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Learn how NTT Docomo Business, Inc. tackles the complex challenges of operating an enterprise-grade OpenStack private cloud through their innovative 'Spiral Upgrade Strategy.' Discover practical solutions to performance bottlenecks, behavioral changes, and compatibility issues that emerge during comprehensive component upgrades spanning physical servers, operating systems, virtualization layers, OpenStack core, and network controllers. Explore real-world case studies demonstrating how to balance rapid technological evolution with stable operations while implementing phased, minimal-downtime updates across interdependent infrastructure components. Gain insights from concrete examples of troubleshooting and resolving critical issues that appear only under specific operational conditions in production environments.
