{"id":3748,"date":"2016-12-28T08:38:33","date_gmt":"2016-12-28T08:38:33","guid":{"rendered":"https:\/\/www.milesweb.com\/blog\/?p=3748"},"modified":"2026-01-10T15:34:49","modified_gmt":"2026-01-10T10:04:49","slug":"difference-between-kvm-and-openvz-virtualization","status":"publish","type":"post","link":"https:\/\/www.milesweb.in\/blog\/hosting\/vps\/difference-between-kvm-and-openvz-virtualization\/","title":{"rendered":"Difference in between KVM and OpenVZ Virtualization"},"content":{"rendered":"\n<p>Today I want to talk about virtualization in a more theoretical sense in order that you understand what type of virtualization to choose depending upon your needs. <span style=\"font-weight: 400;\">There are two major virtualization technologies KVM and OpenVZ. And due to equal popularity of both, there is a continuous debate between KVM vs OpenVZ.<\/span><\/p>\n\n\n\n<p>Over the years, virtualization has evolved and adapted to the needs of users and\/or the market. This evolution has resulted in different types of virtualization that go well beyond <em>&#8220;classic&#8221;<\/em> tools such as VMware or VirtualBox, giving us a wide range of possibilities to choose from. Among these, KVM and OpenVZ stand out as the most efficient and innovative virtualization types, which is why the KVM OpenVZ difference is frequently discussed. These types of virtualization are called level virtualization operating system and virtualization Kernel level, although they are best known for tools that make use of such technologies:<strong> OpenVZ and KVM<\/strong> <em>(respectively)<\/em>.<\/p>\n\n\n\n<p>Both virtualizations are very useful, but they have a number of differences that, although at first glance they cannot seem very significant, in practice they can be decisive in opting for one choice or another. To understand the difference between KVM and OpenVZ, the best approach is to explore what each type of virtualization offers.<\/p>\n\n\n\n<div class=\"skrlto-container\" style= \"border-radius: 13px;\npadding: 25px;\nbackground: #EEF6FF;\">\n<h2 class=\"skrlto-header-title\">Table Of Content<\/h2>\n<div class=\"skrlto-links-wrapper\">\n<ul>\n<li class=\"skroll-button\" data-skrolllto=\"WPT1WPTheme\">What is Virtualization?<\/li>\n<li class=\"skroll-button\" data-skrolllto=\"WPT2WPTheme\">What is KVM?<\/li>\n<li class=\"skroll-button\" data-skrolllto=\"WPT3WPTheme\">What is OpenVZ?<\/li>\n<li class=\"skroll-button\" data-skrolllto=\"WPT4WPTheme\">Key Differences Between KVM vs OpenVZ<\/li>\n<li class=\"skroll-button\" data-skrolllto=\"WPT5WPTheme\">Which Virtualization You Should Choose?<\/li>\n<li class=\"skroll-button\" data-skrolllto=\"WPT6WPTheme\">FAQs<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"WPT1WPTheme\">What is Virtualization?<\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">Virtualization: Virtualization is the practice of creating virtual instances or representations of computer resources, such as servers, operating systems, storage devices, or networks. It allows multiple virtual environments to run on a single physical system, enabling better utilization of resources, improved scalability, and increased flexibility in managing and deploying applications. This concept is fundamental when comparing KVM vs OpenVZ virtualization.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"WPT2WPTheme\">What is KVM?<\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">KVM virtualization is an open-source solution for Linux. It is a virtualization infrastructure that turns the Linux kernel into a hypervisor, allowing it to host multiple virtual machines (VMs). KVM provides efficient and secure virtualization capabilities, enabling users to run a wide range of guest operating systems, including various Linux distributions, Windows, and more.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"WPT3WPTheme\">What is OpenVZ?<\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">OpenVZ virtualization is an open-source, container-based virtualization solution for Linux. It operates at the operating system level, providing lightweight and efficient virtualization by creating multiple isolated containers, also known as virtual private servers (VPS), on a single physical host.&nbsp;<\/span><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">But what are the differences in between KVM and OpenVZ Virtualization? Let\u2019s take a look!<\/h4>\n\n\n\n<p>First of all, the foremost basic difference between OpenVZ and KVM is that&nbsp;OpenVZ can solely host Linux operating systems, whereas KVM is a lot versatile and might host Linux, Windows, or can opt for custom OS.