Best High Availability Cluster Solutions for Linux

Percona XtraDB Cluster (PXC) is a high availability, open-source, MySQL clustering solution that helps enterprises minimize unexpected downtime and data loss, reduce costs, and improve the performance and scalability of your database environments. PXC supports your critical business applications in the most demanding public, private, and hybrid cloud environments. Percona XtraDB Cluster (PXC) preserves, secures, and protects data and revenue streams by providing the highest level of availability for your business-critical applications. PXC helps you increase efficiency, eliminate license fees, and lower your total cost of investment, helping you meet budget constraints. Our integrated tools enable you to optimize, maintain, and monitor your cluster. This ensures you get the most out of your MySQL environment.

ClusterControl is a hybrid, multi-cloud database ops orchestration platform for MongoDB, Elasticsearch, Redis, TimescaleDB, SQL Server on Linux, Galera Cluster, PostgreSQL, and MySQL in on-premises, cloud, and hybrid environments. It handles full-lifecycle operations, from deployment to failover, backup and more. With its full suite of databases, ops features and ability to be deployed in any environment, it enables organizations to implement the Sovereign DBaaS concept. ClusterControl is perfect for organizations that need to reliably run large-scale, open-source database operations but don't want to be limited by traditional DBaaS providers in environment choice, open-source license stability, and DB access.

DRBD® (Distributed Replicated Block Device) is an open source, software‑based, shared‑nothing block storage replication solution for Linux, designed primarily to deliver high-performance, high‑availability (HA) data services by mirroring local block devices between nodes in real time, either synchronously or asynchronously. Implemented deep in the Linux kernel as a virtual block‑device driver, DRBD ensures local read performance with efficient write‑through replication to peer(s). User‑space utilities like drbdadm, drbdsetup, and drbdmeta enable declarative configuration, metadata management, and administration across installations. Originally built for two‑node HA clusters, DRBD 9.x extends support to multi‑node replication and integration into software‑defined storage (SDS) systems such as LINSTOR, making it suitable for cloud‑native environments.

NGINX Open Source: The open source web server that powers more than 400 million websites. NGINX Plus is a software load balancer, web server, and content cache built on top of open source NGINX. Use NGINX Plus instead of your hardware load balancer and get the freedom to innovate without being constrained by infrastructure. Save more than 80% compared to hardware ADCs, without sacrificing performance or functionality. Deploy anywhere: public cloud, private cloud, bare metal, virtual machines, and containers. Save time by performing common tasks through the built‑in NGINX Plus API. From NetOps to DevOps, modern app teams need a self‑service, API‑driven platform that integrates easily into CI/CD workflows to accelerate app deployment – whether your app has a hybrid or microservices architecture – and makes app lifecycle management easier.

DxEnterprise is multi-platform Smart Availability software built on patented technology for Windows Server, Linux and Docker. It can be used to manage a variety of workloads at the instance level—as well as Docker containers. DxEnterprise (DxE) is particularly optimized for native or containerized Microsoft SQL Server deployments on any platform. It is also adept at management of Oracle on Windows. In addition to Windows file shares and services, DxE supports any Docker container on Windows or Linux, including Oracle, MySQL, PostgreSQL, MariaDB, MongoDB, and other relational database management systems. It also supports cloud-native SQL Server availability groups (AGs) in containers, including support for Kubernetes clusters, across mixed environments and any type of infrastructure. DxE integrates seamlessly with Azure shared disks, enabling optimal high availability for clustered SQL Server instances in the cloud.

Deploy a reliable, performant, and feature-packed cloud server, available in Canada (Toronto and Montreal) and France (Roubaix). KVM cloud servers on redundant SSD disk arrays. Check out our pricing! Take live snapshots of your VM at any time to extract its current disk state for backups or cloning, without any downtime. Volumes are detachable disks stored on our high-availability cluster. Attach volumes to VMs for extra space, or provision VMs with a volume as the boot device. Automatically configure your VM during the boot process with bash and cloud-init startup scripts. Security groups allow you to define traffic restrictions on groups of virtual machines at the infrastructure level. Your VMs get their own private, isolated internal network, on which they can securely communicate. VMs can burst above their baseline performance for short periods to utilize additional CPU and I/O resources, making load spikes easier on your application.

