{"id":56645,"date":"2026-06-03T12:23:58","date_gmt":"2026-06-03T12:23:58","guid":{"rendered":"https:\/\/www.open-e.com\/blog\/?p=56645"},"modified":"2026-06-03T12:31:57","modified_gmt":"2026-06-03T12:31:57","slug":"why-san-data-storage-is-a-great-choice-for-virtualization","status":"publish","type":"post","link":"https:\/\/www.open-e.com\/blog\/why-san-data-storage-is-a-great-choice-for-virtualization\/","title":{"rendered":"Why SAN Data Storage is a Great Choice for Virtualization"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li><strong>NAS in Virtualization:<\/strong> While NAS offers file-level simplicity for basic workloads, its translation layers introduce I\/O latency<\/li>\n\n\n\n<li><strong>Direct Hypervisor Communication:<\/strong> SAN eliminates the friction by allowing the hypervisor to communicate directly with data storage blocks, ensuring the ultra-low, predictable performance required by production databases.<\/li>\n\n\n\n<li><strong>Enterprise Scale &amp; Zero Downtime:<\/strong> SAN is the premium standard for high-density, mission-critical environments, providing hardware-level locking and robust path redundancy to prevent revenue-losing downtime.<\/li>\n\n\n\n<li><strong>Optimized Open-E JovianDSS Synergy:<\/strong> Deploying a SAN via Open-E JovianDSS pairs hardware autonomy and ZFS self-healing with the precise, low-latency foundation hypervisors were natively designed to use.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Let\u2019s be honest, true IT experts don&#8217;t build systems to meet minimum requirements &#8211; we build them to withstand the worst-case scenario while delivering peak performance. When it comes to the data storage backend for your virtualized environment, <strong>SAN solutions offer major advantages that we should look into more deeply.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Virtualization with NAS<\/h2>\n\n\n\n<p>To be clear, file-level data storage is by no means an incorrect choice for hypervisor environments. In fact, many administrators successfully run production workloads over a Network Attached Storage (NAS) framework using Open-E JovianDSS as their data storage software. Presenting storage resources via enterprise protocols like NFS or SMB offers distinct operational advantages, primarily centered around administrative simplicity. Because Open-E JovianDSS delivers this NAS file-level access on a rock-solid Linux and ZFS foundation, these environments still benefit from enterprise-grade data integrity, high availability, and storage efficiency features. A prime practical demonstration of this capability is the <a href=\"https:\/\/www.open-e.com\/solutions\/open-e-technical-solutions\/data-storage-for-virtualization\/articles\/open-e-joviandss-integration-proxmox-ve-efficient-virtualization-open-source-solution\/\"><strong>Open-E JovianDSS Integration with Proxmox VE via NFS<\/strong><\/a>, which delivers relatively high performance without block-level complexity. Ultimately, a properly deployed Open-E JovianDSS NAS configuration stands as a highly reliable and cost-effective architecture for production nodes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Problem with &#8220;Translation Layers&#8221;<\/h2>\n\n\n\n<p>Virtualization is inherently demanding. A hypervisor creates its own complex file system to manage virtual machine disks. While NAS configuration is still a valid choice for virtualization, it is limited in comparison to SAN systems based on our software.<\/p>\n\n\n\n<p>Every I\/O request must be translated through multiple layers of metadata management. SAN removes this friction. By presenting data storage as raw blocks via <strong>Open-E JovianDSS<\/strong>, you allow the hypervisor to communicate directly with the system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">NAS &amp; SAN Comparison<\/h2>\n\n\n\n<p>While NAS is still a valid choice for virtualization, it still struggles to match the <strong>fundamental advantages granted by SAN:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Feature \/ Aspect<\/strong><\/td><td><strong>NAS (File-Level Storage)<\/strong><\/td><td><strong>SAN (Block-Level Storage)<\/strong><\/td><\/tr><tr><td><strong>Protocol<\/strong><\/td><td>NFS, SMB\/CIFS<\/td><td>iSCSI, Fibre Channel<\/td><\/tr><tr><td><strong>Data Access Layer<\/strong><\/td><td>File-system abstraction layer handled by the storage array.<\/td><td>Direct block access; hypervisor manages its own cluster file system (e.g., VMFS, CSV).<\/td><\/tr><tr><td><strong>I\/O Latency Profile<\/strong><\/td><td>Variable; higher overhead due to network file system stack encapsulation.<\/td><td>Deterministic and ultra-low; optimized for high-frequency random I\/O.<\/td><\/tr><tr><td><strong>Ideal Deployment Scenario<\/strong><\/td><td>Mainstream production nodes, rapid provisioning, and environments prioritizing simple file visibility.<\/td><td>High-density multi-tenant consolidation, mission-critical databases, and zero-downtime environments.