Fault-Tolerant Servers are servers designed to improve system availability and stability. The main difference between fault-tolerant servers and ordinary servers is the goals for which they are designed and implemented, and their ability to handle failures in the system.

　　Troubleshooting capabilities:

　　Fault-tolerant server: The design goal of this type of server is to maintain system availability and stability to the greatest extent. They typically have multiple redundant components such as redundant power supplies, redundant storage, redundant network connections, etc. Fault-tolerant servers are able to automatically switch to backup components in the event of hardware failure, with little to no system disruption felt by users or applications.

　　Ordinary servers: The design of ordinary servers focuses on performance and cost-effectiveness, but does not necessarily emphasize the speed and transparency of failure recovery. They may experience some downtime in the event of a failure until the problem is resolved or a backup system takes over.

　　Usability and stability:

　　Fault-tolerant server: Emphasis on keeping the system running to the greatest extent and being able to provide services even in the event of hardware failure. These servers are typically designed to continue functioning without affecting the user experience.

　　Ordinary servers: May experience some downtime when a failure occurs, which may have a certain impact on business and users.

　　cost:

　　Fault-tolerant servers: Typically more expensive because they require additional hardware and technology for redundancy and failover.

　　Regular servers: Typically more affordable because they focus on delivering performance rather than excessive redundancy.

　　Design Principles:

　　Fault-tolerant servers: Use multiple redundancy and self-healing mechanisms to ensure that the system can continue to operate when a single component fails.

　　Normal server: Usually more simplified and focused on performance and functionality.

　　Generally speaking, fault-tolerant servers are designed to provide high availability and stability, while ordinary servers focus more on affordability and performance. Which type of server you choose depends on your specific business needs, budget, and requirements for system availability.