---
title: "Edge High Availability Without a Data Center: SafeKit for OT & Distributed Sites"
description: "Edge High Availability Without a Data Center: SafeKit for OT & Distributed Sites The Edge HA Challenge Edge sites often have no data center and no HA expertise — yet business continuity is critical. A factory floor, an offshore oil platform, a hospital clinic, a retail store, or a 5G antenna site cannot afford downtime, […]"
canonical: "https://safekit.eviden.com/use-cases/edge-high-availability-without-a-data-center-safekit-for-ot-distributed-sites/"
topics: "The Edge HA Challenge, What Makes SafeKit the Natural Fit for Edge, Edge & Distributed Deployment Suitability, Why Edge OT Environments Are Different, Ideal Edge Use Cases, Edge vs. Data Center HA: Key Differences, Technical Minimum Requirements, 🔍 SafeKit High Availability Navigation Hub"
category: "use-cases"
lang: "en"
---

<h1 id="edge-high-availability-without-a-data-center-safekit-for-ot--distributed-sites">Edge High Availability Without a Data Center: SafeKit for OT &amp; Distributed Sites</h1>
<h2 id="the-edge-ha-challenge">The Edge HA Challenge</h2>
<p>Edge sites often have no data center and no HA expertise — yet business continuity is critical. A factory floor, an offshore oil platform, a hospital clinic, a retail store, or a 5G antenna site cannot afford downtime, but cannot justify the cost and complexity of a traditional data center HA cluster.</p>
<p>Traditional HA solutions — Microsoft Failover Cluster (WSFC), Pacemaker/Corosync, VMware HA — were designed for data centers: they assume shared storage (SAN/NAS), dedicated cluster hardware, permanent IT staff, and complex OS-level expertise. None of these exist at the edge.</p>
<p>SafeKit was built for exactly this gap. It keeps edge applications running in factories, oil platforms, ships, building security, air traffic control, 5G networks, healthcare, retail, and more — with nothing more than two standard servers and a LAN.</p>
<img src="/wp-content/uploads/2026/05/safekit-edge-512-512.jpg" alt="SafeKit for Edge">
<h2 id="what-makes-safekit-the-natural-fit-for-edge">What Makes SafeKit the Natural Fit for Edge</h2>
<p>SafeKit turns two standard edge servers (any brand, physical or virtual) into a plug-and-play HA cluster — no shared storage, no SAN, no special hardware. One lightweight software stack delivers:</p>
<ul>
<li><strong>Real-time synchronous file replication</strong> — data is mirrored byte-level to the standby server at write time</li>
<li><strong>Automatic failover</strong> — if the primary server fails, the standby takes over without human intervention, within seconds</li>
<li><strong>Optional network load balancing</strong> — for active-active deployments where both servers share the workload</li>
<li><strong>Web console</strong> — browser-based management, remotely accessible over HTTPS, requiring no on-site expertise</li>
<li><strong>Silent, scriptable install</strong> — suitable for OEM embedding and mass deployment across hundreds of distributed sites</li>
</ul>
<p>There is no SAN to procure, no Windows Server Datacenter license required, no Linux cluster OS expertise needed, and no dedicated cluster hardware. The entire HA stack is a single software package.</p>
<h2 id="edge--distributed-deployment-suitability">Edge &amp; Distributed Deployment Suitability</h2>
<p>SafeKit is specifically designed for edge, branch office, and distributed enterprise scenarios:</p>
<table>
<thead>
<tr>
<th>Edge Requirement</th>
<th>SafeKit Answer</th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>No dedicated IT staff on-site</strong></td>
