Dual Hosts With Two Switches and Eight Controller Units

FIGURE 4-13shows two application hosts connected through FC-AL cables to two switches and eight Sun StorEdge T3+ arrays. This multi-initiator configuration, can be used for footprint and I/O throughput.

Note – This configuration is not a recommended for RAS functionality because the controller is a single point of failure.

The following limitations should be evaluated when proceeding with this configuration:

■Avoid the risk caused by any array or data path single point of failure using host- based mirroring software such as VERITAS Volume Manager or Solaris Logical Volume Manager.

■When configuring more than a single array to share a single FC-AL loop, as with a hub, array target addresses need to be set to unique values.

Each array needs to be assigned a unique target address using the port set command. These target addresses can be any number between 1 and 125. At the factory, the array target addresses are set starting with target address 1 for the bottom array and continuing to the top array. Use the port list command to verify that all arrays have a unique target address. Refer to Appendix A of the Sun StorEdge T3 and T3+ Array Administrator’s Guide for further details.

The following two parameters must be set on the master controller unit, as follows:

■cache mode = auto

■cache mirroring = auto

Note – For information on setting these parameters, refer to the Sun StorEdge T3 and T3+ Array Administrator’s Guide.

48 Sun StorEdge T3 and T3+ Array Configuration Guide • August 2001

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Sun Microsystems T3 manual Dual Hosts With Two Switches and Eight Controller Units
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T3 specifications

Sun Microsystems T3 is a high-performance scalable server designed to meet the demanding requirements of enterprise-level computing. Introduced as part of the Sun Fire server lineup, the T3 was built to cater to organizations that needed both flexibility and reliability in their IT infrastructure.

One of the key features of the Sun T3 is its SPARC T3 processor, which integrates several cores on a single chip. This processor architecture allows for simultaneous multithreading, maximizing the utilization of resources and enhancing throughput. The SPARC T3 can support up to 16 cores, which means that it can handle a significant number of threads at once, making it an excellent choice for web applications, database processing, and other high-demand environments.

The T3's memory architecture also stands out. The system can support up to 1TB of memory with up to 128 DIMM slots, allowing for large data sets to be processed with ease. This large memory capacity provides ample room for memory-intensive applications and ensures smooth performance even under heavy loads.

Moreover, the Sun T3 is equipped with a unique virtualization technology known as Oracle VM Server for SPARC. This allows businesses to run multiple operating systems and applications on the same physical machine, reducing the need for additional hardware and simplifying management tasks. The virtualization capabilities contribute to cost savings while improving resource utilization.

In addition, the T3 features advanced I/O capabilities with multiple connectivity options, including Ethernet, Fibre Channel, and Serial Attached SCSI (SAS). This flexibility ensures that the system can be integrated into various network environments and supports a wide range of storage solutions.

Furthermore, the T3 is designed for enhanced energy efficiency. Sun Microsystems embedded their CoolThreads technology, which significantly reduces power consumption compared to traditional server architectures. This focus on energy efficiency not only helps in reducing operational costs but also supports corporate sustainability initiatives.

The T3 also incorporates robust security features, including hardware-based security mechanisms that protect data and facilitate secure operations. This is particularly important for businesses that handle sensitive information and are subject to regulatory compliance.

In summary, Sun Microsystems T3 is a formidable server that combines advanced processing power, scalability, virtualization capabilities, and energy efficiency. Its architecture and design make it suitable for a wide array of enterprise applications, positioning it as a reliable foundation for businesses looking to enhance their IT infrastructure.
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