket ...

What business problems are you solving with the product? What benefits have you realized?

I used kvm to test some distros like Tizen:Common which are using the same architectures.

KVM review by chedi t.
chedi t.
Validated Reviewer
Verified Current User
Review Source

"kvm review"

What do you like best?

In the Linux world KVM is a very reliable solution that can be used for x86 architecture virtualization with a reasonable overhead. Reliable and extensible, with a tight integration with linux security facilities like SELinux, KVM just does the job.

You will unlikely have to see kvm if you are using a cloud solution because of the seamless integration. If instead you are a Linux desktop user, KVM is the solution to go if you have to start virtual machines with linux or other operating systems with almost zero extra configuration needed.

That said, KVM have a rich options set that can be directly used or via wrappers like LibVirt.

What do you dislike?

The support of virtualization in the recent generation of x86 processor is almost a must have, so the only negative aspect of needing hardware support to have a fully functional kvm can be dropped. It would be nice if the support for other platform like ARM or Risk was as good as the x86 one, but I think with the democratization of chromebooks based on these chips and mobile devices, it will not take long for that to happen.

What business problems are you solving with the product? What benefits have you realized?

Full system virtualization is a necessity for some testing cases or in the event of evaluation of new functionnalities. Booting up a vm in a few seconds and having an almost genuine systems that can be can linked in very different network typologies for almost zero configuration were the main reasons of our choice of kvm.

KVM review by User in Telecommunications
User in Telecommunications
Validated Reviewer
Review Source

"KVM - Kernel based Virtual Manager"

What do you like best?

It integrates into the Linux kernel and hence it is easy to launch - like does not need to be installed like other hypervisors E.g oracle virtualbox or vmware player. It exists in the kernel as a module and hence it is loaded when the kernel starts and keeps running

What do you dislike?

the process of setting up virtual machines is not very easy and needs more knowledge and practice unlike using other user friendly hypervisors like Oracle virtualbox where everything is GUI based and can be done with the click of mouse.

Recommendations to others considering the product

KVM is the default hypervisor for Linux based hosts though other tools like virtualbox can be used.

What business problems are you solving with the product? What benefits have you realized?

I used KVM as part of HP blade servers to spin up new virtual machines for various VNFs. Though there was an initial learning, but once learned it was easy to manage the VNFs - their lifecycle (instantiation, upgrade, downgrade, etc)

KVM review by George G.
George G.
Validated Reviewer
Review Source

"Maybe the best free Virtualization System"

What do you like best?

The first fact that I like a lot about KVM is that it is a free and open source software, and it does not lack any of the features that other propertiary competitors provide .

Additionally it's easy to grasp and configure .

Finally , it's performance and reliability are very good ( comparable or even better that any of the alternatives ) .

What do you dislike?

One downside that I can think of is that it lacks availability for other processor architectures ( with ARM and RISK being the most important ) . This feature might also be very useful in the embedded system community .

Other than that I am very satisfied with this product .

Recommendations to others considering the product

If you need a full virtualization solution go with it ! It surpasses all the alternatives that I am aware of .

It wil not take long to learn how the configuration works so you will get the benefits pretty fast .

What business problems are you solving with the product? What benefits have you realized?

Using KVM for running different virtual machines that provide different services in the Intranet without the need of many different physical servers .

Also using KVM for deploying virtual machines for testing new features .

KVM review by User
User
Validated Reviewer
Review Source

"Good Virtual Software"

What do you like best?

It controls multiple Windows PCs from one console which is actually very cool and easy and flexible. It automatically shifts mouse and keyboard control to multiple PCs via a display matrix which is the best part of the tool that I like.

What do you dislike?

They can provide more support by helping online with the tool. Also, another barrier that I see with the tool is that its Windows only compatible.

Recommendations to others considering the product

For anyone interested to reduce cable cost for connecting and controlling multiple PCs, this tool is very useful in order to control multiple PCs.

What business problems are you solving with the product? What benefits have you realized?

Could control multiple PCs with one console. Like the KVM (Keyboard. Video, and Mouse) software is very useful is controlling multiple PCs, one such is Multiplicity 3.

KVM review by George S.
George S.
Validated Reviewer
Review Source

"KVM handles everything we need"

What do you like best?

We run multiple versions of Linux servers for several clients on a few machines.

What do you dislike?

Nothing I have found to dislike yet after 2+ years.

Recommendations to others considering the product

We run from one to four virtual Linux servers on one hypervisor. I understand KVM can run Windows virtual machines, but we have no need for that.

What business problems are you solving with the product? What benefits have you realized?

