A server node is a computer within a network that runs services or back-end applications, typically accessing data on shared external storage. Essentially, it's the workhorse that provides essential functions to other computers (clients) on the network.
Understanding Server Nodes
Server nodes play a crucial role in network infrastructure. They differ from client nodes, which are usually the computers used directly by individuals.
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Function: Server nodes primarily provide services. These services can include:
- Database access
- File sharing
- Application hosting
- Web services
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Data Storage: Server nodes often access data stored on shared external disks, ensuring data is centrally managed and accessible.
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Back-end Operations: Unlike client nodes handling front-end applications, server nodes focus on the back-end, processing requests and managing data.
Server Node vs. Client Node
| Feature | Server Node | Client Node |
|---|---|---|
| Primary Role | Provides services, hosts applications | Accesses services, runs front-end apps |
| Data Access | Accesses shared external disks | Retrieves data from server nodes |
| Operation | Back-end processing | Front-end interaction |
| Example | Database server, web server | Desktop computer, laptop |
Importance in a Network
Server nodes are fundamental for creating a functional network. They facilitate:
- Centralized data management: Ensures data consistency and security.
- Resource sharing: Allows multiple clients to access shared resources like files and printers.
- Scalability: Enables networks to grow and handle increasing workloads by adding more server nodes.
- Security: Server nodes can implement security measures to protect data and prevent unauthorized access.
PowerHA SystemMirror and Server Nodes
In environments using PowerHA SystemMirror, client nodes can monitor the health of server nodes and react to failures. This helps ensure high availability and minimizes downtime. While client nodes monitor the health of server nodes, the server nodes are the entities that actually provide the vital services.
In essence, a server node is the back-end engine powering the network, providing essential services and data to client devices.