<\/p>\n\n\n\n<p>Advantages and disadvantages of OpenVZ are that&nbsp;it permits the complete sharing of resources. OpenVZ uses a shared kernel with a virtualization layer above the actual Linux Operating System. This shared kernel setup is part of OS level virtualization OpenVZ, making it efficient but less flexible. Once you&#8217;ve hit your allotted RAM provided to you by the host, the remaining RAM becomes free for other server users. This is often not a problem if you run small software or applications, however, you may find yourself in a trouble if you&#8217;re running something that is resource-intensive.<\/p>\n\n\n\n<p>With KVM, you can configure precise minimum and maximum limits for your resources, allowing efficient use. This is known as full virtualization KVM, offering performance gains and full isolation between users. This is often true, real hardware virtualization, which means higher performance from lower needs on the hypervisor. 100 percent of the RAM and disk resources are dedicated to at least one individual user. KVM comes with an isolated environment and provides users their own kernel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"WPT4WPTheme\">Key Differences Between KVM vs OpenVZ<\/h2>\n\n\n\n<p>The most noteworthy KVM vs OpenVZ difference is that OpenVZ can only host Linux OS, while KVM is more versatile and supports Windows and custom operating systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">&#8211; Hardware Requirements:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\"><strong>Virtualization:<\/strong> Virtualization typically requires specialized hardware support, to enable hardware-level virtualization capabilities. This can impose certain limitations on the choice of hardware and may require CPUs with specific features.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\"><strong>OpenVZ:<\/strong> OpenVZ does not require specialized hardware support for virtualization. It leverages the host system&#8217;s kernel to create containers, allowing it to run on a wider range of hardware configurations.<\/span><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">&#8211; OS Support:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\"><strong>Virtualization:<\/strong> Virtualization supports a wide range of operating systems, including various Linux distributions, Windows, macOS, and more. It provides the flexibility to run different OSs simultaneously on the same physical machine.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\"><strong>OpenVZ:<\/strong> OpenVZ is primarily designed for Linux environments and supports a limited number of Linux distributions as both the host and guest operating systems.<\/span><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">&#8211; Kernel Version:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\"><strong>Virtualization:<\/strong> Virtualization, such as KVM, typically requires a specific kernel module to be installed. This module is closely tied to the kernel version and needs to match the host system&#8217;s kernel.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\"><strong>OpenVZ:<\/strong> OpenVZ requires a specific patched kernel, known as the OpenVZ kernel, to enable container-based virtualization. This kernel version may differ from the standard kernel used in other Linux distributions.<\/span><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">&#8211; Memory Distribution:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\"><strong>Virtualization:<\/strong> In virtualization, memory is allocated to each virtual machine individually, allowing fine-grained control over resource allocation. Each virtual machine has a dedicated amount of memory assigned to it.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\"><strong>OpenVZ:<\/strong> OpenVZ uses a shared memory model, where the host system&#8217;s memory is divided among the containers. The memory allocation is dynamic and flexible, allowing containers to utilize unused memory resources on the host.<\/span><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">&#8211; Price:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\"><strong>Virtualization:<\/strong> Virtualization solutions often come with licensing costs, especially for commercial offerings. The price can vary depending on the specific virtualization platform and additional features required.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\"><strong>OpenVZ:<\/strong> OpenVZ is an open-source project, meaning it is generally free to use and does not incur licensing costs. However, there may be costs associated with support, maintenance, or additional services depending on the specific implementation or provider.<\/span><\/li>\n<\/ul>\n\n\n\n<p><strong>Know the risk of overselling:<\/strong> Overselling is something where a <a href=\"https:\/\/www.milesweb.in\">web hosting provider<\/a> over commits the server resources to specific users considering that not each of the account uses up all those resources at a time. Whereas everything is oversold, Stay away from shady hosting firms that often oversells OpenVZ systems and host you on a system that has several containers. KVM also can be oversold, but it is highly isolated. Since OpenVZ hosts are usually oversold, OpenVZ servers are usually cheaper than KVM servers.