2018-10-08T17:34:00Z
Julia Frohwein - PeerSpot reviewer
Senior Director of Delivery at PeerSpot (formerly IT Central Station)
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What needs improvement with KVM?

Please share with the community what you think needs improvement with KVM.

What are its weaknesses? What would you like to see changed in a future version?

16
PeerSpot user
16 Answers
Georges ESSOMBA - PeerSpot reviewer
Business Engineer and Consultant at All-Tech
Real User
Top 10
2022-08-29T17:28:49Z
Aug 29, 2022

One problem I have is that it's not very scalable when it comes to resizing the VM disk dimensions. For example, if you have initially set a virtual drive to 10 GB and you want to upgrade it to 15 GB, it's not that easy. For this kind of task, you have to get behind the command-line to set it, and this process isn't easy for a newcomer. However, if you have planned your virtualization project well and you know exactly how much RAM and storage space you will need for each different VM, you can simply set it and forget it, because everything you set is permanent. Another improvement I would like to see is better functionality when it comes to making snapshots automatically while the VM is still running. For example, when a VM is running and you want to back it up, occasionally the VM backup that you obtain is not usable. Thus, I would propose that in the next edition of KVM there should be better "hot" backup features (as opposed to "cold" backups which are performed when the VM is powered down).

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MT
Solution Architect at Ericsson
Real User
Top 5
2021-10-08T15:24:19Z
Oct 8, 2021

In our setup, we do not have any dashboards or orchestration, and it is hard to manage. We have 25 gig network cards, but the software driver we have only supported 10 gigs.

SK
Co-Founder and CTO at a tech services company with 11-50 employees
Real User
Top 20
2021-08-19T09:44:02Z
Aug 19, 2021

Their support for snapshot and revert could be improved. I'd also like to see the product achieve high availability across clusters and to have more support for Apache CloudStack.

SC
Technical Solution Manager at OneAsia
Real User
2021-06-07T08:07:03Z
Jun 7, 2021

Monitoring and resolution are features which could be improved and I've found that if the product has not been used for some time, it needs to be re-set.

Mostafa Khadem - PeerSpot reviewer
Senior Linux System Administrator at Dana Energy
Real User
Top 5Leaderboard
2021-04-21T06:35:03Z
Apr 21, 2021

I think the UI could be developed more in the future because there are some issues with the graphics and some software that is very complex. A GUI for controlling the VMs would be a good additional feature. It's easy for us but it's difficult for others working with CLI.

ST
Founder at a retailer with 1-10 employees
Real User
Top 5
2021-04-17T14:16:55Z
Apr 17, 2021

Its resource usage can be improved.

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Buddy Parker - PeerSpot reviewer
Founder at Element Flux
Real User
Top 5
2020-12-23T05:16:55Z
Dec 23, 2020

From my skill set and what I'm capable of, I wouldn't know how to say what could be improved as it works exceptionally well. I know that things can always be improved. One thing that maybe could be improved is making it easier to scale. It needs to be more clear on how to scale the storage space for virtual machines. That's one thing that's a little bit confusing. That's more systems administration, in general. If they would make it a little easier to do, then you wouldn't have to have so much systems admin knowledge in order to use one feature. I tried to follow the information provided, however, then the partitions were added, the logical drive, and it didn't actually end up being initialized correctly. I'm pretty sure it's due to my own error, and not using it correctly. However, if they would have been clear on how to do it, or if they could even build a command that literally executes the necessary commands for you, just by typing, or using the virtual manager, that would have been helpful. I've only used the solution for a short period of time, so maybe it's there, however, I'd like it if maybe they could combine some network manager type item in there to be able to bridge connections a little easier. Then, you wouldn't have to do it as a separate task. Perhaps their existing network management already includes that. I'm not sure.

Ernesto HernáNdez - PeerSpot reviewer
Project Leader at Logicalis
MSP
2019-12-09T10:58:00Z
Dec 9, 2019

The initial setup of this solution is more difficult than some of the competing products and it could be improved. I would like to be able to see virtual networking integrated with the virtual machine.

Mahdi Bahmani - PeerSpot reviewer
Solution Architect, IT Consultant at Merdasco - Rayan Merdas Data Prosseccing
Real User
Top 5Leaderboard
2019-10-21T17:16:00Z
Oct 21, 2019

This solution is lacking in features such as management and integration. * This solution needs better integration with desktop virtualization. * Better integration with storage solutions is needed. * Business continuity features need to be added. * The live migration needs to be improved. * You cannot run this application in a data center using only the GUI, so you have to have some knowledge with Linux in order to best manage it. * Better network management software is needed. * Features like vSAN are not available on KVM. * Integration with Kubernetes would be an improvement. Generally, this solution should be made easier to use. Many customers don't have enough experience with Linux or a deep understanding of operating systems, and they just want to use the product. This together with a lack of features has led customers to choose VMware.