<td>Automatic failover, no manual intervention required</td>
</tr>
<tr>
<td><strong>No SAN/NAS infrastructure</strong></td>
<td>SANless architecture, local disks only</td>
</tr>
<tr>
<td><strong>Remote management</strong></td>
<td>Web console accessible over HTTPS from any browser</td>
</tr>
<tr>
<td><strong>Low hardware footprint</strong></td>
<td>2 standard servers or VMs, no special hardware</td>
</tr>
<tr>
<td><strong>Works behind firewalls/NAT</strong></td>
<td>Configurable ports, HTTPS-based console</td>
</tr>
<tr>
<td><strong>Multi-site disaster recovery</strong></td>
<td>Mirror between two geographic sites over stretched VLAN</td>
</tr>
<tr>
<td><strong>Air-gapped / offline networks</strong></td>
<td>No internet dependency; fully self-contained</td>
</tr>
<tr>
<td><strong>OEM/embedded deployment</strong></td>
<td>Silent install, scriptable, embeddable by software publishers</td>
</tr>
<tr>
<td><strong>Hundreds of distributed clusters</strong></td>
<td>Designed for distributed enterprises managing many branches</td>
</tr>
</tbody>
</table>
<h2 id="why-edge-ot-environments-are-different">Why Edge OT Environments Are Different</h2>
<p>OT (Operational Technology) environments — SCADA, BMS, physical security, industrial control — have requirements that differ fundamentally from IT data centers:</p>
<ul>
<li><strong>No IT staff on-site.</strong> A substation, a remote pump station, or a ship has no sysadmin. HA must be self-managing.</li>
<li><strong>Air-gapped or constrained networks.</strong> Many OT sites have no internet access and limited WAN bandwidth. HA software must work fully offline.</li>
<li><strong>24/7 uptime, zero tolerance for complexity.</strong> Stopping a production line, losing video surveillance, or interrupting access control costs far more than the HA software itself.</li>
<li><strong>Long equipment lifecycles.</strong> OT servers may run 10–15 years. The HA solution must be stable, low-maintenance, and not require constant updates.</li>
<li><strong>Standard x86 hardware only.</strong> No budget or justification for SAN or dedicated cluster nodes at a remote industrial site.</li>
<li><strong>Intolerance for OS-level complexity.</strong> Pacemaker, Corosync, or WSFC require cluster expertise that OT operators simply do not have and should not need.</li>
</ul>
<p>SafeKit&rsquo;s SANless, two-server, automatic-failover model addresses every one of these constraints directly.</p>
<h2 id="ideal-edge-use-cases">Ideal Edge Use Cases</h2>
<p>Any site without a data center — where high availability still matters:</p>
<table>
<thead>
<tr>
<th>Vertical</th>
<th>Typical Edge Site</th>
<th>Critical Application</th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>Physical security &amp; surveillance</strong></td>
<td>Buildings, campuses, airports</td>
<td>VMS — Milestone, Genetec, Hanwha, Siemens Siveillance</td>
</tr>
<tr>
<td><strong>Building management (BMS)</strong></td>
<td>Office buildings, hospitals, factories</td>
<td>Siemens Desigo CC, Bosch BIS/BVMS</td>
</tr>
<tr>
<td><strong>Electronic access control (EACS)</strong></td>
<td>Secure facilities, campuses</td>
<td>Siemens SiPass, Nedap, Bosch AMS</td>
</tr>
<tr>
<td><strong>SCADA &amp; industrial control</strong></td>
<td>Factories, substations, water plants</td>
<td>Any SCADA, DCS, or HMI software on Windows or Linux</td>
</tr>
<tr>
<td><strong>Air traffic control (ATC)</strong></td>
<td>Airports, control towers</td>
<td>ATC management and radar systems</td>
</tr>
<tr>
<td><strong>Operations control centers (OCC)</strong></td>
<td>Metro, railway, transit hubs</td>
<td>Railway signaling and station management</td>
