Sun Cluster software poskytuje aplikacím failover pro zajišťení vysoké dostupnosti kriticky důležitým aplikacím.
Dva a více serverů (nodů) v clusteru spolu komunikují pomocí interconnectu
| Interconnect | Latency | Prokol | Propustnost |
|---|---|---|---|
| Memory Channel | 33us | RDG | 100 MB/s |
| Fast Ethernet | 100us | UDP | 10 MB/s |
| Gigabit Ethernet | 40us | UDP | 100 MB/s |
| SCI (Sun) | 10us | RSM | 1 Gb/s |
By tightly coupling Sun’s servers, storage and networking solutions, Sun Cluster provides the maximum level of service availability and performance for a cluster system. The servers (nodes) in a cluster communicate through private interconnects. These interconnects carry important cluster information (data as well as a cluster “heartbeat”). This heartbeat lets the servers in the cluster know the health of the other servers within the cluster, ensuring that each server is “alive”. If one of the servers goes offline and ceases its heartbeat, the rest of the devices in the cluster isolate the server and “fail-over” any application or data from the failing node to another node. This failover process is done quickly and transparently to the users of the system. By exploiting the redundancy in the cluster, Sun Cluster ensures the highest levels of availability.
A Sun Cluster agent is a k-sh script, a C-program, or a binary that manages the availability of an application. The agent starts, stops, monitors the health of the application, and takes corrective action to regain application availability upon failure. Applications need not be modified to benefit from the enhanced availability offered by the Sun Cluster agent. The Sun Cluster group, as well as other third-party software vendors, have created several pre-made agents for popular applications such as Java Enterprise System Applications, Oracle, Siebel, SAP, Sybase, Sun middleware applications and many others.
If your application does not have an agent already made for it, you can create your own using the SunPlex Agent Builder (included with the Sun Cluster software). This agent builder has an easy to use, “wizard” graphical user interface which leads the user step by step through the process of creating an agent. After the user completes the agent builder process, a ready-to-use agent is created (the whole process takes only a few minutes from start to finish).
A: No, you can only install Sun Cluster 3.1 8/05 on Sun x86 systems that are supported with Sun Cluster. This includes the Sun Fire V40z and Sun Fire X4100, X4200.
Sun Cluster Agent for Oracle RAC; A proven and mature service level management for Oracle RAC that guarantees maximum uptime; Shared file system with Sun StorEdge QFS software to ease administration without reducing performance; I/O fencing to guarantee data integrity; and Tighter integration with the Solaris 10 Operating System to minimize downtime for customers’ applications.