List of the Top 13 High Availability Cluster Solutions for Linux in 2025

Percona XtraDB Cluster (PXC) is a high-availability, open-source clustering solution for MySQL that enables businesses to minimize unexpected downtime and data loss while enhancing performance and scalability. Enterprises benefit from its ability to support vital applications in both public and private cloud settings, thereby ensuring operational continuity. By delivering maximum availability for critical applications, PXC helps safeguard data and revenue streams effectively. Furthermore, it provides a cost-efficient alternative by eliminating license fees and adhering to budget limitations. With integrated tools designed for optimization, maintenance, and monitoring, users can fully leverage their MySQL environments and achieve optimal performance. This comprehensive approach not only streamlines database management but also empowers organizations to focus on growth and innovation.

ClusterControl serves as a versatile orchestration platform for managing hybrid database operations across various cloud environments, supporting a range of databases such as MongoDB, Elasticsearch, Redis, TimescaleDB, and SQL Server on Linux, in addition to Galera Cluster, PostgreSQL, and MySQL for both cloud and on-premises setups. This platform efficiently manages the complete database lifecycle, encompassing deployment, failover, backup, and more, enabling organizations to adopt a Sovereign DBaaS model with a comprehensive array of database and operations functionalities. Ideal for businesses seeking to conduct extensive, open-source database operations with reliability, ClusterControl liberates users from the constraints typical of conventional DBaaS providers, offering flexibility in environment choice, license stability, and direct database access, ultimately empowering organizations to optimize their database management strategies more effectively.

DRBD® (Distributed Replicated Block Device) is an open-source solution focused on block storage replication for Linux, designed to deliver high-performance and high-availability (HA) data services by either synchronously or asynchronously mirroring local block devices between nodes in real-time. As a virtual block-device driver that is intricately woven into the Linux kernel, DRBD ensures optimal local read performance while enabling efficient write-through replication to partner devices. The accompanying user-space tools, such as drbdadm, drbdsetup, and drbdmeta, enhance the management experience through declarative configuration, metadata handling, and comprehensive administration across various installations. Originally created for two-node HA clusters, the latest iteration, DRBD 9.x, has adapted to support multi-node replication and integrate smoothly into software-defined storage (SDS) systems like LINSTOR, broadening its utility in cloud-native environments. This progression underscores the increasing necessity for resilient data management solutions in today's complex technological landscape, highlighting the importance of adaptability in meeting evolving demands.

NGINX Open Source powers more than 400 million websites around the world. Building on this robust foundation, NGINX Plus functions as an all-in-one software solution that combines load balancing, web serving, and content caching capabilities. By choosing NGINX Plus over conventional hardware load balancers, businesses can explore innovative opportunities without the constraints of traditional infrastructure, resulting in savings exceeding 80% while still achieving excellent performance and reliability. This versatile platform can be deployed across various settings, which include public and private clouds, bare metal servers, virtual machines, and containerized environments. Furthermore, the built-in NGINX Plus API streamlines the completion of routine tasks, thereby boosting operational efficiency. In an era where agility is essential, today's NetOps and DevOps teams require a self-service, API-centric approach that integrates smoothly with CI/CD workflows, which not only accelerates application deployments but also enhances the management of application lifecycles. As technology continues to advance rapidly, NGINX Plus emerges as an indispensable resource for improving operational flexibility and optimizing the use of available resources. It is a pivotal asset for organizations aiming to stay competitive in a fast-paced digital world.

DxEnterprise is an adaptable Smart Availability software that functions across various platforms, utilizing its patented technology to support environments such as Windows Server, Linux, and Docker. This software efficiently manages a range of workloads at the instance level while also extending its functionality to Docker containers. Specifically designed to optimize native and containerized Microsoft SQL Server deployments across all platforms, DxEnterprise (DxE) serves as a crucial tool for database administrators. It also demonstrates exceptional capability in managing Oracle databases specifically on Windows systems. In addition to its compatibility with Windows file shares and services, DxE supports an extensive array of Docker containers on both Windows and Linux platforms, encompassing widely used relational database management systems like Oracle, MySQL, PostgreSQL, MariaDB, and MongoDB. Moreover, it provides support for cloud-native SQL Server availability groups (AGs) within containers, ensuring seamless compatibility with Kubernetes clusters and a variety of infrastructure configurations. DxE's integration with Azure shared disks significantly enhances high availability for clustered SQL Server instances in cloud environments, making it a prime choice for companies looking for reliability in their database operations. With its powerful features and adaptability, DxE stands out as an indispensable asset for organizations striving to provide continuous service and achieve peak performance. Additionally, the software's ability to integrate with existing systems ensures a smooth transition and minimizes disruption during implementation.