We do server hosting for several clients who have a need for different versions of LInux - from RedHat 9.0 to CentOS 7.3. KVM handles all of the quite well.

KVM review by Administrator in Food Production
Administrator in Food Production
Validated Reviewer
Verified Current User
Review Source

"Virtualization of a testing environment for IPv6 network testing"

What do you like best?

I like the fact that KVM is Open Source software and thus compatible with a lot of applications that can be easily run in a Linux server with a very low cost.

I also find KVM lighter than other solutions in terms of hardware requirements.

What do you dislike?

KVM is not available for all the processors. Also the process of setting up a network is not as easy as with other solutions.

I did run into some implementation bugs but they were fixed in newer versions.

What business problems are you solving with the product? What benefits have you realized?

I used KVM to test IPv6 integration in a testing network environment. The aim was to learn the differences from a sysadmin point of view of administrating an IPv6 network to IPv4 networks.

KVM review by James D.
James D.
Validated Reviewer
Review Source

"Open source Kernel Level Visualization. "

What do you like best?

Free.

Easy to use and quick to configure.

Does everything most companies will need in terms of Visualization.

What do you dislike?

Lack of "Over selling" - Unlike container based visualization RAM can not be oversold.

Has a small overhead, uses much more resources than container based visualization.

Although these are downsides of Full Visualization and not KVM its self.

Recommendations to others considering the product

Fantastic product. As good as the costly alternatives.

What business problems are you solving with the product? What benefits have you realized?

We currently run 5 KVM VM's avoiding the need for 5 physical servers.

We also use KVM to separate our web server from development platforms.

In the past I managed a VPS server that had over 200 KVM VM's on it. The only issue we had was when we accidentally over allocated resources.

KVM review by Antonio I.
Antonio I.
Validated Reviewer
Review Source

"great tool for virtualization KVM"

What do you like best?

Excellent Linux kernel virtualization infrastructure excellent. KVM supports full virtualization using Intel VT or AMD-V. KVM is implemented as a loadable kernel module, although in future versions a system call interface can be used and will be integrated directly into the kernel.

What do you dislike?

Limited support for paravirtualization is also available for Linux and Windows guests in the form of a paravirtual network driver

What business problems are you solving with the product? What benefits have you realized?

Speed in virtualizing Host

KVM review by Administrator
Administrator
Validated Reviewer
Verified Current User
Review Source

"Not as good as OpenVZ"

What do you like best?

Isolated containers, gives dedicated reources

What do you dislike?

Hard to work with, no access from root level, memory and CPU very stringent.

Recommendations to others considering the product

Would be careful if using for WP/CMS sites.

What business problems are you solving with the product? What benefits have you realized?

VPS containers.

KVM review by User in Hospital & Health Care
User in Hospital & Health Care
Validated Reviewer
Review Source

"My feedback "

What do you like best?

It helps with virtualization of our bare metal servers , very effective tool for any technology in business perimeter or restricted , can be placed in any network zone

What do you dislike?

performance can be an issue sometimes , too many version upgrades

What business problems are you solving with the product? What benefits have you realized?

we are currently in the process of virtualizing a lot of our physical servers and KVM can come in very handy

KVM review by User in Insurance
User in Insurance
Validated Reviewer
Review Source

"Great but lags"

What do you like best?

How fast it connects, plug in and it will pop out immediately!

What do you dislike?

How it lags, some color pixels will turn and slows down the program

What business problems are you solving with the product? What benefits have you realized?

Connecting with servers such like HP and ZT models. No benefits!

KVM review by User in Hospital & Health Care
User in Hospital & Health Care
Validated Reviewer
Review Source

"Top virtualization software"

What do you like best?

Great addition to the software suite as it allows full virtualization

What do you dislike?

It runs slow on old computers so that can be a challenge

What business problems are you solving with the product? What benefits have you realized?

The use of different operative systems with same hardware

KVM review by Administrator in Defense & Space
Administrator in Defense & Space
Validated Reviewer
Review Source

"KVM review"

What do you like best?

Ease of use. Command line interface has good online tutorials and support.

What do you dislike?

Troubleshooting can be tricky as logs are not very descriptive

What business problems are you solving with the product? What benefits have you realized?

Virtulzation ease of access for development and automation.

KVM review by Administrator in Telecommunications
Administrator in Telecommunications
Validated Reviewer
Review Source

"Must have for your cloud"

What do you like best?

OpenSource standards based hypervisor. Works with various cloud platforms

What do you dislike?

CLI is often confusing and difficult to use

What business problems are you solving with the product? What benefits have you realized?

Private cloud. Many linux distributions support it.

Kate from G2 Crowd

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