What operating system is required for an on-premise High Availability install?

A Linux operating system is required for an on-premise High Availability install of Appian for several reasons related to performance, stability, and scalability characteristics inherent to Linux systems.

Linux is widely recognized for its robust architecture and ability to handle high-performance workloads, making it a popular choice for enterprise applications, particularly those requiring high availability. It provides advanced functionality for managing resources and running multiple applications seamlessly, which is crucial in an environment that demands failover capabilities and minimal downtime.

Furthermore, Linux supports various clustering technologies and tools that facilitate high availability setups, which are essential for ensuring continuous operation and quick recovery in case of system failures. Appian's architecture is optimized for deployment on Linux, ensuring that all components function efficiently and reliably in a high availability context.

The other operating systems, like Windows and MacOS, while capable of running many applications, do not offer the same extensive support for the high availability features that Linux does. Ubuntu, although a Linux distribution, is specific but not inherently required for the standard Appian High Availability setup, which is typically based on broader Linux environments.