Disk scheduling is one of the main responsibilities of Operating System. OS manages hard disk to provide best access time. All major Disk scheduling algorithms incorporate seek time as the only factor for disk schedul...Disk scheduling is one of the main responsibilities of Operating System. OS manages hard disk to provide best access time. All major Disk scheduling algorithms incorporate seek time as the only factor for disk scheduling. The second factor rotational delay is ignored by the existing algorithms. This research paper considers both factors, Seek Time and Rotational Delay to schedule the disk. Our algorithm Fuzzy Disk Scheduling (FDS) looks at the uncertainty associated with scheduling incorporating the two factors. Keeping in view a Fuzzy inference system using If-Then rules is designed to optimize the overall performance of disk drives. Finally we compared the FDS with the other scheduling algorithms.展开更多
针对Flash存储器特殊的硬件特性和编程特性,提出了在其底层驱动和上层应用之间增加一个中间层(Logical Disk Sys-tem,LDS)。LDS屏蔽了Flash的硬件特性,间接实现了擦写平衡。LDS的核心是block映射机制。文中介绍了block映射机制的物理块...针对Flash存储器特殊的硬件特性和编程特性,提出了在其底层驱动和上层应用之间增加一个中间层(Logical Disk Sys-tem,LDS)。LDS屏蔽了Flash的硬件特性,间接实现了擦写平衡。LDS的核心是block映射机制。文中介绍了block映射机制的物理块状态管理、物理块逻辑关系管理、映射关系表管理、垃圾回收机制等关键技术。最后通过一个实例对LDS进行性能分析,验证了该方法在实际应用中的可行性。展开更多
文摘Disk scheduling is one of the main responsibilities of Operating System. OS manages hard disk to provide best access time. All major Disk scheduling algorithms incorporate seek time as the only factor for disk scheduling. The second factor rotational delay is ignored by the existing algorithms. This research paper considers both factors, Seek Time and Rotational Delay to schedule the disk. Our algorithm Fuzzy Disk Scheduling (FDS) looks at the uncertainty associated with scheduling incorporating the two factors. Keeping in view a Fuzzy inference system using If-Then rules is designed to optimize the overall performance of disk drives. Finally we compared the FDS with the other scheduling algorithms.
文摘针对Flash存储器特殊的硬件特性和编程特性,提出了在其底层驱动和上层应用之间增加一个中间层(Logical Disk Sys-tem,LDS)。LDS屏蔽了Flash的硬件特性,间接实现了擦写平衡。LDS的核心是block映射机制。文中介绍了block映射机制的物理块状态管理、物理块逻辑关系管理、映射关系表管理、垃圾回收机制等关键技术。最后通过一个实例对LDS进行性能分析,验证了该方法在实际应用中的可行性。