</tr>
<tr>
<td><strong>Maritime</strong></td>
<td>Ships, naval vessels</td>
<td>Navigation, cargo and onboard management systems</td>
</tr>
<tr>
<td><strong>Oil &amp; gas</strong></td>
<td>Offshore platforms, remote rigs</td>
<td>Process control and safety systems</td>
</tr>
<tr>
<td><strong>Telecommunications</strong></td>
<td>5G antenna sites, MEC nodes</td>
<td>Multi-access edge computing (MEC) servers</td>
</tr>
<tr>
<td><strong>Healthcare</strong></td>
<td>Clinics, remote diagnostic centers</td>
<td>Medical imaging, patient data, remote diagnostics</td>
</tr>
<tr>
<td><strong>Retail</strong></td>
<td>Stores, branches, warehouses</td>
<td>Point-of-sale and inventory management</td>
</tr>
<tr>
<td><strong>Defense</strong></td>
<td>Forward operating bases, field units</td>
<td>Mission-critical command and communications systems</td>
</tr>
</tbody>
</table>
<h2 id="edge-vs-data-center-ha-key-differences">Edge vs. Data Center HA: Key Differences</h2>
<table>
<thead>
<tr>
<th>Criterion</th>
<th>Data Center HA (WSFC, Pacemaker, VMware HA)</th>
<th>SafeKit Edge HA</th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>Storage</strong></td>
<td>Requires SAN/NAS shared storage</td>
<td>SANless — local disks only</td>
</tr>
<tr>
<td><strong>Hardware</strong></td>
<td>Dedicated cluster nodes, HBAs, switches</td>
<td>Any two standard x86 servers</td>
</tr>
<tr>
<td><strong>OS expertise</strong></td>
<td>Windows Datacenter or Linux cluster OS skills</td>
<td>Standard Windows/Linux admin skills</td>
</tr>
<tr>
<td><strong>On-site staff</strong></td>
<td>Required for setup and intervention</td>
<td>Not required — fully automatic</td>
</tr>
<tr>
<td><strong>Internet/cloud dependency</strong></td>
<td>Often cloud-managed</td>
<td>Fully air-gap capable</td>
</tr>
<tr>
<td><strong>Deployment scale</strong></td>
<td>Single data center</td>
<td>Hundreds of distributed sites</td>
</tr>
<tr>
<td><strong>License cost</strong></td>
<td>High (Datacenter OS, SAN licenses)</td>
<td>Single affordable software license per cluster</td>
</tr>
<tr>
<td><strong>Typical RTO</strong></td>
<td>1–5 minutes</td>
<td>Under 1 minute (configurable)</td>
</tr>
</tbody>
</table>
<h2 id="technical-minimum-requirements">Technical Minimum Requirements</h2>
<ul>
<li><strong>Servers:</strong> 2 standard x86 servers or VMs (any hardware brand, physical or virtual) or ARM (Linux only)</li>
<li><strong>OS:</strong> Windows Server 2019 / 2022 / 2025, Windows 11, RHEL 8/9, Ubuntu 24.04</li>
<li><strong>Network:</strong> 1 Gbps LAN for replication; dedicated heartbeat network recommended</li>
<li><strong>Storage:</strong> Local disks only — no SAN, no NAS, no shared storage of any kind</li>
<li><strong>No special OS edition</strong> — Windows Server Standard is sufficient; no Datacenter license required</li>
</ul>
<p>For full technical specifications, sizing constraints, and procurement criteria, see the <a href="/resources/high-availability-technical-reference-for-rfi-and-rfp-preparation/">RFP/RFI Technical Reference</a>.</p>
<h2 id="hub">🔍 SafeKit High Availability Navigation Hub</h2>
<p><strong>Explore SafeKit: Features, technical videos, documentation, and free trial</strong></p>
<table>
<thead>
<tr>
<th>Resource Type</th>
<th>Description</th>
<th>Direct Link</th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>Key Features</strong></td>
<td>Why Choose SafeKit for Simple and Cost-Effective High Availability?</td>
<td><a href="/#why-choose-safekit-for-ha" title="Discover SafeKit features for simple and cost-effective high availability">See Why Choose SafeKit for High Availability</a></td>
</tr>
<tr>
