Message-Based Checkpointing Service

NetPlane Core Services

 

 

2.6.6.2.3Management Access Server

The Management Access Server (MAS) manages the database of managed objects. It performs the following tasks:

z Receiving managed object row ownership information from the OAAs z Direct management access requests from MAAs to the proper OAA

2.6.6.2.4Command Line Interpreter Management Access Point

The Command Line Interpreter (CLI) provides a command-line based user interface for the NCS system. It provides a mechanism for describing commands that can be used to manage configurable entities. The commands are customizable depending on the needs of the application or NCS and are dynamically registered and deregistered. The functionality provided by the CLI includes:

z Displaying of available commands and results

z Programmatic description of command syntax and semantics z Menu navigation

z Key assignment properties (hot keys)

z Dynamic registering of command descriptions

z Fetching character stream from input sources such as a file or terminal

z Matching character stream against all possible command descriptions and when a match is found invoke respective function

The CLI provides an API which allows applications or NCS services to register and deregister CLI commands. A detailed description of this API can be found in the Command Line Interface Programmer's Reference.

2.6.6.2.5SNMP Management Access Point

The SNMP Management Access Point is an SNMP subagent whose purpose is to provide a mapping between the SNMP management agent and the MASv. This mapping allows applications and NCS services to access managed objects maintained by applications and NCS services. The main tasks of the SNMP Management Access Point are:

z Registering MIB rows with the SNMP master agent

z Receiving and forwarding SNMP requests from the SNMP master agent For further details refer to the SNMP SubAgent Programmer's Reference.

2.6.7Message-Based Checkpointing Service

The Message-Based Checkpointing Service (MBCSv) was introduced to complement the SAF- compliant Checkpointing Service. MBCSv defines a simple synchronization protocol which keeps an active and one or more of its stand-by entities in synchronization. Unlike the SAF- compliant Checkpointing Service, the MBCSv does not maintain replicas.

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

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Motorola 6806800C08B manual Message-Based Checkpointing Service, Management Access Server, Snmp Management Access Point

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.