NetPlane Core Services

SAF-Compliant NCS Services

 

 

The SNMP access point comprises an SNMP agent and subagent based on an open-source Linux implementation, The NCS SNMP subagent integrates SNMP requests via the management Access agent. Application-specified additional managed objects (MIBs) can be dynamically added to the subagent.

2.5SAF-Compliant NCS Services

This section briefly describes those NCS services which implement standard SAF services. For each service an architectural overview and a functional description is given. Furthermore, a reference to user manuals is given where you can find more detailed information.

2.5.1Availability Service

The Availability Service (AvSv) provides the following functionality:

zLeverage the SAF "System Description and Conceptual Model"

zHonour the Availability Management Framework" API

zHonour the SA Cluster membership Service API

zHouse the MIB tables corresponding to the hardware portion of the deployment system description which includes entity containment and fault domain hierarchy information

zHouse the MIB tables corresponding to the software portion of the deployment system description which include configuration of AMF-defined logical entities and their relationship

zPerform blade validation on receipt of HPI hot swap insertion events

zHandle fault events such as HPI hot swap extraction events, threshold crossing events etc.

The AvSv maintains a software system model database which captures SAF-described logical entities and their relationships to each other. The software system model database is initially configured from data contained in the System Description file. Through time the system model will modify due to changing system realities and administrative actions.

The SAF logical entities related in the system model include components which normalize the view of physical resources such as processes, drivers or devices. Components are grouped into Service Units according to fault dependencies that exist among them. A Service Unit is also scoped to one or more (physical) fault domains. Service Units of the same type are grouped into Service Groups (SG) which exhibit particular redundancy modelling characteristics. Service Units within a SG are assigned to Service Instances (SI) and given a High Availability state of active and standby.

The hardware database maintained by AvSv includes hardware entity containment information and the hardware fault domain hierarchy. All hardware entities are represented by their HPI entity paths. The hardware entity containment tree only includes managed FRUs which may or may not include processor environments., and non-FRU resources which include processor environments. The fault domain data includes dependency relationships between parent-child entities as well as non-parent child entities. The hardware system model also includes

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NetPlane Core Services Overview User’s Guide (6806800C08B)

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Motorola 6806800C08B manual Availability Service, NetPlane Core Services SAF-Compliant NCS Services
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6806800C08B specifications

The Motorola 68000 microprocessor, particularly the revision marked as 68000C08B, stands out as a seminal component in the evolution of computing technology. Introduced in 1979, the 68000 architecture laid the groundwork for many advanced systems, influencing a multitude of platforms, from personal computers to game consoles.

The Motorola 68000C08B features a 16-bit data bus and a 24-bit address bus, allowing for a memory addressing capability of up to 16 MB. This architecture was pioneering for its time, enabling more extensive and complex software applications than its predecessors. The C08 revision particularly emphasized optimizing power consumption while maintaining performance, making it ideal for embedded systems and portable devices.

One of the 68000's key characteristics is its unique register set, which allows for a versatile range of operations. It consists of 8 general-purpose data registers and 8 address registers. The architecture supports both integer and floating-point operations, thanks to an integrated instruction set that facilitates complex mathematical computations, crucial for applications in graphics and gaming.

In terms of performance, the 68000 processor operates at clock speeds ranging from 8 MHz to 16 MHz, depending on the specific variant. The instruction set architecture (ISA) is known for its orthogonality, meaning that most instructions can be used interchangeably across different registers. This design simplicity allows for efficient coding and faster execution times, a significant advantage for developers.

Another remarkable feature of the 68000C08B is its capability for multitasking and improved context switching. Its advanced memory management, combined with support for virtual memory in later implementations, catered to the needs of operating systems and real-time applications, making it suitable for both consumer electronics and industrial machinery.

The Motorola 68000 family also supports a variety of peripherals, enhancing its flexibility as a microcontroller. This compatibility allowed manufacturers to create diverse product lines, from keypads and mice to modems and hard drives.

In summary, the Motorola 68000C08B microprocessor not only advanced the landscape of computer technology in the late 20th century but also helped set the stage for future innovations through its architecture, performance capabilities, and versatility in numerous applications. Its legacy continues to influence modern computing paradigms, ensuring the 68000 remains an essential chapter in the history of microprocessors.
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