<\/p>\n\n\n\n<p>If you are looking for Speed, Scalability, and Affordable solution, OpenVZ is the platform that you should consider. KVM offers private virtualized hardware as well as a&nbsp;network card, disk and graphics adapter, and bonded resources for inflated reliableness and customizability. KVM packages are the best opt for serious resellers, game servers, small businesses, and medium-sized enterprises.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"WPT5WPTheme\">Which Virtualization You Should Choose?<\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">OpenVZ vs KVM. The main difference between OpenVZ and KVM is that OpenVZ can only host Linux-based operating systems, while KVM can host Linux, Windows, and custom operating systems. The complete sharing of resources that OpenVZ is depended on the user whether to take it or not.<\/span><\/p>\n\n\n\n<div class=\"vlt-box \">\n<div class=\"box-title\" style=\"background:#D5EAFF; color:#000\">Conclusion<\/div>\n<div class=\"box-content\" >\n<p>OpenVZ focuses on lightweight containerization, primarily for Linux environments, with broader hardware compatibility, shared memory distribution, a specific patched kernel, and open-source nature. The choice between these technologies depends on specific requirements, infrastructure preferences, and the desired balance between flexibility, performance, and cost.<\/p>\n<p>I hope that with this small article you have understood the most important concepts of virtualization and know the advantages and disadvantages offered by each type of virtualization.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"vlt-box \">\n<h2 class=\"box-title\" style=\"background:#D5EAFF; color:#000\" id=\"WPT6WPTheme\">FAQs<\/h2>\n<div class=\"box-content\" >\n<h3 class=\"box-title\" style=\"background:#D5EAFF; color:#000\">What is the core fundamental difference between KVM and OpenVZ?<\/h3>\n<p>The fundamental difference between KVM and OpenVZ is the way they approach virtualization. KVM employs full virtualization, where every virtual machine runs its kernel, OpenVZ, on the other hand, depends on container-based virtualization and shares the host OS kernel.<\/p>\n<h3 class=\"box-title\" style=\"background:#D5EAFF; color:#000\">Which virtualization technology offers better performance, KVM or OpenVZ?<\/h3>\n<p>In most performance-driven environments, KVM virtualization is preferred because it offers dedicated resources and hardware-level isolation. OpenVZ may perform faster for lightweight tasks but lacks the same level of freedom.<\/p>\n<h3 class=\"box-title\" style=\"background:#D5EAFF; color:#000\">Which provides better isolation between virtual servers, KVM or OpenVZ?<\/h3>\n<p>In the case of isolation, full virtualization KVM provides improved isolation by offering each VM its hardware environment. Conversely, OpenVZ provides a shared kernel, which reduces isolation and is comparatively less protected for mission-critical workloads.<\/p>\n<h3 class=\"box-title\" style=\"background:#D5EAFF; color:#000\">When is OpenVZ a more suitable choice for my virtualization needs?<\/h3>\n<p>OS-level virtualization OpenVZ is better suited when you require deploying multiple light Linux containers in an efficient manner. It is suitable for hosting environments where cost savings, high container density, and sharing of resources are higher priorities compared to kernel-level isolation.<\/p>\n<\/div><\/div>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [{\n    \"@type\": \"Question\",\n    \"name\": \"What is the core fundamental difference between KVM and OpenVZ?\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"The fundamental difference between KVM and OpenVZ is the way they approach virtualization. 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And due to equal popularity of both, there is a continuous debate between KVM vs OpenVZ. Over the years,&#8230; <a class=\"read-more\" href=\"https:\/\/www.milesweb.in\/blog\/hosting\/vps\/difference-between-kvm-and-openvz-virtualization\/\">Read More<\/a><\/p>\n","protected":false},"author":1027,"featured_media":3750,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[365],"tags":[],"class_list":["post-3748","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vps"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>KVM vs OpenVZ Virtualization: Essential Comparison &amp; Expert Guide<\/title>\n<meta name=\"description\" content=\"Explore key differences between KVM and OpenVZ: OS support, resource allocation, performance, and when to use each for VPS hosting needs.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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