【摘要】 COSMOS文件系统提供单一系统映象和严格的 UNIX语义 ,提供与 UNIX文件系统的应用程序二进制兼容 .系统中没有引入集中的服务器瓶颈 ,所有的数据、元数据和目录文件都被分散存储在整个系统中 ,以提供高性能和良好的可扩展性 .测试表明 ,COSMOS文件系统具有很好的系统带宽和整体性能 ,系统具有良好的可扩展性 .文中讨论了影响系统性能和可扩展性的关键因素 .基于作者的实现经验和测试数据 ,讨论了现有系统中存在的性能瓶颈并且提出了改进的方案更多还原

【Abstract】 COSMOS file system provides single system image (SSI) and strict Unix semantics. It guarantees user level binary compatibility with general Unix file systems, and is designed to be a scalable system. No bottleneck of centralized service is introduced. All data, including metadata and directory files, are distributed into the whole system to provide high performance and scalability. Our tests show satisfactory bandwidth and overall performance of COSMOS, and the system scales well. We discuss the key factors affecting the system performance and scalability. Based on implementation experience and test data, we discuss the bottlenecks of the existing system and propose methods for future improvement.更多还原