Following are some comments we've received from OpenVZ users.
I'm curious. For the past few months, people@openvz.org have discovered (and fixed) an ongoing stream of obscure but serious and quite long-standing bugs.
How are you discovering these bugs?
Andrew Morton, Devel mainling list
OpenVZ, which also is vying for inclusion in the mainstream Linux kernel, would complement Xen well and has impressed me in the initial testing I've conducted.
Jason Brooks, Senior Analyst, Ziff Davis. eweek.com
I just wanted to congratulate you and the rest of the OpenVZ team for your excellent, excellent work. We are now have an OpenVZ subject in our 120 hours Total Linux course here at the Bluepoint Foundation, and our students really appreciate the work you've done. I'm learning a lot from lurking in the devel list too. Thanks again and keep 'em coming! :D
Engels Antonio, Bluepoint Foundation
I would say, OpenVZ is United States of Linux because i can run all my lovely different type of GNU/Linux distributions(States) on one single machine with one kernel model. As stable as guaranteed for production server and handy for software development (well no more dual, tri, quad boot partition). After all, it is just a good quality software piece for Linux User. Again, welcome to United States of Linux world!!
Victor, System Admin, kholix.com
Thanks for producing OpenVZ, we use it ourselves at PlanetMirror and find that it's fantastic.
Robert McLeay, PlanetMirror.com stuff
OpenVZ is about the greatest thing we've ever found, and we're SO glad for it.
Gregor Mosheh, HostGIS [1]
OpenVZ has me seriously impressed, I was looking to try virtualisation technology and got OpenVZ up and running in only 3 trips to the coffee machine! -barf
We've been running OpenVZ in a production environment for a few years for a multitude of tasks. It's been nothing short of amazing, stable, and resource friendly! Thanks to all those who have contributed to make OpenVZ even better over the years!
Eric Thern, Technical Director, Zoidial Hosting and VPS
Hello all, just downloaded and installed OpenVZ, and i must say its a big improvement over other container systems that i have tested IMHO. [2]
Virtuozzo and openvz are wonderful - I don't know why more people aren't using them. I hear a lot of hype for xen and usermode but virtuozzo/openvz is so great for many common needs. [3]
For my needs, OpenVZ is better than Xen. The one-kernel approach conserves memory, leaving more for applications. And having all container in one disk partition saves disk space. A surprise bonus was the template cache management with yum. The ease of keeping templates updated and quickly installing new operating environments is yummy! [4]
I agree with you very much. I would say for enterprise use where cost/efficiency is not a factor, Xen has an edge over VZ. However for a service provider or other situation where CPU/RAM/DISK resources are shared among environments to ensure profitability/efficiency, openvz is far superior. Also, VZ is much simpler to use, and all of the command line utilities are well documented. [5]
Last week when we were in limbo about what to do, it was decided to try out XEN Virtualization. From what is written in the press the Xen system has alot of promise, Features such as opensource with live migration and backups sounds great; but was far too complicated to get working in our configuration. OpenVZ was the only virtual server system that was simple to install and get working. [6]
It still amazes me how well OpenVZ works. [7]
[03:30:15] <pookey> well, I've been using openvz for all of about an hour, and I'm pretty impressed so far :)
from #openvz IRC channel
I am playing around for years with all major virtualization environments like all VMware products, Microsoft and several xen based solutions. But OpenVZ is the overall winner. [8]
I messed around with VMWare and Xen. I found VMWare to be somewhat over kill and Xen was damned hard to get working. The user community on the Xen mailing list is rather hostile. It looked like A number of people hang out there for the sole purpose of flaming the clueless.
I've found the OpenVZ folks to be very helpful and knowledgeable. OpenVZ is simple to install and get running. It pretty much satisfies my needs. [9]
I'm a sysadm and have always used xen/qemu/virtualbox/vmware server for my VMs and my customer's ones. Yesterday I decided to give OpenVZ a try and... I'm amazed. It's fast, easy and reliable.Live migration works like a charm and the use of rsync assures low data transfers. Great. [10] Stefano Marinelli, http://www.dragas.net
OpenVZ is one of the few pieces of software that I truly love. It works wonderfully. It should become part of the mainline kernel. Nick Andrew, http://www.nick-andrew.net
And thanks again for OpenVZ. Our business couldn't do what we do, as well as we do, with VMWare or Xen. Gregor Mosheh, System Administrator, HostGIS cartographic development & hosting services.
Thank you for OpenVZ by the way... it is awesome. It saves me hours of work every day. Eric Gearhart, http://nixwizard.net
For us at Signet, OpenVZ is ideal as a virtualization platform as it's open-source, no vendor lock-in's and great performance. It perfectly integrates into our high-availability SAN and server setup so it's great. Remco Bressers, http://www.signet.nl
Indira Gandhi National Open University, India (IGNOU) is the world's largest open university in terms of student enrolments (2.5 + million approx.) for different programmes. Catering web based services to such large student fraternity is indeed a hard task. The systems and services were heavily biased towards proprietary corporations products, thereby, aggravating the quality of service to its intended audience. Moreover, virtualization was a blackbox to the IT department of IGNOU, until May 2009. Thereafter the entire networks and systems were stunned to see at least 3 Mediawiki sites , 2 Subversion server for in-house development team, 1 egroupware server on a single SUN Fire X 4140 powered by OpenVZ. All the services are live with downtime of 5 hours(due to electrical outage, ISP downtime) since May 2009 till date. That makes 99.91 % uptime. Kudos to OpenVZ team for making this possible. --Sukant Kole 23:37, 13 January 2010 (UTC)