OpenStack for Architects - Second Edition

High availability, resiliency, and scaling

Most telecoms demand extremely high availability and reliability in their carrier grade infrastructure. Like most cloud platforms and native cloud applications, this is achieved by massive horizontal scaling. Although this may be a new convention for telcos because they have relied on an appliance and vertical scaling model, it will ultimately deliver telecoms additional reliability because it pushes more of the responsibility for availability requirements up to the application layer. Individual compute hardware in a cloud environment cannot provide 99.999% of uptime; however, applications running on many of these cloud hosts can provide it. With the distributed nature of cloud-based applications, ...