VascoCampos - PeerSpot reviewer
System Engineer at NoBoring Lda
Real User
2019-10-21T17:15:00Z
Oct 21, 2019

The virtual manager and the graphical QEMU for KVM need some improvement. In the next release, I would like to see some changes made to the dashboard as it would be nice to see some icons and some graphics when you are showing this solution to clients. MOP made some changes to the dashboard, but it made it more difficult and it's a bit complicated. Maybe this was done intentionally because this is an open-source solution with technical support as an additional fee.

Georges ESSOMBA - PeerSpot reviewer
Business Engineer and Consultant at All-Tech
Real User
Top 10
2019-10-13T05:49:00Z
Oct 13, 2019

The solution should be more user friendly despite that some interesting graphical solutions are available to manage the VMs. it would be usefull that the solution integrate the VM snapshot features and make it graphical, so we have a VM infrastructure more complete and easy the backup/restore in case of issue.

CM
Principal Engineer at a financial services firm with 1,001-5,000 employees
Real User
Top 20
2019-10-10T09:25:00Z
Oct 10, 2019

full interoprability with vm format (ova, ovf, ..) for been aable to move forward or backward to another virtualization solution

AR
IT-Leiter (IP) at IN-telegence GmbH
Real User
2019-04-10T11:51:00Z
Apr 10, 2019

Management of underlying volumes.

it_user781875 - PeerSpot reviewer
System Architect at a aerospace/defense firm with 10,001+ employees
Real User
2018-12-05T11:40:00Z
Dec 5, 2018

The management of the whole system, could be improved. VMware is better on the management tools, for example, Red Hat is when it comes to the KVM. In addition, we would like to have a software lifecycle solution included in this solution. We can handle the software needed for KVM, but also the software that we provide. A lifecycle component would be very beneficial.

AM
Software Architect at Acronis
Real User
2018-11-22T10:29:00Z
Nov 22, 2018

In the future release of KVM, I would like to have improved support for Windows guests.

it_user781875 - PeerSpot reviewer
System Architect at a aerospace/defense firm with 10,001+ employees
Real User
2018-10-08T17:34:00Z
Oct 8, 2018

I would like to see a separation, so you could have KVM running in a few cores, and then you could have a real-time operating system running another core, so there is a hybrid environment with real time operating systems and Linux.

Related Questions
Netanya Carmi - PeerSpot reviewer
Content Manager at PeerSpot (formerly IT Central Station)
Nov 30, 2021
Which is better and why?
2 out of 3 answers
Syed Abid Hussain - PeerSpot reviewer
Snr. Infrastructure Architect (Data Centre) at DHA
Nov 23, 2021
KVM is a kernel base hypervisor while Proxmox VE is open-source. Technically, Proxmox VE fulfills the smallest business users than KVM. And if we go for the quality and support KVM is better.  But Proxmox VE has also more features according to business growth.
WV
User at a marketing services firm with 201-500 employees
Nov 30, 2021
In a marketing services-related company security is paramount. Therefore, you probably will rely on services, especially during maintenance of your network and need support for that. When it comes to security and support KVM would be the better option. With in-house engineers, both Proxmox VE and KVM could be chosen. But qualified engineers are hard to come by nowadays, depending on where you live. As a side note, I maintain mainly Xenserver, VMware and KVM. When it comes to performance per watt Xenserver would be the king, especially on larger setups.  Since your setup is of medium size and if you decided not to go for the aforementioned setups, KVM would be the lesser of the worse. Your question depends a lot on the hardware/cloud system you have in mind. More details would make my recommendations more precise. Kind regards,
Netanya Carmi - PeerSpot reviewer
Content Manager at PeerSpot (formerly IT Central Station)
Nov 1, 2021
Which is better and why?
See 1 answer
Nov 1, 2021
KVM is easy to use, stable and flexible. It is mature and very fast. It is an affordable open-source solution that is easy to set up and manage. It offers very good security. It has a virtual manager which is command line based and they do also offer a graphical user interface. Scaling up with KVM can be challenging, though. It should be more clear how to scale the storage space for virtual machines. The solution also lacks high availability across clusters. They really should improve the user dashboard and interface. Technical support could be better, too. The good thing about Oracle VM VirtualBox is that this solution is multi-platform. You can create a virtual machine to run in one ecosystem, then switch over to run in other ecosystems. This works with Windows, Linux, or Mac, and can even run on some of the not-so-popular products such as Solaris and BSD as well. Oracle VM Virtual Box is open source, which makes it very flexible and versatile. This product is user-friendly and easy to use. The technical support is also very good. The user interface is a little outdated, though - and the artificial intelligence is not very attractive. This solution needs to have better ways of starting and stopping the machine. The memory and hardware usage can be a bit heavy and the CPU usage needs to be lower. This solution can also get quite expensive. Conclusion After looking at both these products, we chose KVM. It is very stable, mature, and easy to use. It came with the Linux operating system we were introducing to the client and we found it works best with that ecosystem. Our client has a small business that is not expected to have a huge growth trajectory over the next several years, so it is a very good fit for them.
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