<td><strong>Use Cases</strong></td>
<td>Explore How SafeKit Ensures the High Availability of Critical Infrastructure</td>
<td><a href="/#safekit-use-cases" title="Explore SafeKit high availability use cases">See All Use Cases (OEM Software, Edge Servers, SCADA, and more)</a></td>
</tr>
<tr>
<td><strong>Deployment Model</strong></td>
<td>All-in-One SANless HA: Shared-Nothing Software Clustering</td>
<td><a href="/#all-in-one-sanless-ha" title="Learn about all-in-one SANless high availability with shared-nothing software clustering">See SafeKit All-in-One SANless HA</a></td>
</tr>
<tr>
<td><strong>HA Strategies</strong></td>
<td>SafeKit: Infrastructure (VM) vs. Application-Level High Availability</td>
<td><a href="/#safekit-ha-redundancy-choices" title="Compare VM-level redundancy with SafeKit application-level high availability strategies">See SafeKit HA &amp; Redundancy: VM vs. Application Level</a></td>
</tr>
<tr>
<td><strong>Technical Specifications</strong></td>
<td>Technical Limitations for SafeKit Clustering</td>
<td><a href="/#safekit-ha-limitations" title="Technical requirements and limitations for SafeKit application clustering">See SafeKit High Availability Limitations</a></td>
</tr>
<tr>
<td><strong>Proof of Concept</strong></td>
<td>SafeKit: High Availability Configuration &amp; Failover Demos</td>
<td><a href="/#safekit-failover-tutorials" title="Step-by-step videos on SafeKit high availability, from installation to automated failover">See SafeKit Failover Tutorials</a></td>
</tr>
<tr>
<td><strong>Architecture</strong></td>
<td>How the SafeKit Mirror Cluster works (Real-Time Replication &amp; Failover)</td>
<td><a href="/#safekit-mirror-cluster" title="See technical architecture and failover mechanism of SafeKit Mirror Cluster">See SafeKit Mirror Cluster: Real-Time Replication &amp; Failover</a></td>
</tr>
<tr>
<td><strong>Architecture</strong></td>
<td>How the SafeKit Farm Cluster works (Network Load Balancing &amp; Failover)</td>
<td><a href="/#safekit-farm-cluster" title="Technical overview of SafeKit Farm Cluster architecture with network load balancing">See SafeKit Farm Cluster: Network Load Balancing &amp; Failover</a></td>
</tr>
<tr>
<td><strong>Competitive Advantages</strong></td>
<td>Comparison: SafeKit vs. Traditional High Availability (HA) Clusters</td>
<td><a href="/#safekit-ha-comparison" title="Detailed comparison of SafeKit software vs traditional hardware-based HA clusters">See SafeKit vs. Traditional HA Cluster Comparison</a></td>
</tr>
<tr>
<td><strong>Technical Resources</strong></td>
<td>SafeKit High Availability: Documentation, Downloads &amp; Trial</td>
<td><a href="/#safekit-ha-technical-resources" title="Access SafeKit free trial, technical documentation, and high availability white papers">See SafeKit HA Free Trial &amp; Technical Documentation</a></td>
</tr>
<tr>
<td><strong>Pre-configured Solutions</strong></td>
<td>SafeKit Application Module Library: Ready-to-Use HA Solutions</td>
<td><a href="/#safekit-ha-application-modules" title="Browse the library of pre-configured SafeKit modules for automated application failover">See SafeKit High Availability Application Modules</a></td>
</tr>
</tbody>
</table>
<div class="button-row">
  <a class="btn-action" href="https://safekit.eviden.com/contact-us-for-safekit/">🧑 Contact us</a>
  <a class="btn-action" href="/resources/safekit-free-trial/">🎁 SafeKit free trial</a>
  <a class="btn-action" href="https://training.my.evidian.com/mod/page/view.php?id=712">🏅 Free certification</a>
  <a class="btn-action" href="https://safekit.eviden.com/get-a-quote-safekit/">💰 Perpetual license cost</a>
</div>