The numbers of algorithms are proposed to schedule real time transactions in order to produce the overall performance. This paper presents the overview of existing approaches for scheduling the real- time transactions. Earliest Deadline First (EDF) is a basic algorithm which meets the...
Spanned Volume: A spanned volume is one that can span multiple physical disk drives that logically appear to the OS as a single drive. ▪ Striped Volume: A striped volume provides software RAID level 0 functionality. RAID level 0 does not provide redundancy in the event of disk failure bu...
422_磁盘调度算法 各位同学大家好,在这个小节中我们会学习一个很重要很高频的考点磁盘调度算法,首先我们会介绍一次读磁盘操作或者一次写磁盘操作到底需要多少时间,我们应该怎么计算。它总共分为寻道时间、延迟时间和传输时间这样三个部分 磁盘调度算法的不同会影响寻找时间的长短,所以选择一个合适的磁盘...
HU Ming.A Disk Scheduling Algorithm: SPFF.武汉大学学报:自然科学英文版.2005.983-987H. Ming, "A disk scheduling algorithm: SPFF," Wuhan University Journal of Natural Sciences, Vol 10 Number 6 / November, 2005.H. Ming, "A disk scheduling algorithm: SPFF,"Wuhan University Journal of Natural ...
For high-performance computing, the disk scheduling algorithms also need to be optimized along with optimization of CPU scheduling. The proposed scheduling algorithm improves the performance measure of the disk scheduling algorithm by reducing the seek time, the rotational latency, and the platter ...
We present a real-time disk scheduling algorithm, Concurrent DS-SCAN (CDS-SCAN), which maximizes throughput for modern storage devices by allowing concurrent I/O requests at the device whenever possible. Past real-time disk scheduling algorithms allowed a single request at a time to go to the ...
Amortized analysis of some disk scheduling algorithms: SSTF, SCAN, and N-Step SCAN. BIT Numerical Mathematics , 32 , 546–558.Sayadi, M. K., Ramezanian, R., & Ghaffari-Nasab, N. ( 2010 ). A discrete firefly meta-heuristic with local search for makespan minimization in permutation flow...
And then by simulative and analytical method, a vibration rule had been studied; furthermore, the optimization algorithm of disk scheduling based on the average seek time was proposed. The optimization algorithm can enhance the efficiency of disk scheduling by selecting proper algorithm in real time...
In this paper, a new cache-scheduling algorithm for the disk array, called track-based improved LRU algorithm, is proposed. The basic element, during the scheduling, is a track of disk drive. It is the combination of read-ahead caching, fast-write, elevator write-back and LRU replacement ...
This work is motivated toward developing such an algorithm. The goal of this paper is to demonstrate that the simultaneous optimization of completion time and missed tasks produces an efficient schedule for real-time disk scheduling. The objective function is designed to minimize the two parameters....