The software load balancer, reverse proxy, web server, & content cache with the enterprise features and support you expect. Modern app infrastructure and dev teams love NGINX Plus. More than just the fastest web server around, NGINX Plus brings you everything you love about NGINX Open Source, adding enterprise‑grade features like high availability, active health checks, DNS system discovery, session persistence, and a RESTful API. NGINX Plus is a cloud‑native, easy-to-use reverse proxy, load balancer, and API gateway. Whether you need to integrate advanced monitoring, strengthen security controls, or orchestrate Kubernetes containers, NGINX Plus delivers the five‑star support you expect from NGINX. NGINX Plus provides scalable and reliable high availability along with monitoring to support debugging and diagnosing complex application architectures. Active health checks proactively poll upstream server status to get ahead of issues.

HPE Serviceguard for Linux (SGLX) is a high‑availability (HA) and disaster‑recovery (DR) clustering solution designed to maximize uptime for critical Linux workloads, on‑premises, in virtualized environments, or across hybrid and public clouds. It continuously monitors applications, services, databases, servers, networks, storage, and processes; upon detecting faults, it performs fast, automated failover, often within four seconds, without compromising data integrity. SGLX supports both shared‑storage and shared‑nothing architectures (via its Flex Storage add‑on), enabling highly available SAP HANA, NFS, or other services even where SAN isn’t available. The HA‑only E5 edition delivers zero‑RPO application failover with robust monitoring and a workload‑centric GUI, while the HA + DR E7 edition adds multi‑target replication, automated and push‑button site recovery, DR rehearsal, and workload mobility across on‑premises and cloud.

SIOS LifeKeeper for Windows is a comprehensive high-availability and disaster‑recovery solution that integrates failover clustering, continuous application monitoring, data replication, and flexible recovery policies to deliver 99.99 % uptime for Microsoft Windows Server environments—whether physical, virtual, cloud, hybrid‑cloud, or multicloud. Administrators can build SAN‑based or SANless clusters using a variety of storage types (direct‑attached SCSI, iSCSI, Fibre Channel, or local disk) and choose between local or remote standby servers that support both high availability and disaster recovery. LifeKeeper offers real‑time block‑level replication via bundled DataKeeper, with WAN‑optimized performance that includes nine levels of compression, bandwidth throttling, and integrated WAN acceleration, ensuring efficient replication across cloud regions or over WAN without hardware accelerators.

IBM Z System Automation is a NetView-based application that provides a single control point for a full range of system management functions. It plays a crucial role in supplying high-end automation solutions. IBM Z System Automation monitors, controls, and automates an extensive range of system elements spanning your enterprise's hardware and software resources. IBM Z System Automation is a policy-based, self-healing, high-availability solution designed to optimize the efficiency and availability of critical systems and applications. It reduces administrative and operational tasks, customization and programming effort, and automation implementation time and costs associated with Parallel Sysplex and policy-based automation. Using tight integration with Geographically Dispersed Parallel Sysplex (GDPS), IBM Z System Automation provides sophisticated disaster recovery capabilities for IBM Z systems.

Eliminate unplanned downtime and minimize data loss due to corruption or failure. The SLE HA extension includes geo clustering to manage clustered servers on-premises or in the cloud anywhere in the world. Our policy-driven, highly available extension for Linux clusters helps you maintain business continuity and minimize unplanned downtime across locations and geographies. Flexible, policy-driven clustering and continuous data replication boost flexibility while improving service availability and resource utilization by supporting the mixed clustering of both physical and virtual Linux servers. Install, configure, manage, and monitor your clustered Linux environments with a powerful unified interface. Multi-tenancy can be used to manage geo clusters according to your business needs.

With our Libelle BusinessShadow solution for disaster recovery and high availability, you can mirror databases and other application systems with a time delay. Your company is thus protected not only from the consequences of hardware and application errors, but also from the consequences of elemental damage, sabotage, or data loss due to human error. Our patented and dynamically adjustable time funnel temporarily stores the change logs before they are mirrored to the standby system. Switching over to this system in the event of an error or even maintenance can thus be carried out with impressive speed and without any fuss. The time funnel temporarily stores logs before they reach the standby system. You can quickly and easily switch to an error-free state. Your data is up to date and consistent, as it does not have to be laboriously reverted from a backup, but is temporarily stored in the time funnel.

Eddie is a high availability clustering tool. It is an open source, 100% software solution written primarily in the functional programming language Erlang (www.erlang.org) and is available for Solaris, Linux and *BSD. At each site, certain servers are designated as Front End Servers. These servers are responsible for controlling and distributing incoming traffic across designated Back End Servers, and tracking the availability of Back End Web Servers within the site. Back End Servers may support a range of Web servers, including Apache. The Enhanced DNS server which provides load balancing and monitoring of site accessibility for geographically distributed web sites. This gives round the clock access to the entire available capacity of the web site, no matter where it is located." The Eddie white papers describe the need for products such as Eddie, and outlines the Eddie approach.