===== Who needs OpenVZ? How it can be usedSo what is Virtuozzo? =====:See [[Use cases]]Virtuozzo is a Linux based virtualization platform, combining container and hypervisor virtualization, into a single product. While primarily built for service providers to run cloud services and applications, it is used by variety of businesses, including MSP, SMB and Enterprises.

===== How What is OpenVZ different from other technologiesand how it compares to Virtuozzo? =====:See [[Introduction to virtualization]]OpenVZ is a free and opensource portion of Virtuozzo. It includes core of Virtuozzo functionality, like kernel and command line management tools for creating and managing containers. Virtuozzo includes everything that OpenVZ does, plus additional features and services available with the commercial version only.

===== How is does Virtuozzo 7/OpenVZ updated pair compares to its predecessor (Virtuozzo versions 4.x and why it is secure? 6/OpenVZ) =====:See [[Security]]Previously, OpenVZ and Virtuozzo were built out of the same code base with some unique patches applied. That warranted the user interfaces to be similar but not identical. With Virtuozzo 7, the compatibility will be on the binary level - effectively the open source components will be the same between OpenVZ and Virtuozzo.

===== I want to show my appreciation to How OpenVZ and put some logo to my site. Where to get users will benefit from it? =====:See [[Artwork]] == Installation and upgrade ==OpenVZ components will be undergoing the same testing procedures as the commercial product. Also, some new features previously available on Virtuozzo only (notably hypervisor) will become available on the product built for OpenVZ community users.

===== What hardware is supported by OpenVZ kernelsupport options are available for Virtuozzo 7? =====:See For the moment, only preview (beta) versions of Virtuozzo 7 are available. They are intended for development and testing only, not for production. Virtuozzo 7 is not yet commercially supported. For supported commercial version, please refer to [http://www.virtuozzoodin.com/en/products/virtuozzo/hcl/ Virtuozzo HCL6].

===== Why there are different kernel flavours available and what do they meanI need Virtuozzo/OpenVZ when LXC exist? =====:See our [[Different kernel flavors (UP, SMP, ENTERPRISE, ENTNOSPLIT)comparison]]of different virtualization solutions.

===== How do I rebuild the When OpenVZ will be in upstream kernel? =====Our kernel developers [http://openvz.org/File:See [[Kernel build]Kernel_patches_stats.png work hard]to merge containers functionality into the upstream Linux kernel, making OpenVZ team the biggest contributor to Linux Containers (LXC) kernel, with features such as PID and network namespaces, memory controller, checkpoint-restore and much more.

===== How can I check package signatureswant to show my appreciation to OpenVZ and put some logo to my site. Where to get it? =====:See [[Package signaturesArtwork]].

===== Is it possible to run x86 VPS on a x86_64 archWhat kind of documentation is available? =====:Sure :) We actually did some work on that to enable migration of x86 VE from x86 to x86_64 and back, and to enable using 32-bit iptables in 32bit VE on an x86_64 system.

===== Who needs OpenVZ? How do I set up VPN for a VEit can be used? =====:See [[VPN via the TUN/TAP deviceUse cases]].

===== What How scalable is veth and how do I use itOpenVZ? =====:See [[Virtual Ethernet device]]

==Installation and upgrade === What are those User Beancounters? =====See [[UBC]].

===== In what units are measured UBC parametersHow to install OpenVZ? =====See [[UBC parameter units]]

===== How do I set up a VE which is able to get X Mb There are two versions of RAM? ======See [[Setting UBC parameters]].OpenVZ available:

===== I can not start a program in VE* [[Roadmap|stable version]]: it reports out of memoryOpenVZ legacy (based on RHEL5 and RHEL6 kernels). What do I do? =====See * [[Roadmap|development version]]: [[Resource_shortageVirtuozzo]]Linux distribution based on RHEL7 kernel.

===== How can I reset <code>failcnt</code> in <code>/proc/user_beancounters</code>? =====See [[UBC failcnt resetQuick installation]].

== Troubleshooting ======= My What hardware is supported by OpenVZ kernel crashed. What should I do? =====:See [[When you have an oops]https://hardware.redhat.com/ RHEL Hardware Compatibility List].

===== I see a lot of processes in D state. What does that meanHow existing OpenVZ users can upgrade to the [[Virtuozzo|new version]]? =====:See While there is no in-place upgrade, we prepared [[Processes in D stateUpgrade_script_from_OpenVZ_to_Virtuozzo_7|upgrade script]]for OpenVZ users to move their containers to the new platform. The script allows to transfer containers from old to new OpenVZ version (or from OpenVZ to Virtuozzo).