Core Insights - Tencent Cloud provides a comprehensive guide for replacing CentOS, addressing the risks associated with CentOS's discontinuation and offering solutions for a smooth transition to TencentOS Server [1][4]. Group 1: CentOS Discontinuation and Its Impacts - CentOS has been a significant player in the server operating system market, especially in industries like finance, energy, and manufacturing, with over 350,000 companies globally using it [8]. - The discontinuation of CentOS maintenance began in December 2020, with CentOS 7 set to stop service on June 30, 2024, leading to increased security risks, lack of technical support, and compatibility challenges for applications [9][11]. - The risks include heightened security vulnerabilities due to the absence of official patches, increased difficulty in resolving technical issues without official support, and challenges in application compatibility with new software and hardware [11][12]. Group 2: Replacement Strategies - Companies can choose from three main replacement strategies: 1. **In-place Replacement**: Directly replacing the existing CentOS system with TencentOS using tools, which is quick but may fail in complex environments [13][15]. 2. **New Deployment**: Setting up TencentOS on new hardware, which is safer but requires additional resources and time [17][19]. 3. **Managed Services**: Keeping the existing environment while receiving support from a vendor, suitable for legacy systems that cannot afford downtime [18][20]. Group 3: TencentOS Server Advantages - TencentOS Server V3, based on the Linux kernel, is designed to be compatible with various domestic CPU architectures and offers a 30% performance improvement in database operations and over 15% memory savings [2]. - The server also enhances resource utilization, with a reported 43% reduction in operational costs for WeChat after implementing energy control solutions [2]. - It integrates AI capabilities, doubling GPU utilization for large model inference tasks [2]. Group 4: Case Studies and Implementation - A provincial government cloud project successfully used in-place replacement and new cluster deployment of TencentOS, ensuring service continuity and rapid business expansion [3]. - A central government unit completed the in-place replacement of 400 servers in just 10 days with a near 100% success rate, demonstrating the effectiveness of Tencent's migration tools [41]. - A city metro system faced compliance risks and successfully migrated over 30 core business systems to TencentOS, achieving a migration success rate close to 100% and reducing operational costs by approximately 30% [45]. Group 5: Migration Tools and Processes - Tencent's migration solution includes the TOSAM automation platform and the migrate2tencentos tool, facilitating a seamless transition without the need for intrusive installations [46][48]. - The migration process is designed to minimize downtime, with successful migrations reported to take less than 15 minutes [43]. - The tools ensure compatibility with existing applications, allowing for a smooth transition from CentOS to TencentOS without requiring additional adaptations [32].