Chapter 1
Server Hardware Installation and Management
Course: Comptia Server Sk0 005
Subject: Comptiaserver Sk0 005
Chapter: Server Administration
High Availability (HA) refers to the strategies and technologies used to ensure systems remain operational and accessible with minimal downtime, even during failures or maintenance. This is critical in enterprise IT, financial services, healthcare, and other uptime-sensitive environments.
1. Clustering
Clustering refers to the practice of connecting multiple servers (nodes) to function as a unified system. This approach ensures service continuity, scalability, and fault tolerance. When one node fails, others seamlessly maintain operations, minimizing downtime.
a. Active-Active Clustering
- All nodes in the cluster are online and actively share the workload.
- This setup distributes client requests or transactions across all active servers.
- It provides load balancing, high availability, and performance scalability.
Requirements:
- The application or service must support simultaneous multi-node access.
- Must include data consistency mechanisms like distributed locking or synchronized storage access.