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>The Critical Edge: Why SAN Remains the Perfect Choice for Virtualization<\/strong><\/h3>\n\n\n\n<p>While a NAS approach offers excellent operational simplicity, a SAN architecture remains the premium standard for high-density, enterprise-scale virtualization. As highlighted in our architectural table, the core advantage of a SAN lies in its raw, block-level precision. By allowing the hypervisor to communicate directly with the storage blocks via <strong><a href=\"https:\/\/www.open-e.com\/products\/open-e-joviandss\/\" title=\"\">Open-E JovianDSS<\/a><\/strong>, you eliminate the extra file-system translation layers that can introduce latency under heavy, mixed-I\/O workloads like production databases.\u00a0<\/p>\n\n\n\n<p>Furthermore, SAN architecture is fundamentally designed for multi-host cluster coordination, utilizing hardware-level locking mechanisms that ensure seamless virtual machine migrations and deep integration with hypervisor offloading features. When your infrastructure demands absolute performance predictability and the most robust path redundancy available, building your virtualized backend on a SAN architecture remains the definitive choice.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Achieve the Best Virtualization Performance Via Block-Level Control<\/h2>\n\n\n\n<p>Summing the topic up, NAS remains a valid choice for virtualization, but SAN has a unique performance advantage. If the speed of your system is the main priority, then SAN is a wise way to go!<\/p>\n\n\n\n<p><strong>Let\u2019s sum up the main differences, pros, and cons:<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Virtualization with NAS (File-Level)<\/strong><\/h3>\n\n\n\n<p>The hypervisor connects to storage as a shared network folder (via NFS\/SMB).<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PROS:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Simple Management:<\/strong> Easy to set up, mount, and manage with direct file visibility.<\/li>\n\n\n\n<li><strong>Cost-Effective:<\/strong> Uses standard, affordable network infrastructure.<\/li>\n\n\n\n<li><strong>Mainstream Ready:<\/strong> Perfect for standard workloads, routine applications, and simple provisioning.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>CONS:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Storage Friction:<\/strong> The hypervisor must translate I\/O requests through multiple file-system and network layers.<\/li>\n\n\n\n<li><strong>Higher Latency:<\/strong> Multi-layer access to metadata causes variable and elevated latency under stress.<\/li>\n\n\n\n<li><strong>Performance Cap:<\/strong> Struggles to meet the demands of high-density or mission-critical workloads.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Virtualization with SAN (Block-Level)<\/strong><\/h3>\n\n\n\n<p>The hypervisor treats remote storage as raw, local hard drives (via iSCSI\/Fibre Channel).<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PROS:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Direct Communication:<\/strong> Bypasses translation layers, connecting the hypervisor directly to raw storage blocks.<\/li>\n\n\n\n<li><strong>Ultra-Low Latency:<\/strong> Delivers predictable, deterministic speed optimized for rapid random I\/O.<\/li>\n\n\n\n<li><strong>Enterprise Power:<\/strong> Effortlessly handles heavy, mixed-I\/O production workloads like large databases.<\/li>\n\n\n\n<li><strong>Seamless Clustering:<\/strong> Hardware-level locking enables smooth, zero-downtime VM live migrations.<\/li>\n\n\n\n<li><strong>Max Redundancy:<\/strong> Built-in multi-pathing eliminates single points of failure for continuous uptime.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>CONS:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>High Complexity:<\/strong> Requires specialized expertise to configure and maintain block-level mapping.<\/li>\n\n\n\n<li><strong>Expensive Setup:<\/strong> Carries a high upfront cost for dedicated storage networking and hardware.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p>Feel free to <strong><a href=\"https:\/\/www.open-e.com\/products\/open-e-joviandss\/free-trial\/\" title=\"\">download a 60-day free trial of Open-E JovianDSS<\/a><\/strong> and test it to see how it can power up your virtualized environments with the SAN setup.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Let\u2019s be honest, true IT experts don&#8217;t build systems to meet minimum requirements &#8211; we build them to withstand the worst-case scenario while delivering peak performance. When it comes to&nbsp;&#8230;<\/p>\n","protected":false},"author":16,"featured_media":56646,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27,10],"tags":[],"class_list":["post-56645","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-open-e-joviandss","category-virtualization"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/posts\/56645","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/comments?post=56645"}],"version-history":[{"count":2,"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/posts\/56645\/revisions"}],"predecessor-version":[{"id":56649,"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/posts\/56645\/revisions\/56649"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/media\/56646"}],"wp:attachment":[{"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/media?parent=56645"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/categories?post=56645"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.open-e.com\/blog\/wp-json\/wp\/v2\/tags?post=56645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}