Книга: Embedded Linux Primer: A Practical, Real-World Approach

1.4.2.1. OSDL: Carrier Grade Linux

1.4.2.1. OSDL: Carrier Grade Linux

A significant number of the world's largest networking and telecommunications equipment manufacturers are either developing or shipping carrier-class equipment running Linux as the operating system. Significant features of carrier-class equipment include high reliability, high availability, and rapid serviceability. These vendors design products using redundant, hot-swap architectures, fault-tolerant features, clustering, and often real-time performance.

The OSDL Carrier Grade Linux working group has produced a specification defining a set of requirements for carrier-class equipment. The current version of the specification covers seven functional areas:

• Availability Requirements that provide enhanced availability, including online maintenance operations, redundancy, and status monitoring

• Clusters Requirements that facilitate redundant services, such as cluster membership management and data checkpointing

• Serviceability Requirements for remote servicing and maintenance, such as SNMP and diagnostic monitoring of fans and power supplies

• Performance Requirements to define performance and scalability, symmetric multiprocessing, latencies, and more

• Standards Requirements that define standards to which CGL-compliant equipment shall conform

• Hardware Requirements related to high-availability hardware, such as blade servers and hardware-management interfaces

• Security Requirements to improve overall system security from various threats

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