【摘要】 为了使对象存储系统在处理不同大小文件时兼顾并行性和负载均衡,提出一种能够结合哈希算法和分片算法的优点,同时尽量避免其缺点的柔性分布算法.柔性分布算法将大小文件的边界值界定为512 Kbyte,小文件直接映射成一个对象并使用哈希策略映射到一个设备中;大文件分割成多个对象,分别放置在不同的设备里.实验结果显示:柔性分布算法在不同规模的系统中开销最小,且性能受设备数增加的影响较小.更多还原

【Abstract】 In order to satisfy both load balance and parallel operation when dealing with file requests of different size in object storage system, a hybrid mapping algorithm is proposed which is characterized by hashing and fragment-mapping approaches and avoids their shortcomings.The bound of big or small file was set as 512 Kbyte.Small files are mapped though hashing function directly to one object storage device(OSD),while big files are mapped to multiple objects and stored onto OSDs.Experiment results indicate that this hybrid algorithm has the lowest workload and lest influence when device number increasing.更多还原