Discover a powerful, efficient, and feature-packed cloud server solution that provides services in both Canada—specifically in Toronto and Montreal—and France, particularly in Roubaix. Our KVM cloud servers are equipped with redundant SSD disk arrays, guaranteeing both speed and reliability. Take advantage of our competitive pricing options! You can capture live snapshots of your virtual machine at any point in time, enabling you to save its current disk state for backup or cloning without experiencing any downtime. For additional storage needs, detachable volumes are available and stored on our high-availability cluster, which can be connected to virtual machines for expanded storage or used as boot devices. The boot process can be seamlessly automated using bash scripts and cloud-init, enhancing your setup experience. With security groups, you can impose traffic restrictions on groups of virtual machines at the infrastructure level, significantly boosting security. Each virtual machine benefits from its own private, isolated internal network, facilitating secure communication between them. Moreover, our virtual machines can temporarily exceed their standard performance levels, allowing them to utilize extra CPU and I/O resources during periods of high demand, thus alleviating pressure on your application. This combination of flexibility, performance, and security positions our cloud services as a premier option for all your hosting requirements. Choose our solution for robust hosting that adapts to your needs!

NGINX Plus functions as a comprehensive software load balancer, reverse proxy, web server, and content cache, delivering the high-quality features and support that enterprises expect. It is especially popular among contemporary application development and infrastructure teams due to its remarkable efficiency. Renowned as one of the fastest web servers available, NGINX Plus builds upon the strengths of NGINX Open Source by adding essential enterprise features such as active health checks, high availability, DNS service discovery, session persistence, and a RESTful API framework. Its design as a cloud-native and user-friendly solution makes it an excellent choice for reverse proxying, load balancing, and serving as an API gateway. Whether you're aiming to improve monitoring, reinforce security protocols, or oversee Kubernetes container orchestration, NGINX Plus guarantees exceptional support that aligns with the NGINX brand. Furthermore, it provides a scalable and reliable high availability system, complete with monitoring tools that aid in troubleshooting and understanding complex application architectures. In addition to its proactive health checks that consistently assess the condition of upstream servers, NGINX Plus empowers teams to identify and resolve potential challenges effectively before they grow into significant problems, ensuring smooth operations and enhanced performance.

HPE Serviceguard for Linux (SGLX) is a robust clustering solution designed for high availability (HA) and disaster recovery (DR), aimed at ensuring continuous uptime for critical Linux workloads, whether they operate on-premises, in virtual environments, or across hybrid and public cloud infrastructures. It meticulously monitors application performance, services, databases, servers, networks, storage, and processes, and upon detecting any issues, it promptly triggers automated failover, typically in under four seconds, while upholding data integrity. Supporting both shared-storage and shared-nothing setups, SGLX utilizes its Flex Storage add-on to deliver highly available services like SAP HANA and NFS, particularly in scenarios where SAN is unavailable. The E5 edition, dedicated solely to HA, features zero-RPO application failover, comprehensive monitoring capabilities, and an intuitive workload-centric graphical interface for ease of use. On the other hand, the E7 edition combines HA and DR functionalities, offering features such as multi-target replication, one-click automated recovery, rehearsals for disaster recovery, and the ability to seamlessly move workloads between on-premises and cloud environments, thereby boosting operational resilience. This adaptability of SGLX makes it an indispensable tool for organizations striving to ensure uninterrupted service availability amidst potential disruptions, ultimately contributing to enhanced business continuity strategies.

SIOS LifeKeeper for Windows serves as a comprehensive solution focused on ensuring high availability and disaster recovery by integrating a variety of features, such as failover clustering, continuous application monitoring, data replication, and customizable recovery policies, which collectively drive an outstanding 99.99% uptime across diverse Microsoft Windows Server environments, including physical, virtual, cloud, hybrid-cloud, and multicloud configurations. System administrators have the versatility to create SAN-based or SANless clusters with a range of storage options, including direct-attached SCSI, iSCSI, Fibre Channel, or local disks, while also being able to choose between local or remote standby servers to meet high availability and disaster recovery needs effectively. The platform's real-time block-level replication, facilitated by the integrated DataKeeper, delivers WAN-optimized performance, incorporating nine distinct levels of compression, bandwidth throttling, and built-in WAN acceleration, which ensures efficient data replication across cloud regions or WAN networks without the need for extra hardware accelerators. This powerful solution not only bolsters operational resilience but also streamlines the management of intricate IT infrastructures, allowing organizations to focus on their core functions. In conclusion, SIOS LifeKeeper emerges as an essential resource for businesses that strive to achieve uninterrupted service and effectively protect their critical data assets while navigating the complexities of modern IT environments.

