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| Oracle Solaris Cluster 4.1 Security Guide Oracle Solaris Cluster 4.1

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## Overview of Oracle Solaris Cluster and Security

The Oracle Solaris Cluster environment extends the Oracle Solaris Operating System into a cluster operating system. A cluster is a collection of one or more nodes that belong exclusively to that collection.

The benefits of the Oracle Solaris Cluster software include the following:

- Reduce or eliminate system downtime because of software or hardware failure

- Ensure availability of data and applications to end users, regardless of the kind of failure that would normally take down a single-server system

- Increase application throughput by enabling services to scale to additional processors by adding nodes to the cluster and balancing load

- Provide enhanced availability of the system by enabling you to perform maintenance without shutting down the entire cluster

A cluster offers several advantages over traditional single-server systems. These advantages include support for failover and scalable services, capacity for modular growth, the ability to set load limits on nodes, and low entry price compared to traditional hardware fault-tolerant systems.

In a cluster that runs on the Oracle Solaris OS, a global cluster and a zone cluster are types of clusters. Clusters can be global clusters, zone clusters, or a combination of both. To learn more about the benefits of configuring a zone cluster, see Oracle Solaris Cluster Concepts Guide.

### General Security Principles

The following principles are fundamental to using the Oracle Solaris Cluster application securely.

- Keep software up to date

- Restrict network access to critical services

- Follow the principle of least privilege

- Monitor system activity

- Keep up to date on the latest Oracle security information

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