Sun Microsystems T3 manual Logical Volumes, Enabling Mirrored Cache, Configuring Cache Allocation

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Note – The data block size must be configured before any logical volumes are created on the units. Remember, this block size is used for every logical volume created on the unit. Therefore it is important to have similar application data configured per unit.

Data block size is universal throughout a partner group. Therefore, you cannot change it after you have created a volume. To change the data block size, you must first delete the volume(s), change the data block size, and then create new volume(s).

Caution – Unless you back up and restore the data on these volumes, it will be lost.

Enabling Mirrored Cache

By enabling mirrored cache, you can safeguard cached data if a controller fails.

Note – Mirrored cache is possible only in a redundant enterprise configuration.

Configuring Cache Allocation

Cache is allocated based on the read/write mix and it is dynamically adjusted by the controller firmware, based on the I/O profile of the application. If the application profile is configured for a 100% read environment, then 100% of the cache is used for reads. If the application profile has a high number of writes, then the upper limit for writes is set to 80%.

Logical Volumes

Also called a logical unit number (LUN), a logical volume is one or more disk drives that are grouped together to form a single unit. Each logical volume is represented to the host as a logical unit number. Using the format utility on the application host, you can view the logical volumes presented by the array. You can use this disk space as you would any physical disk, for example, to perform the following operations:

Install a file system

Use the device as a raw device (without any file system structure)

Partition the device

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

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Contents Sun StorEdge T3 and T3+ Array Configuration Guide Please Recycle Contents Configuring Partner Groups Host Connections Glossary Figures Sun StorEdge T3 Array Controller Card and Interconnect Cards Preface Before You Read This Book How This Book Is OrganizedUsing Unix Commands Typographic ConventionsShell Prompts Related DocumentationAccessing Sun Documentation Online Sun Welcomes Your CommentsArray Configuration Overview Product DescriptionController Card 1Sun StorEdge T3 Array Controller Card and Ports Interconnect Cards 2Sun StorEdge T3+ Array Controller Card and PortsInterconnect cards Output Input Array Configurations 4Workgroup Configuration5Enterprise Configuration Configuration Guidelines Restrictions Configuration Recommendations Supported PlatformsSupported Software Sun Cluster SupportArray Configuration Overview Sun StorEdge T3 and T3+ Array Configuration Guide August Configuring Global Parameters CacheConfiguring Cache for Performance and Redundancy Configuring Data Block Size Selecting a Data Block SizeConfiguring Cache Allocation Logical VolumesEnabling Mirrored Cache Guidelines for Configuring Logical Volumes Determining How Many Logical Volumes You NeedDetermining Which RAID Level You Need Creating and Labeling a Logical Volume Setting the LUN Reconstruction RateUsing RAID Levels to Configure Redundancy RAID Configuring RAID Levels Configuring Partner Groups Understanding Partner Groups1Sun StorEdge T3 Array Partner Group How Partner Groups Work Creating Partner Groups Configuration Examples Direct Host ConnectionSingle Host With One Controller Unit 1Single Host Connected to One Controller UnitConfiguration Examples Host Multipathing Management Software LUNFC-AL Sun StorEdge T3 and T3+ Array Configuration Guide August FC-AL HBA LAN Hub Host Connection Application host HBA Sun StorEdge T3 and T3+ Array Configuration Guide August Management host Cache mode = auto Cache mirroring = auto Dual Hosts With Two Hubs and Four Controller UnitsPort Dual Hosts With Two Hubs and Eight Controller Units Controller unit Hub Sun StorEdge T3 and T3+ Array Configuration Guide August HBA Sun StorEdge T3 and T3+ Array Configuration Guide August Hub Application host Switch Host Connection Dual Hosts With Two Switches and Two Controller UnitsSwitch Dual Hosts With Two Switches and Eight Controller Units FC-AL LAN Sun StorEdge T3 and T3+ Array Configuration Guide August Host Connections Sun Enterprise SBus+ and Graphics+ I/O Boards System RequirementsSun StorEdge PCI FC-100 Host Bus Adapter 2Sun StorEdge PCI FC-100 Host Bus AdapterSun StorEdge SBus FC-100 Host Bus Adapter 3Sun StorEdge SBus FC-100 Host Bus AdapterSun StorEdge PCI Single Fibre Channel Network Adapter 4Sun StorEdge PCI Single Fibre Channel Network AdapterSun StorEdge PCI Dual Fibre Channel Network Adapter 5Sun StorEdge PCI Dual Fibre Channel Network AdapterSun StorEdge CompactPCI Dual Fibre Channel Network Adapter 6Sun StorEdge CompactPCI Dual Fibre Channel Network AdapterSun StorEdge T3 and T3+ Array Configuration Guide August Overview of Array Cabling Data PathAdministration Path Connecting Partner GroupsLC-SFF Workgroup Configurations 3Array Workgroup ConfigurationEnterprise Configurations 4Enterprise ConfigurationSun StorEdge T3 and T3+ Array Configuration Guide August Administrative GlossaryCommand-line interface Flash memory device Light-emitting diode Multi-initiator Reverse address resolution protocol Workgroup Sun StorEdge T3 and T3+ Array Configuration Guide August Index HBA RAID Sun StorEdge T3 and T3+ Array Configuration Guide August
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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.