pentennea.com
				Carrier-grade software Pentennea, LLC provides consulting for firms that need to deliver carrier-grade software. Carrier-grade software is found in products that implement communications networks, such as routers, switches, servers, gateways, and mobile handsets. Firms that operate these types of networks are known as carriers, and so the term carrier-grade describes products that meet their stringent quality standards.  The need for carrier-grade software is now emerging in other mission critical applications, such as high-end web servers, storage area network equipment, and video-on-demand servers. Carrier-grade software faces extreme availability, reliability, and scalability requirements. These typically include
							Availability: <5 minutes downtime per year (five nines, or 99.999%)
							Reliability: <1 failure per 10,000 sessions (four nines, or 99.99%)
							Scalability: >100,000 users per system (site), and millions of users per network
				To meet these requirements, carrier-grade software uses many techniques that are not common practice in the computing industry. Until recently, these techniques had never been documented in a comprehensive manner. Now, however, there is a book that describes the programming techniques and patterns that are central to the construction of carrier-grade software. And if that's not enough, you can also obtain consulting on carrier-grade software.

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