IBM Z System Automation is an application developed on the NetView platform that acts as a centralized hub for overseeing a vast range of system management activities. Its importance is highlighted by its provision of sophisticated automation solutions that are customized for the needs of enterprises. By adeptly monitoring, controlling, and automating an extensive array of system components, it addresses both hardware and software resources within the organization. This self-healing, policy-driven, and high-availability solution is specifically designed to enhance the performance and uptime of critical systems and applications. Furthermore, it significantly reduces the administrative and operational burden, diminishes the necessity for extensive customization and programming, and accelerates the time and costs associated with implementing automation, particularly in environments utilizing Parallel Sysplex and policy-driven automation. Additionally, its seamless integration with Geographically Dispersed Parallel Sysplex (GDPS) endows IBM Z System Automation with sophisticated disaster recovery capabilities, providing robust safeguards for IBM Z systems against potential disruptions. Overall, its diverse functionalities render it an essential asset for contemporary enterprises that depend on high availability and operational efficiency. In a rapidly evolving technological landscape, such tools are crucial for maintaining competitive advantage and ensuring uninterrupted business operations.

Minimize unexpected system downtime and mitigate the risk of data loss due to corruption or failures. The SLE HA extension includes geo-clustering capabilities that enable the management of clustered servers, whether they are situated on-site or in cloud environments around the world. Our robust, policy-driven extension for Linux clusters guarantees that your business remains functional while drastically lowering instances of unplanned downtime across different regions and locations. By employing flexible, policy-oriented clustering and continuous data replication, adaptability is enhanced while improving service availability and resource efficiency through the integration of both physical and virtual Linux server clusters. A comprehensive, unified interface simplifies the installation, configuration, management, and monitoring of your clustered Linux environments. Furthermore, the multi-tenancy feature allows for the organization of geo clusters in accordance with distinct business needs, ensuring customized management and peak performance. This all-encompassing strategy not only fortifies system resilience but also bolsters operational efficiency, allowing your organization to thrive in a dynamic landscape. Embracing such advanced solutions ultimately positions your business for sustained success and competitiveness in the market.

Our Libelle BusinessShadow solution presents a powerful method for ensuring disaster recovery and maintaining high availability by allowing the mirroring of databases and application systems with a regulated time delay. This cutting-edge solution protects your organization from a variety of threats, including hardware malfunctions, software issues, natural disasters, sabotage, and unintentional data loss. At the core of this system is our patented time funnel, which effectively stores change logs before they are sent to the standby system. This architecture facilitates a smooth and swift transition to the backup configuration during errors or maintenance, thereby minimizing interruptions. By utilizing the time funnel, you can quickly restore an error-free state without the tedious process of pulling data from backups. Importantly, your information remains consistently current, as it is temporarily held in the time funnel instead of relying solely on outdated backup versions. This solution not only bolsters resilience but also optimizes operational efficiency, granting reassurance in the event of unforeseen disruptions. Ultimately, Libelle BusinessShadow empowers organizations to navigate challenges with confidence and agility.

Eddie operates as a robust tool for high availability clustering, serving as a completely open-source software solution mainly crafted in the functional programming language Erlang (www.erlang.org) and works effectively with Solaris, Linux, and *BSD operating systems. In this setup, certain servers are designated as Front End Servers, which are responsible for managing and distributing incoming traffic to the appropriate Back End Servers, while also keeping track of the operational status of those Back End Web Servers at the site. The Back End Servers can support various Web server platforms, such as Apache, and include an Enhanced DNS server that not only aids in load balancing but also monitors site accessibility for web platforms located in different geographical regions. This configuration guarantees uninterrupted access to the website's full capabilities, regardless of its physical location. The white papers focusing on Eddie explore the importance of such solutions and detail its distinctive methodology. This thorough examination underscores Eddie's vital function in ensuring smooth web operations across a variety of environments while promoting consistent user experiences. Ultimately, the architecture of Eddie represents an essential advancement in modern web infrastructure.