Explore a 21-minute presentation that delves into real-world experiences managing large-scale OpenStack environments from an infrastructure operator's perspective. Gain valuable insights from two major private cloud environments - Verda (formerly LINE) and YNW (Yahoo! New World) - as operators share critical knowledge about OpenStack implementation and management. Learn essential strategies for OpenStack upgrades, discover effective deployment and packaging methodologies, and understand rack and room lifecycle operations. Presented by industry experts Yushiro Furukawa, Nisha Brahmankar, and Shunya Kitada, this talk offers practical knowledge aimed at enhancing understanding and operational efficiency for OpenStack providers.